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Journal articles on the topic 'Low temperature co-fire ceramic'

Author: Grafiati
Published: 4 June 2021
Last updated: 15 February 2022

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1

Shao, Hui, and Gang Jian. "Microwave Dielectric Properties and its Compatibility with Silver of Glass-Ceramic Based on Co-Fire at Low Temperature." Advanced Materials Research 704 (June 2013): 167–72. http://dx.doi.org/10.4028/www.scientific.net/amr.704.167.

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Low temperature co-fired glass-ceramic-Ag metal electrode systems were investigated in relation to Ag diffusion and micro structural development during firing. Sintering temperature was in a range of 800°C-900°C. At lower temperature of 800°C, Ag ion was diffused through in the LTCC substrates. However, Ag diffusion was not observed at 850°C below. Simultaneously, the densification of the electrode was greatly improved. With increasing sintering temperature, glass-ceramic to the electrode does not occur due to increase of the densification of the sample. The glass-ceramics exhibited good dielectric properties: εr=7.74, tanδ=0.7×10-3 at 850°C for 0.5h.
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2

Shiao, Fu Thang, Han Chou Ke, and Ying Chieh Lee. "Phase Transformation Behavior of Bi2O3-ZnO-Nb2O5 Ceramics Sintered at Low Temperature." Materials Science Forum 534-536 (January 2007): 1477–80. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.1477.

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To co-fire with commercial LTCC (Low Temperature Co-fired Ceramic) materials at 850oC ~ 880 oC, different contents of B2O3 were added to the Bi2O3-ZnO-Nb2O5 (BZN) ceramics. The dielectric properties of BZN ceramics sintered at low temperatures were studied. According to the test results, the cubic phase of BZN was transformed into orthorhombic in all the test materials. A BiNbO4 phase was formed in test materials with 2 ~ 5 wt% of B2O3 addition. The BiNbO4 phase was inhibited by extra ZnO addition. The phase transformation of cubic BZN was controlled during the synthesis process of cubic and orthorhombic ZnO-Nb2O5 phase with excess ZnO content. The Cubic and orthorhombic phases of BZN could coexist and be sintered densely at 850 oC/2hr.
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3

Majer, Zdeněk, Kateřina Štegnerová, Pavel Hutař, Martin Pletz, Raul Bermejo, and Luboš Náhlík. "Residual Lifetime Determination of Low Temperature Co-Fired Ceramics." Key Engineering Materials 713 (September 2016): 266–69. http://dx.doi.org/10.4028/www.scientific.net/kem.713.266.

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The effect of subcritical crack growth is nowadays intensively studied mainly in relation to the strength of ceramic materials. The main aim of the contribution is to describe behavior of micro-crack propagating in the Low Temperature Co-fired Ceramics (LTCC) under subcritical crack growth (SCCG) conditions. The micro-crack behavior is significantly influenced by residual stresses developed in the LTCC due to different coefficients of thermal expansion of individual components. Two-dimensional numerical model was developed to simulate micro-crack propagation through the composite. The micro-crack propagation direction was determined using Sih’s criterion based on the strain energy density factor and the micro-crack path was obtained. The residual lifetime of the specific ceramic particulate composite (LTCC) was estimated on the basis of experimental data. The paper contributes to a better understanding of micro-crack propagation in particulate ceramic composites in the field of residual stresses.
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4

SU, Che-Yi, Cheng-Liang HUANG, and Wen-Hsi LEE. "Phase development and dielectric properties of BaAl2Si2O8-based low temperature co-fire ceramic material." Journal of the Ceramic Society of Japan 116, no. 1357 (2008): 935–40. http://dx.doi.org/10.2109/jcersj2.116.935.

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5

Mercke, William L., Thomas Dziubla, Richard E. Eitel, and Kimberly Anderson. "Biocompatibility Evaluation of Human Umbilical Vein Endothelial Cells Directly onto Low-Temperature Co-fired Ceramic Materials for Microfluidic Applications." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (September 1, 2012): 000549–56. http://dx.doi.org/10.4071/cicmt-2012-tha11.

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Expansion of Low-Temperature Co-fired Ceramic materials into microfluidic systems technology has many beneficial applications due to their ability to combine complex three dimensional structures with optical, fluidic, electrical functions. Evaluations of the biocompatibility of these Low-Temperature Co-fired Ceramic materials are vital for expanding into biomedical research. The few biocompatibility studies on Low-Temperature Co-fired Ceramics generally show negative cellular response to thick film pastes used in generating the electronic circuitry patterns. In this study, biocompatibility of Human Umbilical Vein Endothelial Cells was examined on Heraeus's Low-Temperature Co-fired Ceramic tape and two of their conductive pastes. The biocompatibility was assessed by monitoring cellular attachment and viability up to three days. This study examines the idea of leachates being detrimental to cells due to a study that suggests the possibility of harmful leachates. Results indicate difficulty in initial attachment of Human Umbilical Vein Endothelial Cells to sintered Low-Temperature Co-fired Ceramic tapes, but no hindrance of cellular attachment and growth onto the two conductive pastes. Outcomes also demonstrate that possible harmful leachates from Low-Temperature Co-fired Ceramic materials don't thwart cellular attachment and growth for up to three days of cell culturing. These results provide a basis for biological devices using Low-Temperature Co-fired Ceramic materials.
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6

Wang, Rui, Ji Zhou, Hongjie Zhao, Bo Li, and Longtu Li. "Oxyfluoride glass-silica ceramic composite for low temperature co-fired ceramics." Journal of the European Ceramic Society 28, no. 15 (November 2008): 2877–81. http://dx.doi.org/10.1016/j.jeurceramsoc.2008.05.010.

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7

Luo, Jin, and Richard Eitel. "Biocompatible low temperature co-fired ceramic for biosensors." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, CICMT (September 1, 2013): 000183–86. http://dx.doi.org/10.4071/cicmt-wp35.

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Low temperature co-fired ceramic (LTCC) electronic packaging materials are applied for their ease of fabrication, three dimensional features and integration of multifunctional component, such as optical and electrical functions. For these reasons LTCC is attractive for biomedical microfluidics and Lab-on-a-Chip systems. However, commercial LTCC systems, optimized for microelectrics applications, are not designed for biomedical applications, and have unknown cytocompatibility. In the current work, LTCC has been developed starting with materials of known composition and biocompatibility. The developed LTCC, fabricated from a lime silicate glass and pure alumina, exhibits low sintering temperature (<1000°C) and high density. Alumina reacts with the glass and forms anorthite type crystalline phase CaAl2Si2O8 at temperature 900°C. A commercial gold electrode paste has also been co-fired with the LTCC, with no delamination, cracks nor camber observed. In-vitro biocompatibility of LTCC has been evaluated using human umbilical vein endothelial cells (HUVEC). The HUVECs attach and spread on the surface of the LTCC substrates, and also in the leachate obtained by soaking LTCC in cell media for seven days. The cell density and percentage of live cells on LTCC surface are comparative with those of control. Results indicate the developed LTCC materials are biocompatible and suitable for biomedical applications.
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8

Wu, Ming-Hsun, and Richard Yetter. "A LOW TEMPERATURE CO-FIRED CERAMIC ELECTROLTYIC MICROTHRUSTER." International Journal of Energetic Materials and Chemical Propulsion 8, no. 4 (2009): 357–71. http://dx.doi.org/10.1615/intjenergeticmaterialschemprop.v8.i4.80.

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9

Jurków, Dominik, Thomas Maeder, Arkadiusz Dąbrowski, Marina Santo Zarnik, Darko Belavič, Heike Bartsch, and Jens Müller. "Overview on low temperature co-fired ceramic sensors." Sensors and Actuators A: Physical 233 (September 2015): 125–46. http://dx.doi.org/10.1016/j.sna.2015.05.023.

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10

Radosavljević, Goran, Mariana Mădălina Pochia, Daniela Rosca, Nelu Blaž, and Andrea Marić. "Capacitive Low Temperature Co-Fired Ceramic Fluidic Sensor." Sensor Letters 11, no. 4 (April 1, 2013): 646–49. http://dx.doi.org/10.1166/sl.2013.2933.

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11

Zhu, Jijun, Jia Cheng, and Simon S. Ang. "A Low Temperature Co-Fired Ceramic Mesofluidic Separator." Journal of Physics: Conference Series 34 (April 1, 2006): 734–39. http://dx.doi.org/10.1088/1742-6596/34/1/121.

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12

Wang, R., J. Zhou, X. G. Huang, L. Sun, and L. T. Li. "Oxyfluoride Glass-Ceramic Composites for Low Temperature Co-Fired Ceramic Substrate." Ferroelectrics 388, no. 1 (September 28, 2009): 31–35. http://dx.doi.org/10.1080/00150190902963716.

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13

Dai, Steve, and Lung-Hwa Hsieh. "Temperature-Compensated Bandpass Filters in Low Temperature Co-Fired Ceramic." International Journal of Applied Ceramic Technology 11, no. 3 (December 5, 2013): 475–79. http://dx.doi.org/10.1111/ijac.12196.

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14

Galipeau, James, and George Slama. "Characterization and Reliability Testing on an LTCC Transformer Operable to 250 °C." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, HITEC (January 1, 2012): 000354–60. http://dx.doi.org/10.4071/hitec-2012-tha24.

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Environments prone to vibration and shocks can cause premature failure in small wire-wound transformers due to cracked cores and broken wires. These problems are only exacerbated by temperatures exceeding 200 °C where the heat causes organic compounds to age rapidly. As more electronics are used in harsh, high temperature environments, high reliability, compact transformers for use in power, filtering, and isolation applications are needed. To address this need monolithic low-temperature co-fired ceramic transformers were developed. In this work transformers were made from a low-temperature, co-fire compatible, ferrite with a Curie temperature of 350 °C. The transformers were first subjected to a 2,000 hour life test at 250 °C in which the transformer was used to charge a load capacitor once every two seconds. The inductance, resistance, core loss, and saturation flux density of the transformers were measured at various temperatures. Additional testing focused on the effect of temperature on the device's frequency profile and performance changes under thermal cycling.
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15

Pan, C. T., and Y. J. Chen. "Application of low temperature co-fire ceramics on in-plane micro-generator." Sensors and Actuators A: Physical 144, no. 1 (May 2008): 144–53. http://dx.doi.org/10.1016/j.sna.2007.12.008.

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16

Ghitulica, Cristina, Ecaterina Andronescu, O. Nicola, and Mihaela Birsan. "Porous Ceramics for High Temperature Filters." Advanced Materials Research 47-50 (June 2008): 960–63. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.960.

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Cordierite based ceramic porous materials are very promising for filtering applications, due to their low thermal expansion coefficient, but also due to high chemical stability and good mechanical resistance. The cordierite powders were obtained through the co-precipitation method, while the porous ceramics were prepared by mixing the ceramic powder with an organic compound, which will burn during consequent thermal treatments, leading to an open pore ceramic web. Samples with different proportions of glucose were thermally treated at temperatures between 1050 and 1400oC. The samples were analyzed in what it concerns the mineralogical composition, open porosity and pores distribution, compressive strength and microstructure.
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17

He, Qing, and Zhi Ting Geng. "Densification Mechanism of the Low Temperature Co-Fired Glass-Ceramic Substrate." Key Engineering Materials 492 (September 2011): 122–25. http://dx.doi.org/10.4028/www.scientific.net/kem.492.122.

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In this paper, application of multilayered circuit substrates has been studied, the glass ceramic (50%Al2O3-50%glass) with low temperature co-fired and good performance as the raw material was used, by means of calculating the apparent activation energy of densification in the experiment and observing the SEM images of glass ceramic substrate section, the densification mechanism of glass ceramic substrate sintering is analyzed.
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18

Rathi, A. Priya, and A. Vimala Juliet. "A Low Temperature Co-Fired Ceramic Microfluidic Cell Counter." Applied Mechanics and Materials 592-594 (July 2014): 2261–66. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.2261.

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A three-dimensional microfluidic biosensor has been successfully designed using a low temperature co-fired ceramic (LTCC) technology. This microfluidic sensor consists of mixing, focusing and measuring region. The mixing region is a rectangular shaped channel, to enable the complete mixing of sample and buffered saline solution. An electrode pair in the focusing region uses negative dielectrophoretic forces to direct the cells from all directions of the channel towards the center. The measuring region consists of eleven pairs of gold plated electrodes to measure the change in impedance whenever a cell passes through it. The layout of the design is made using AUTOCAD tool and simulated using COMSOL Multiphysics. The results demonstrate the mixing efficiency of two fluids for different velocities.
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19

Malecha, Karol. "Integration of Optoelectronic Components with LTCC (Low Temperature Co-Fired Ceramic) Microfluidic Structure." Metrology and Measurement Systems 18, no. 4 (January 1, 2011): 713–22. http://dx.doi.org/10.2478/v10178-011-0067-3.

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Integration of Optoelectronic Components with LTCC (Low Temperature Co-Fired Ceramic) Microfluidic StructureInvestigations on integration of optoelectronic components with LTCC (low temperature co-fired ceramics) microfluidic module are presented. Design, fabrication and characterization of the ceramic structure for optical absorbance is described as well. The geometry of the microfluidic channels has been designed according to results of the CFD (computational fluid dynamics) analysis. A fabricated LTCC-based microfluidic module consists of an U-shaped microchannel, two optical fibers and integrated light source (light emitting diode) and photodetector (light-to-voltage converter). Properties of the fabricated microfluidic system have been investigated experimentally. Several concentrations of potassium permanganate (KMnO4) in water were used for absorbance/transmittance measurements. The test has shown a linear detection range for various concentrations of heavy metal ions in distilled water. The fabricated microfluidic structure is found to be a very useful system in chemical analysis.
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20

Makarovič, Kostja, Darko Belavič, Barbara Malič, Andreja Benčan, Franci Kovač, and Janez Holc. "Small ozone generator fabricated from low-temperature co-fired ceramics." Microelectronics International 38, no. 1 (January 12, 2021): 1–5. http://dx.doi.org/10.1108/mi-07-2020-0043.

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Purpose The purpose of this study is the design, fabrication and evaluation of a miniature ozone generator using the principle of electric discharge are presented. Design/methodology/approach The device was fabricated using a low-temperature co-fired ceramics (LTCC) technology, by which a multilayered ceramic structure with integrated electrodes, buried channels and cavities in micro and millimeter scales was realized. Findings The developed ozone generator with the dimensions of 63.6 × 41.8 × 1.3 mm produces approximately 1 vol. % of ozone in oxygen flow of 15 ml/min, at an applied voltage of 7 kV. Originality/value A miniature ozone generator, manufactured in LTCC technology, produces high amount of ozone and more than it is described in the available references or in datasheets of commercial devices of similar size.
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21

Chen, Liang-Yu. "Electrical Performance of Co-Fired Alumina Substrates at High Temperatures." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, HITEC (January 1, 2012): 000173–78. http://dx.doi.org/10.4071/hitec-2012-wa22.

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A 96% polycrystalline alumina (Al2O3) based prototype packaging system with Au thick-film metallization successfully facilitated long term testing of high temperature SiC electronic devices for over 10,000 hours at 500°C previously. However, the 96% Al2O3 chip-level packages of this prototype system were not fabricated via a commercial co-fire process which is more suitable for large scale commercial production. The co-fired alumina materials adopted by the packaging industry today usually contain several percent of glass constituents to provide better adhesion and sealing at interfaces formed during a co-firing process at temperatures usually lower than the regular sintering temperature for alumina. In order to answer the question if co-fired alumina substrates can provide reasonable high temperature electrical performance comparable to those of regular 96% alumina sintered at 1700°C, this paper reports on the dielectric performance of a selected high temperature co-fired ceramic (HTCC) alumina substrate and a low temperature co-fired ceramic (LTCC) alumina (polycrystalline aluminum oxides with glass constituents) substrate from room temperature to 550°C at frequencies of 120 Hz, 1 KHz, 10 KHz, 100 KHz, and 1 MHz. Parallel-plate capacitive devices with dielectrics of these co-fired alumina and precious metal electrodes were used for measurement of the dielectric properties of the co-fired alumina materials in the temperature and frequency ranges. The capacitance and AC parallel conductance of these capacitive devices were directly measured by an AC impedance meter, and the dielectric constant and parallel AC conductivity of the dielectric were calculated from the capacitance and conductance measurement results. The temperature and frequency dependent dielectric constant, AC conductivity, and dissipation factor of selected LTCC and HTCC co-fired alumina substrates are presented and compared to those of 96% alumina. Metallization schemes for co-fired alumina for high temperature applications are discussed to address packaging needs for low power 500°C SiC electronics.
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22

Cheng, Chung-Chin, Tsung-Eong Hsieh, and I.-Nan Lin. "Microwave dielectric properties of glass-ceramic composites for low temperature co-firable ceramics." Journal of the European Ceramic Society 23, no. 14 (January 2003): 2553–58. http://dx.doi.org/10.1016/s0955-2219(03)00166-3.

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23

Chen, Cheng-Sao, Chen-Chia Chou, Wei-Jan Shih, Kuo-Shung Liu, Chang-Shun Chen, and I.-Nan Lin. "Microwave dielectric properties of glass–ceramic composites for low temperature co-firable ceramics." Materials Chemistry and Physics 79, no. 2-3 (April 2003): 129–34. http://dx.doi.org/10.1016/s0254-0584(02)00281-x.

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24

ZHOU, DI, LI-XIA PANG, JING GUO, YING WU, GAO-QUN ZHANG, HONG WANG, and XI YAO. "SINTERING BEHAVIOR AND MICROWAVE DIELECTRIC PROPERTIES OF NOVEL LOW TEMPERATURE FIRING Bi3FeMo2O12 CERAMIC." Journal of Advanced Dielectrics 01, no. 04 (October 2011): 379–82. http://dx.doi.org/10.1142/s2010135x11000550.

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In the present work, a novel low temperature firing Bi 3 FeMo 2 O 12 ceramic was synthesized via the solid-state reaction method. The monoclinic Bi 3 FeMo 2 O 12 phase can be formed at a low temperature 670°C. A relative density above 96% can be obtained when sintering temperature is above 800°C. The Bi 3 FeMo 2 O 12 ceramic sintered at 845°C for 2 h shows high microwave dielectric performance with a permittivity ~27.2, a Qf value of 14,500 GHz and a temperature coefficient of -80 ppm/°C. It might be a candidate for low temperature co-fired ceramics technology.
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25

Chaouchi, A., M. Saidi, S. d’Astorg, and S. Marinel. "CaZn1/3Nb2/3O3-based dielectric ceramics for silver co-sintering applications." Science of Sintering 44, no. 3 (2012): 299–305. http://dx.doi.org/10.2298/sos1203299c.

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The Ca(Zn1/3Nb2/3)O3 (CZN) complex perovskite oxide has been studied for its attractive dielectric properties (?r=34, Qxf=15 890GHz, ?f=-48 ppm.?C-1) for applications such as multilayer ceramics capacitors or hyperfrequency resonators. Nevertheless, high temperatures (>1250?C) are required to obtain well dense CZN ceramic, prohibiting any silver co-sintering (Tf (Ag) = 961?C). For that reason, the sintering temperature lowering of CZN by glass phase?s additions has been investigated. This material is finally sinterable at low temperature with combined glass phase -lithium salt additions, and exhibits, at 1MHz, very low dielectric losses, a relatively high dielectric constant with a good stability versus temperature. The 2%weight of ZnO-SiO2-B2O3 glass phase and 1%wt of LiF added CZN sample sintered at 920?C exhibits a relative density higher than 95% and attractive dielectric properties: a dielectric constant ?r of 22, low dielectrics losses (tan (?)< 10-3), a temperature coefficient of the permittivity ??<100 ppm.?C-1, and an insulating resistivity higher than 1013?.cm. Its interesting properties and its co-sinterability with silver electrodes make this ceramic suitable for L.T.C.C applications.
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26

Nair, Deepukumar M., James Parisi, K. M. Nair, Mark McCombs, Michael Smith, Elizabeth Hughes, Ken Souders, et al. "Introducing DuPont™ GreenTape™ 9K5 Low Dielectric Constant, Low Temperature Co-Fired Ceramic (LTCC) Tape System." International Symposium on Microelectronics 2011, no. 1 (January 1, 2011): 000544–52. http://dx.doi.org/10.4071/isom-2011-wa3-paper4.

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Low Temperature Co-fired Ceramic (LTCC) material systems have been successfully used in microwave and millimeter wave systems for several years. LTCC has very low dielectric loss, high reliability due to inherent hermeticity; high interconnect density, multilayer processing capability leading to true 3D packaging, and better cost-performance balance. While the medium range dielectric constants (7.00 – 8.00) offered by current tape systems have advantages, it is generally difficult to realize high speed systems and efficient antennas on LTCC, especially at millimeter wave frequencies. The difficulty arises from the reduced signal propagation velocity in high-speed applications, and lower radiation efficiency for antennas, both due to higher dielectric constant. To enable and extend applications of LTCC technology to these subsystems, DuPont has developed a new low dielectric constant LTCC system – DuPont™ GreenTape™ 9K5 - which has a dielectric constant of 5.80 (at 10 GHz) that is compatible with the commercial DuPont™ GreenTape™ 9K7 LTCC System. This is achieved without compromising excellent microwave loss properties of the 9KX GreenTape™ platform. These materials systems enable high-speed, high reliability applications while also realizing efficient antennas on LTCC. This paper presents initial characterization of the new DuPont™ GreenTape™ 9K5 LTCC system consisting of low K dielectric tape, gold and silver conductors to evaluate the effects of chemistry, processing conditions, processing latitude, microstructure, and microwave performance. Test coupons with various transmission and resonating structures are designed, fabricated, and tested for the evaluation of transmission losses and dielectric properties. Stability of the material system over multiple re-fire steps is also examined
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27

Jiang, Bo, Julien Haber, Albert Renken, Paul Muralt, Lioubov Kiwi-Minsker, and Thomas Maeder. "Fine structuration of low-temperature co-fired ceramic (LTCC) microreactors." Lab on a Chip 15, no. 2 (2015): 563–74. http://dx.doi.org/10.1039/c4lc01105h.

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We developed a novel low-temperature co-fired ceramic (LTCC) microfabrication method for making microreactors with complex fluidic structures for applications involving harsh chemicals and envir`onmental processes.
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28

Galipeau, James, and George Slama. "Reliability Testing on a Multilayer Chip Inductor Fabricated From a Ferrite With a 350 °C Curie Point." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2011, HITEN (January 1, 2011): 000014–20. http://dx.doi.org/10.4071/hiten-paper3-jgalipeau.

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As more electronics are used in down-hole energy exploration, under the hood automotive applications, and in other environments where temperatures exceed 200 °C; there is a need for compact passive magnetic components that operate reliably at elevated temperatures. Most ferrites used to make multi layer ceramic inductors have Curie temperatures in the 100–200 °C range. As temperatures rise above the Curie point ferrites lose their magnetic properties and become paramagnetic. This means that traditional multi-layer ceramic inductors suffer severe performance degradation when operated at elevated temperatures. Therefore, ferrite materials with higher Curie temperatures need to be developed to increase device performance and reliability at these high temperatures. In this work inductors were made from a low-temperature, co-fire compatible, ferrite with a Curie temperature of 350 °C. The inductors were first subjected to a 1000 hour life test at 300 °C during which the electrical parameters were found to change no more than 4 %. The inductance, resistance, core loss, and saturation flux density of the inductors were measured at various temperatures. Additional testing focused on the effect of temperature on the device's frequency profile and performance changes under thermal cycling and thermal shock.
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29

Polotai, Anton, Julie Voak, Jim Henry, David Thoss, Yi Yang, and Sanjay Chitale. "Elevated temperature impact on performance of Low Temperature Co‐fired Ceramic dielectrics." International Journal of Applied Ceramic Technology 17, no. 2 (September 4, 2019): 728–33. http://dx.doi.org/10.1111/ijac.13352.

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30

Zeng, Qun, and Yong Heng Zhou. "Studies on Structural, Microwave Dielectric Properties, and Low-Temperature Sintering of 1.52Li2O-0.36Nb2O5-1.34TiO2 Ceramic." Key Engineering Materials 512-515 (June 2012): 1226–30. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.1226.

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The structure, microwave dielectric properties and low-temperature sintering of a new Li2O-Nb2O5-TiO2 system ceramic with the Li2O: Nb2O5: TiO2 mole ratio of 1.52: 0.36: 1.34 have been investigated in this study. The 1.52Li2O-0.36Nb2O5-1.34TiO2 (LNT) ceramic is composed of two phases, the “M-Phase” and Li2TiO3 solid solution (Li2TiO3ss) phase. This new microwave dielectric ceramic has low intrinsic sintering temperature ( ~ 1100 oC ) and good microwave dielectric properties of middle permittivity (εr ~38.6), high Q×f value up to 7712 GHz, and near zero τf value (~ 4.64 ppm/oC). In addition, the sintering temperature of the LNT ceramics could be lowered down effectively from 1100 oC to 900 oC by adding 1 wt.% B2O3. Good microwave dielectric properties of εr = 42.5, Q*f =6819 GHz and τf = 2.7 ppm/oC could be obtained at 900 oC, which indicate the ceramics would be promising candidates for low-temperature co-fired ceramics (LTCC) applications.
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31

Nakai, Kyouichi, Kiyohito Shibata, Shuichi Kawaminami, and Shigeru Takahashi. "Low Temperature Co-fired Multilayer Ceramic Substrate with Enbedded Capacitors." Journal of SHM 9, no. 1 (1993): 24–30. http://dx.doi.org/10.5104/jiep1993.9.24.

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32

Wartenberg, S. A. "Tunable microwave coupler buried in low-temperature co-fired ceramic." IEEE Transactions on Microwave Theory and Techniques 48, no. 4 (April 2000): 618–19. http://dx.doi.org/10.1109/22.842036.

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33

Luo, Jin, and Richard E. Eitel. "A Biocompatible Low Temperature Co-fired Ceramic Substrate for Biosensors." International Journal of Applied Ceramic Technology 11, no. 3 (December 11, 2013): 436–42. http://dx.doi.org/10.1111/ijac.12206.

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34

Mercke, William L., Thomas Dziubla, Richard E. Eitel, and Kimberly Anderson. "Improved Trans-endothelial Electrical Resistance Sensing using Microfluidic Low-Temperature Co-fired Ceramics." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, CICMT (September 1, 2013): 000162–67. http://dx.doi.org/10.4071/cicmt-wp31.

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Trans-endothelial Electrical Resistance (TEER) and cellular impedance measurements are widely used to evaluate the barrier properties and functional change of endothelial cell monolayers. In the current work, low temperature cofired ceramics (LTCC) are applied enabling the incorporation of TEER and impediametric measurements in an integrated microfluidic chip. LTCC materials are an ideal substrate for biomedical and cell-based microfluidics due to their biocompatibility and ability to combine complex three dimensional structures with optical, fluidic, and electrical functionality. Multilayer microfluidic ceramic devices incorporating gold measurement electrodes where prepared using standard LTCC manufacturing procedures. The sensitivity of the resulting LTCC devices were compared to systems currently on the market for TEER measurements. These results indicate the LTCC device is able to effectively detect the growth of an endothelial cell monolayer. Results further evaluate endothelial cell viability using electrical resistance and Live/Dead assay. Finally, the results from this study also display improved sensitivity through the optimization of the electrode geometry and use of a lock-in amplifier. These results provide a solid basis for using low temperature co-fired ceramic materials for microfluidic TEER devices.
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35

Glover, Michael D., Michael C. Hamilton, Emmanuel Decrossas, Kaoru Porter, Alexander Pfeiffenberger, and H. Alan Mantooth. "A Low Loss Power Distribution Network Design in Low Temperature Co-fired Ceramic Technology." International Symposium on Microelectronics 2013, no. 1 (January 1, 2013): 000683–88. http://dx.doi.org/10.4071/isom-2013-wp32.

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The development of power distribution networks in low temperature co-fired ceramic (LTCC) to deliver power to electronic chips with minimal power loss and/or voltage drop presents real challenges. In the last decade, the power consumption for some applications has increased considerably while the supply voltage has been reduced. A number of designs for low loss power distribution networks were investigated for implementation using low temperature co-fired ceramics (LTCC) technology. This paper discusses the fabrication of power distribution networks (PDNs) using LTCC technology that exhibit sub-milliohm resistance through the use of full tape thickness features and other structures. Experimental data is also presented to support the viability of the approaches presented. The results presented in this paper show that the finite DC conductivity of the silver conductor paste commonly used in LTCC fabrication presents a challenge when attempting to build PDNs with low losses at high current levels. By analyzing a number of scenarios, several approaches are proposed that reduce the DC resistance laterally as well as vertically in a multi-layered LTCC PDN. Experiments and simulations show that the use of various processing techniques to increase the thickness of metallic traces can significantly reduce the lateral DC resistance of the PDN structure. In addition, various via configurations were simulated and fabricated that demonstrate an improvement in the performance of structures that distribute power vertically. Experiments using LTCC to carry a 100 A current were conducted to confirm simulations.
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36

Chen, Guohua, and Xinyu Liu. "Fabrication, characterization and sintering of glass-ceramics for low-temperature co-fired ceramic substrates." Journal of Materials Science: Materials in Electronics 15, no. 9 (September 2004): 595–600. http://dx.doi.org/10.1023/b:jmse.0000036038.51510.fb.

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37

Jurków, Dominik, Arkadiusz Dąbrowski, Tomasz Zawada, and Leszek Golonka. "PRELIMINARY MODEL AND TECHNOLOGY OF PIEZOELECTRIC LOW TEMPERATURE CO-FIRED CERAMIC (LTCC) UNIAXIAL ACCELEROMETER." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (September 1, 2012): 000584–91. http://dx.doi.org/10.4071/cicmt-2012-tha21.

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Design procedure, technology and basic properties of a piezoelectric Low Temperature Co-fired Ceramics (LTCC) accelerometer are presented in this paper. The sensor consists of a LTCC membrane with a seismic mass. Meggitt InSensor® PZT thick film has been applied as the sensing material. Finite element method (FEM) has been used to analyze the impact of the sensor geometry (membrane thickness, membrane and seismic mass radii) and PZT thick film placement on basic properties (sensitivity and bandwidth) of the device. The LTCC process was optimized in order to create thin and planar ceramic membrane with relatively huge seismic mass. Selected properties of the sensor have been measured and compared with the simulated ones.
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38

Alias, Rosidah, Sabrina Mohd Shapee, Mohd Zulfadli Mohamed Yusoff, Ibrahim Azmi, Zulkifli Ambak, and Muhammad Redzuan Saad. "Defect Observation of Embedded Components of a Low Temperature Co-Fired Ceramic." Materials Science Forum 654-656 (June 2010): 2394–97. http://dx.doi.org/10.4028/www.scientific.net/msf.654-656.2394.

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This paper reports observations of defects in laminated eight layers of a glass-ceramic composite system fabricated by a standard low temperature co-fired ceramic (LTCC) technology. The layers were laminated at 3000 psi and 70 °C for 10 minutes and were fired at 850 °C for 15 minutes. Material characterizations of the green compact and fired substrate were carried out on density, surface roughness and microstructure. The crack and warpage of the substrate were related to the microstructure and densification process of the system. It was found that the presence of these defects could be due to a mismatch of the sintering kinetics of the glass-ceramic composite system and silver conductor materials which lead to the development of stresses which act on both materials. The detailed microscopic observation of the internal and surface defects is explained.
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39

Zhang, Yu, Yanshan Gao, Heriberto Pfeiffer, Benoît Louis, Luyi Sun, Dermot O'Hare, and Qiang Wang. "Recent advances in lithium containing ceramic based sorbents for high-temperature CO2 capture." Journal of Materials Chemistry A 7, no. 14 (2019): 7962–8005. http://dx.doi.org/10.1039/c8ta08932a.

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Recently, lithium containing ceramic based high-temperature CO2 sorbents have received tremendous attention due to their high CO2 capture capacity, low regeneration temperatures, and relatively high stability.
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40

Somer, Jakub, Martin Klíma, Petr Machac, and Ivan Szendiuch. "Joining Low Temperature Co-Fired Ceramics, Al2O3 and SiC Substrates for Higher Operating Temperature Applications." Solid State Phenomena 258 (December 2016): 631–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.258.631.

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The article deals with forming solid joints of Low Temperature Co-fired Ceramic with Alumina or Silicon Carbide chips. The aim of this study is to find material of standard thick film layer process, which would be useful for electronic chip packages designed for higher operating temperatures (from 150 up to 800 °C). Heraeus Hera Lock 2000 Low Temperature Co-fired Ceramics (LTCC) was chosen, because of its nearly zero shrinkage during firing. Also other LTCC types were used to comparison of results. Conductive and isolating thick film pastes are used for joining. Temperature cycling of samples was applied. Strength of cycled samples was investigated by mechanical shear tests. The structure of microsection of joints was analyzed using optical and scanning electron microscope. The results show that thick film pastes are usable for joining above mentioned materials in specific temperature range.
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41

Ismail, Mukhlis M. "Ferroelectric characteristics of Fe/Nb co-doped BaTiO3." Modern Physics Letters B 33, no. 22 (August 7, 2019): 1950261. http://dx.doi.org/10.1142/s0217984919502610.

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[Formula: see text] ceramics ([Formula: see text] mol.%, [Formula: see text]:[Formula: see text] = 1:3, 2:3, 3:2, 3:1) were successfully prepared using the traditional solid-phase sintering method. The effects of the proportion doping (Fe/Nb) components on various properties of BaTiO3 ceramics were studied. The X-ray diffraction showed that all solid solutions have the single cubic phase at room temperature, and that dielectric permittivity exhibits a maximum, Curie’s temperature at the peak. The ceramics have obvious peak shift effect: Curie’s temperature shifts to low temperature as Fe/Nb ratio increases. The high Fe/Nb ratio BaTiO3 ceramic showed also an enhancement of the broadening effect for dielectric constant curve with respect to temperature, and dielectric permittivity peak reflected phase transition from rhombohedral to tetragonal polar-nano regions. Dielectric and ferroelectric properties of Fe/Nb co-doped BaTiO3 ceramics have obvious enhanced ferroelectric properties and have slender hysteresis loop beneficial for energy storage materials.
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42

Zhu, Jijun, Julong Yuan, and Simon S. Ang. "Study on the polishing mechanism of low temperature co-fired ceramic for microsystem application(Surface and edge finishing)." Proceedings of International Conference on Leading Edge Manufacturing in 21st century : LEM21 2005.3 (2005): 1171–76. http://dx.doi.org/10.1299/jsmelem.2005.3.1171.

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43

Miao, Xi Geng, Yu Yuan Shi, Wen Jun Zhu, Lin Luan, and Chun Lin Ji. "Characterisation of Low-Temperature Co-Firable Green Tapes for Making Fused Silica Laminated Composites." Applied Mechanics and Materials 670-671 (October 2014): 137–42. http://dx.doi.org/10.4028/www.scientific.net/amm.670-671.137.

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For achieving high-temperature resistance and a broadband of microwave transmission, ceramic metamaterials consisting of fused silica ceramic substrates and electrically conductive networks/ arrays are desirable. A new strategy of fabricating the fused silica metamaterials is to combine the low temperature co-fired ceramic (LTCC) technique with a method of ceramic joining via green tapes. The important part of the new strategy lies in the preparation of suitable green tapes that are co-firable with a conductive silver-based film/strip and have a strong affinity to the fused silica substrates. Therefore, in this paper, three green tape materials were prepared and intensively characterised using scanning electron microscopy, x-ray diffraction, dilatometry, dielectric measurement, etc. It was found that the tape materials were based on dielectric glasses and crystalline phases of major eulytite and minor cristobalite, leading to rather low levels of dielectric constant (<6) and loss tangent (in the order of 10-3). The three tape materials also had different levels of thermal expansion coefficients, co-firability with a conductive silver-based paste, and bondability to the fused silica substrates. These findings suggest that one can achieve desirable ceramic matematerials with well-controlled shapes and dimensions of the condutive networks/arrays after properly laminating the green tapes between the fused silica substrates.
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44

Roosen, A. "Low-Temperature/Low-Pressure Lamination of Green Ceramic Tapes." Advanced Engineering Materials 2, no. 6 (June 2000): 374–76. http://dx.doi.org/10.1002/1527-2648(200006)2:6<374::aid-adem374>3.0.co;2-o.

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45

Jung, Byung-Hae, Seong-Jin Hwang, and Hyung-Sun Kim. "Glass-ceramic for low temperature co-fired dielectric ceramic materials based on La2O3–B2O3–TiO2 glass with BNT ceramics." Journal of the European Ceramic Society 25, no. 13 (August 2005): 3187–93. http://dx.doi.org/10.1016/j.jeurceramsoc.2004.07.002.

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46

Yildiz, Fikret, Tadao Matsunaga, and Yoichi Haga. "Fabrication and Packaging of CMUT Using Low Temperature Co-Fired Ceramic." Micromachines 9, no. 11 (October 27, 2018): 553. http://dx.doi.org/10.3390/mi9110553.

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This paper presents fabrication and packaging of a capacitive micromachined ultrasonic transducer (CMUT) using anodically bondable low temperature co-fired ceramic (LTCC). Anodic bonding of LTCC with Au vias-silicon on insulator (SOI) has been used to fabricate CMUTs with different membrane radii, 24 µm, 25 µm, 36 µm, 40 µm and 60 µm. Bottom electrodes were directly patterned on remained vias after wet etching of LTCC vias. CMUT cavities and Au bumps were micromachined on the Si part of the SOI wafer. This high conductive Si was also used as top electrode. Electrical connections between the top and bottom of the CMUT were achieved by Au-Au bonding of wet etched LTCC vias and bumps during anodic bonding. Three key parameters, infrared images, complex admittance plots, and static membrane displacement, were used to evaluate bonding success. CMUTs with a membrane thickness of 2.6 µm were fabricated for experimental analyses. A novel CMUT-IC packaging process has been described following the fabrication process. This process enables indirect packaging of the CMUT and integrated circuit (IC) using a lateral side via of LTCC. Lateral side vias were obtained by micromachining of fabricated CMUTs and used to drive CMUTs elements. Connection electrodes are patterned on LTCC side via and a catheter was assembled at the backside of the CMUT. The IC was mounted on the bonding pad on the catheter by a flip-chip bonding process. Bonding performance was evaluated by measurement of bond resistance between pads on the IC and catheter. This study demonstrates that the LTCC and LTCC side vias scheme can be a potential approach for high density CMUT array fabrication and indirect integration of CMUT-IC for miniature size packaging, which eliminates problems related with direct integration.
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47

Kaneko, Kazuhiro, Seiji Fujita, Hiroshige Adachi, Yasutaka Sugimoto, and Koji Murayama. "Low-temperature co fired ceramic materials with three different dielectric constants." Japanese Journal of Applied Physics 57, no. 11S (October 5, 2018): 11UE04. http://dx.doi.org/10.7567/jjap.57.11ue04.

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48

SAKAMOTO, Sadaaki, Seiji FUJITA, Yasutaka SUGIMOTO, and Nobuhiko TANAKA. "Mechanical strength of low-temperature co-fired ceramic multi-layered substrate." Journal of the Ceramic Society of Japan 125, no. 7 (2017): 569–73. http://dx.doi.org/10.2109/jcersj2.16289.

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49

Sieiro, Javier, Tomás Carrasco Carrillo, Saiyd Ahyoune, Neus Vidal, José María López-Villegas, and Joan Aitor Osorio. "Synthesis of planar inductors in low temperature co-fired ceramic technology." Analog Integrated Circuits and Signal Processing 78, no. 1 (October 31, 2013): 77–86. http://dx.doi.org/10.1007/s10470-013-0214-8.

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50

Hirao, Takahiro, and Shu Hamada. "Novel Multi-Material 3-Dimensional Low-Temperature Co-Fired Ceramic Base." IEEE Access 7 (2019): 12959–63. http://dx.doi.org/10.1109/access.2019.2892654.

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