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Journal articles on the topic 'Micro-holes'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Udroiu, Razvan. "A Quality Analysis of Micro-Holes Made by Polymer Jetting Additive Manufacturing." Polymers 16, no. 1 (2023): 32. http://dx.doi.org/10.3390/polym16010032.

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Material jetting technology is gaining popularity, especially in polymer science, because of their high accuracy for additive manufacturing (AM) products. This paper aims to investigate the quality of micro-holes that are oriented in three basic directions, and manufactured by the material jetting AM process. This paper proposes a novel methodology to evaluate the accuracy of micro-holes features by using a transparent artifact. A test artifact with horizontal and vertical micro-holes in it, with industrial applications, was designed. Micro-holes were placed on planar and curve surfaces. Sampl

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2

Wu, Yung-Yi, Tzu-Wei Huang, and Dong-Yea Sheu. "Desktop Micro-EDM System for High-Aspect Ratio Micro-Hole Drilling in Tungsten Cemented Carbide by Cut-Side Micro-Tool." Micromachines 11, no. 7 (2020): 675. http://dx.doi.org/10.3390/mi11070675.

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Tungsten cemented carbide (WC-Co) is a widely applied material in micro-hole drilling, such as in suction nozzles, injection nozzles, and wire drawing dies, owing to its high wear resistance and hardness. Since the development of wire-electro-discharge grinding (WEDG) technology, the micro-electrical discharge machining (micro-EDM) has been excellent in the process of fabricating micro-holes in WC-Co material. Even though high-quality micro-holes can be drilled by micro-EDM, it is still limited in large-scale production, due to the electrode tool wear caused during the process. In addition, th

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3

Agafonova, Vera. "Analysis of micro-holes shape in a textile terminal using optical microscopy." MATEC Web of Conferences 265 (2019): 01018. http://dx.doi.org/10.1051/matecconf/201926501018.

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Currently, development and improvement of ventilation and air conditioning systems efficiency is related with the use of new devices for air transportation and distribution. These include micro perforated air distributors made of textile which are installed both at the level of the indoor working area and directly near the workplace. Air terminals of this type are made of polymer composite material – fabric based on synthetic fibers. To make such a fabric, modern laser technology to produce micro-holes is used which allows burning in the fabric holes of a given diameter and pitch with melted e

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4

Wang, Linfang, Lijuan Zheng, Cheng yong Wang, et al. "Experimental study on micro-drills wear during high speed of drilling IC substrate." Circuit World 40, no. 2 (2014): 61–70. http://dx.doi.org/10.1108/cw-11-2013-0048.

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Purpose – Compared with the traditional printed circuit board (PCB) drilling process, the technology of drilling IC substrate is facing more problems, such as much smaller hole diameter, more intensive hole space, thinner sheet and more complicated materials are drilled in process. Moreover, the base material of IC substrate is different from traditional PCB, more kinds of fillers added in IC substrate which make the drill worn seriously during drilling process. Micro-drills wear and micro holes quality are the most important questions when drilling IC substrate so far. Wear morphology of micr

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5

Zhu, Guo Zheng, Ji Cheng Bai, Yong Feng Guo, Peng Ju Hou, and Chao Jiang Li. "Research on Micro EDM Machine Tool for Machining Micro Array Holes." Advanced Materials Research 472-475 (February 2012): 2401–4. http://dx.doi.org/10.4028/www.scientific.net/amr.472-475.2401.

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As demands for the micro array holes in modern industry and the characteristics of micro Electrical Discharge Machining (micro EDM), a new type micro EDM machine tool used to machine micro array holes was designed and manufactured. The machine tool contains following systems: the mechanism system, the control system, the pulse generator system and other auxiliary systems. Each system was studied respectively. Base on a large number of experiments, finally, a sample with 256 array holes was processed by the machine tool. The diameter of single hole is 45µm and precision of the holes is ±1µm. Th

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6

Zhang, Lei, Xiao Wen Cao, Deng Peng Huang, Dong Wei Ran, Shuo Tian, and Hui Chao Sun. "Investigation of Micro Holes Fabricated by Femtosecond Laser on S136." Applied Mechanics and Materials 727-728 (January 2015): 205–8. http://dx.doi.org/10.4028/www.scientific.net/amm.727-728.205.

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Femtosecond laser is now widely used in micro holes drilling because of its unique advantages, such as high efficiency, high precision and non-contact. Femtosecond laser is the best choice to fabricate micro holes. This paper makes a systematic study of the influence of laser power and number of pulses on diameter and depth of micro holes on S136 die steel through the focusing lens with focal length of 35 cm. A series of high-precision micro holes with different diameter and depth are fabricated. The relationship between the dimension of fabricated micro holes and the process parameters is det

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7

Li, Han Song, Dong Meng, Guo Qian Wang, and Yong Bin Zeng. "Electro-Chemical Micro Drilling by Micro-Spherical Electrode." Advanced Materials Research 1089 (January 2015): 324–30. http://dx.doi.org/10.4028/www.scientific.net/amr.1089.324.

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Manufacture of micro holes in difficult-to-machine material is very difficult, electro-chemical machining (ECM) is one of the more appropriate approach. However, micro holes fabricated using ECM can have different diameters at the entrances and exits and such tapering effect is not localized. In this work, a new ECM method named electro-chemical micro drilling (ECMD) for machining high quality straight micro holes in difficult-to-machine material was introduced, and the micro-spherical electrode fabricated by a hybrid technique combining micro-ECM with one pulse electro discharge (OPED) was us

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8

Cai, Hui Tao, and Yong Liu. "Research on Optical Feature Recognition Technology of Multiple Micro-Holes." Advanced Materials Research 852 (January 2014): 373–77. http://dx.doi.org/10.4028/www.scientific.net/amr.852.373.

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A rapid quality detection system for multiple micro-holes fabricated by electrochemical machining (ECM) is proposed by studying on the optical features of multiple micro-holes. First, the edge of multiple micro-holes is detected exactly with the digital image processing techniques. Second, the multiple micro-holes are recognized through image skeleton extraction and region segmentation algorithm. Then, the least square circle fit arithmetic; the new roundness measurement algorithm and the surface roughness measurement method are synthetically used in the processing of geometric feature recogni

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9

Yuan, Chenhu, Zenggan Bian, Yue Cao, et al. "Fabrication of Micro-Holes with High Aspect Ratios in Cf/SiC Composites Using Coaxial Waterjet-Assisted Nanosecond Laser Drilling." Micromachines 16, no. 7 (2025): 811. https://doi.org/10.3390/mi16070811.

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In the present study, the coaxial waterjet-assisted nanosecond laser drilling of micro-holes in Cf/SiC composites, coupled with nanosecond laser drilling in air for fabricating micro-holes with high aspect ratios, were investigated. The surface morphology, reaction products, and micro-hole shapes were thoroughly examined. The results reveal that, for the coaxial waterjet-assisted nanosecond laser drilling of micro-holes in the Cf/SiC composite, the increasing of waterjet velocity enhances the material removal rate and micro-hole depth, but reduces the micro-hole diameter and taper angle. The c

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10

Jia, Bao Xian, Dong Sheng Wang, Zhen Long Wang, and Wan Sheng Zhao. "Experiment Study of Combining Micro EDM with USM." Key Engineering Materials 375-376 (March 2008): 248–52. http://dx.doi.org/10.4028/www.scientific.net/kem.375-376.248.

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Experiments of combining micro EDM with USM are carried out to enhance the machining ability and flexibility of the micro EDM, improve the machining state, and increase the productivity and aspect ratio of the micro holes. Basing on RC pulse power supply and workpiece vibration, the micro holes are drilled. The results of comparing experiments indicate that in the processes of both micro EDM without USM and micro EDM with USM, the machining velocity and the wear of the electrode increase with the increase of open voltage and loop capacitance. The experiment results of amplitude influencing on

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11

Chen, Lan. "Research the Molybdenum Alloy Micro EDM Micro-Holes." Advanced Materials Research 411 (November 2011): 315–18. http://dx.doi.org/10.4028/www.scientific.net/amr.411.315.

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In the field of micromachining, micro electrical discharge machining (MEDM) is an important and perfect machining method for high rigid or high wearable materials, which is better than traditional methods of machining. MEDM technology is used to manufacture on-line electrodes and then minimum micro shafts with diameter of 15μm were made with these electrodes. A series of different micro-holes (e.g. Φ40μm、Φ50μm、Φ60μm) on pieces of molybdenum were manufactured with different parameters. Wastage of electrode rule was also studied.

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12

Ding, Haifeng, and Zichun Hao. "Detecting Bypassing Micro Black Holes." Journal of Physics: Conference Series 2012, no. 1 (2021): 012131. http://dx.doi.org/10.1088/1742-6596/2012/1/012131.

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13

Kao, Chen-Chun, and Albert J. Shih. "Form measurements of micro-holes." Measurement Science and Technology 18, no. 11 (2007): 3603–11. http://dx.doi.org/10.1088/0957-0233/18/11/045.

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14

XIE, B. C., J. G. LIU, and H. X. CUI. "INVESTIGATION OF DEBRIS PARTICLES DISTRIBUTION IN ELECTRICAL DISCHARGE MACHINING OF MICRO-HOLES ARRAY." Digest Journal of Nanomaterials and Biostructures 15, no. 1 (2020): 15–23. http://dx.doi.org/10.15251/djnb.2020.151.15.

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Micro-holes array and micro-electrodes array are widely used in biomedical industry, aerospace industry and micro-electromechanical systems. The machining of micro-holes array is a difficult problem for traditional machining technology. Currently electrical discharge machining technology (EDM) is an alternative machining technology for the fabricating of micro-holes array in high strength and hardness of metal material because of it is free from mechanical force. However, distribution and concentration of debris particles in the discharge gap easily leads to the intensive distribution of disch

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15

Zhu, Xiao Yang, Li Ya Hou, Li Zhu, Wei Yi Zhang, and Mei Yang. "Fabrication of Shape Controllable Micro-Lens Arrays by Drop on Demand Printing on the Glass Micro-Holes Arrays." Advanced Materials Research 887-888 (February 2014): 426–31. http://dx.doi.org/10.4028/www.scientific.net/amr.887-888.426.

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A simple and easy method is demonstrated for the fabrication of the shape controllable micro-lenses, which are widely used in biomedical systems for improving the image quality as their ability to efficiently focus light into the devices. The micro-lenses were drop on demand printed on the glass micro-holes based on a simple drop on demand printing technique. The shape controllable micro-lenses with a fixed diameter resulting from boundary confinement effect of the micro-holes and the surface wetting conditions are controlled by printing different numbers of drops per micro-lens. The influence

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16

Yu, Puliang, Jiong Lu, Qiang Luo, Guanghui Li, and Xianxiong Yin. "Optimization Design of Aerostatic Bearings with Square Micro-Hole Arrayed Restrictor for the Improvement of Stability: Theoretical Predictions and Experimental Measurements." Lubricants 10, no. 11 (2022): 295. http://dx.doi.org/10.3390/lubricants10110295.

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Aerostatic bearings are widely used in ultra-precision manufacturing equipment as a crucial support component. However, turbulent vortices in the recess can induce micro-vibration of the aerostatic bearing, which can severely affect stability. To further suppress the formation of turbulent vortices and reduce the micro-vibration, an aerostatic bearing with a square micro-hole arrayed restrictor (SMAR) was designed and the influences of structural parameters of the SMAR on its static and dynamic performance were investigated using numerical simulations and experiments. The transient flow charac

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17

Lian, Manqun, Xinke Feng, Bin Xu, Lianyu Fu, and Kai Jiang. "Simulation of Temperature Field in Micro-EDM Assisted Machining of Micro-Holes in Printed Circuit Boards." Micromachines 13, no. 5 (2022): 776. http://dx.doi.org/10.3390/mi13050776.

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High-speed mechanical drilling based on the micro-bit is the mainstream process technology for machining micro-holes in the printed circuit board (PCB). However, the above process to obtain PCB micro-holes is prone to defects, such as hole burrs and nail heads in the hole. In this paper, the micro electrical discharge machining (micro-EDM) was used as an auxiliary means for machining PCB micro-holes to effectively eliminate the defects such as hole burrs and nail heads. However, during the process of micro-EDM, the micro-bit will be gradually worn, thus negatively affecting the machining quali

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18

Liu, Yong, and Shao Fu Huang. "Experimental Study on Electrochemical Drilling of Micro Holes with High Aspect Ratio." Advanced Materials Research 941-944 (June 2014): 1952–55. http://dx.doi.org/10.4028/www.scientific.net/amr.941-944.1952.

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It is a difficult problem to fabricate deep and micro holes on the difficult-to-cut metals in the field of aviation manufacturing. The experimental research of electrochemical drilling technology with high-speed micro electrode for fabricating deep micro holes is carried out. The influences of rotary speed on machining precision and stability are studied. The holes, which the diameter is about 400μm, the aspect ratio is more than 10, and have steep wall and sharp edges were fabricated successfully on the nickelbase superalloys on self-developed high-precision micro-electrochemical machining sy

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19

Zheng, Lijuan, Shuzhan Lin, Huijuan Lu, et al. "Characterization of Micro-Holes Drilled Using a UV Femtosecond Laser in Modified Polyimide Flexible Circuit Boards." Micromachines 15, no. 9 (2024): 1078. http://dx.doi.org/10.3390/mi15091078.

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Modified polyimide (MPI) flexible printed circuits (FPCs) are used as chip carrier boards. The quality of the FPC directly affects the reliability of the integrated circuit. Furthermore, micro-holes are critical components of FPCs. In this study, an ultraviolet (UV) femtosecond laser is used to drill micro-holes in double-layer flexible circuit boards with MPI as the substrate. The morphology of the micro-hole wall in the copper foil and MPI layer is observed, and the effects of the laser processing parameters on the diameter and depth of the micro-holes are analyzed. The drilling process and

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20

Liu, Li Ping, Bin Lin, and Feng Zhou Fang. "Study on a Novel Adaptive Force Control Table Employed for Rotary Ultrasonic Drilling." Applied Mechanics and Materials 80-81 (July 2011): 1027–31. http://dx.doi.org/10.4028/www.scientific.net/amm.80-81.1027.

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A novel adaptive force control table for rotary ultrasonic machine tool was developed for processing micro holes. The adaptive force control table, a mechanical balancing device by which the load can be adaptively adjusted without numerical control was adopted as an attachment in an ultrasonic machine tool. To verify the performance, micro holes were drilled on SiC workpiece. The drilling force, tool wear and profiles of these machined micro holes were investigated. According to the experimental results, it is confirmed that the newly developed table attached on the ultrasonic machine tool is

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21

Jou, D., M. Sciacca, and M. S. Mongiovì. "Thermal duality and thermodynamics of micro black holes." International Journal of Modern Physics D 24, no. 11 (2015): 1550087. http://dx.doi.org/10.1142/s021827181550087x.

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Starting from a generalized black hole entropy with logarithmic area corrections, in this paper we obtain (for positive value of the coefficient of the correction term) a generalized equation of state for black holes with two dual branches. In one of them (the usual one for macro black holes) T ≃ 1/M, with T temperature and M mass. In the other one, for micro black holes, instead, T ≃ M. We compare the equilibrium and stability between macro black holes and electromagnetic radiation in a finite box with reflecting walls, with the dual situation corresponding to micro black holes and cosmic str

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22

Nagasu, Yoshinori, Noboru Nakayama, Makoto Otani, Kazunori Itoh, Keigo Oguchi, and Kakumasa Eguchi. "Micro-Hole Diameter Inspection Using Audible Sound." Key Engineering Materials 656-657 (July 2015): 755–60. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.755.

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This paper presents a method for inspecting micro-holes with diameters of less than 100 μm using audible sound. The inspection system measures the micro-hole diameter by comparing two sound signals. Fluid flow through micro-holes affects the performance of products such as CO gas sensor parts, microphone filters and fuel injection plates. Therefore, if the flow rate of fluid passing through micro-holes is accurately assessed by an inspection system, the performance of a product can be guaranteed.

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23

Chaubey, Sujeet Kumar, and Kapil Gupta. "Developing Meso and Microholes by Spark-Erosion Based Drilling Processes: A Critical Review." Micromachines 13, no. 6 (2022): 885. http://dx.doi.org/10.3390/mi13060885.

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The increased demand for miniature components has drawn the attention of researchers, engineers, and industry users to manufacture precision micro and mesoholes on foils, sheets, and plates made from a variety of engineering materials. These days, micro-drilling is extensively being adopted as a fundamental operation in all kinds of smart manufacturing industries to make different types of microholes, such as through holes, blind holes, and taper holes on micro-parts and components. Drilled holes with a diameter of less than 1 mm are referred to as microholes, while drilled holes whose diamete

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24

Cho, Minhaeng. "Tribological Synergism of Anodic Aluminum Oxide Surface Containing Micro-Holes and Nanopores under Lubricated Reciprocation." Lubricants 11, no. 12 (2023): 533. http://dx.doi.org/10.3390/lubricants11120533.

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Micro-drilled aluminum surfaces containing micro-holes were anodized to produce nanopores over the machined and lapped surfaces. The anodized nanopores had an approximate diameter of 30–40 nm and a depth distribution of 20–30 μm from the surface. The diameter and depth of the machined micro-holes were 125 μm and 300 μm, respectively. Anodization itself did not change the surface roughness because the nanopores were very small. Ball-on-disk reciprocating tests were performed under lubricated conditions for 2 h using a frequency of 2 Hz, a load of 2 N, and a travel distance of 5 mm. The results

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25

Ekmekci, Bülent, Atakan Sayar, Tahsin Tecelli Öpöz, and Abdulkadir Erden. "Characteristics of Surface Damage in Micro Electric Discharge Machining of Micro Holes." Advanced Materials Research 83-86 (December 2009): 688–95. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.688.

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Micro Electric Discharge Machining is mostly used micromachining technique for manufacturing of micro holes and mini cavities. It is a thermal material removal process achieved by application of recursive electrical sparks between two conductive materials immersed in dielectric liquid. There are many electrical and technological parameters, which are effective in the machining characteristics and machined material surface integrity. In this study, effects of pulse energy on characteristics of surface damage in micro electric discharge machining of micro holes are investigated. To observe the i

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26

Wang, Ming Huan, Qiao Fang Zhang, C. Y. Yao, and Wei Peng. "Fabrication of Micro-Structures by Micro-ECM." Advanced Materials Research 69-70 (May 2009): 229–33. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.229.

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The machining of materials on microscopic scales is considered to be great importance to a wide variety of fields. Electrochemical Micro-machining (EMM) appears to be promising to machine the micro-structures in future due to the material is dissolved at the unit of ion. This paper is focused on developing a micro electrochemical machining system in which the micro-structures such as micro-cylinder, multiple micro-electrodes, micro-holes and micro-slot were processed. The micro-electrodes were prepared in a precisely controlling the electrochemical etching process. Mathematical model controlli

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27

Zheng, Lijuan, Chengyong Wang, Xin Zhang, et al. "The tool-wear characteristics of flexible printed circuit board micro-drilling and its influence on micro-hole quality." Circuit World 42, no. 4 (2016): 162–69. http://dx.doi.org/10.1108/cw-08-2015-0040.

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Purpose Micro-holes are drilled and plated in flexible printed circuit boards (FPCs) for connecting circuits from different layers. More holes, with diameters smaller than 0.3 mm, are required to be drilled in smaller areas with flexible circuits’ miniaturization. The micro-hole quality of micro-drilling is one of the biggest issues of the flexible circuit manufacturers’ production. However, it is not easy to control the quality of micro-holes. The purpose of this study was to conduct research on the tool wear characteristics of FPC drilling process and its influence on micro-hole quality to i

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28

Fuji, Saburo. "Injection Molding of Multi-micro Holes." Seikei-Kakou 10, no. 4 (1998): 252–57. http://dx.doi.org/10.4325/seikeikakou.10.252.

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29

Xia Bo, 夏博, 姜澜 Jiang Lan, 王素梅 Wang Sumei, 闫雪亮 Yan Xueliang, and 刘鹏军 Liu Pengjun. "Femtosecond Laser Drilling of Micro-Holes." Chinese Journal of Lasers 40, no. 2 (2013): 0201001. http://dx.doi.org/10.3788/cjl201340.0201001.

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30

Casadio, Roberto, and Benjamin Harms. "Microcanonical Description of (Micro) Black Holes." Entropy 13, no. 2 (2011): 502–17. http://dx.doi.org/10.3390/e13020502.

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BLEICHER, MARCUS, PIERO NICOLINI, MARTIN SPRENGER, and ELIZABETH WINSTANLEY. "MICRO BLACK HOLES IN THE LABORATORY." International Journal of Modern Physics E 20, supp02 (2011): 7–14. http://dx.doi.org/10.1142/s0218301311040529.

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The possibility of creating microscopic black holes is one of the most exciting predictions for the LHC, with potentially major consequences for our current understanding of physics. We briefly review the theoretical motivation for micro black hole production, and our understanding of their subsequent evolution. Recent work on modelling the radiation from quantum-gravity-corrected black holes is also discussed.

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32

Scardigli, Fabio. "Gravity coupling from micro-black holes." Nuclear Physics B - Proceedings Supplements 88, no. 1-3 (2000): 291–94. http://dx.doi.org/10.1016/s0920-5632(00)00788-x.

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33

Advatec. "Ultrasonic test blocks with micro holes." NDT International 23, no. 1 (1990): 57. http://dx.doi.org/10.1016/0308-9126(90)91590-p.

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Advatec. "Ultrasonic test blocks with micro holes." NDT & E International 23, no. 1 (1990): 57. http://dx.doi.org/10.1016/0963-8695(90)90854-c.

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Tong, Hao, Yong Li, and Long Zhang. "Swing Mechanism for Micro EDM Drilling of Fuel Jet Nozzles." Advanced Materials Research 591-593 (November 2012): 391–95. http://dx.doi.org/10.4028/www.scientific.net/amr.591-593.391.

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To improve the spray effects of fuel-jet nozzles, the deep micro-holes of the nozzles require taper angle 0°-2° along jet direction. In this paper, a taper-swinging mechanism (TSM) is designed to swing a taper angle on an electrode wire for micro electrical discharge machining (EDM) of micro-taper holes. The features of TSM are as follows. First, the electrode wire and its guider are swung simultaneously during the micro-EDM drilling. Second, the center of a fixed sphere as the taper vertex is positioned on the surface of workpiece. Thirdly, non-rotating of the electrode wire and the fixed cen

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Tam, H. Y., W. Jiang, and K. L. Chan. "A Process Investigation for Micro-EDM Fabrication of through Holes in Thin Copper Sheets." Advanced Materials Research 264-265 (June 2011): 1376–82. http://dx.doi.org/10.4028/www.scientific.net/amr.264-265.1376.

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This paper reports a study of a micro-EDM process to fabricate micro-through holes in 30 micron thick copper sheets. Circular holes in various micro-sizes were produced by a micro-EDM machine and with tungsten electrodes. Scanning electron microscopy (SEM) and energy dispersion spectroscopy (EDX) were used to identify the influence of electric sparks on the quality of the fabricated features by careful study of resulted cavitation, adhesion of debris, and re-solidification of molten materials, etc. Such analyses allow the generalization of the relevant fabrication mechanisms. In addition, meas

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Li, Zhi Yong, and Zong Wei Niu. "Process Parameter Optimization and Experimental Study of Micro-Holes in Electrochemical Micromachining Using Pulse Current." Advanced Materials Research 135 (October 2010): 293–97. http://dx.doi.org/10.4028/www.scientific.net/amr.135.293.

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Electrochemical micro-machining (EMM) has become one of the main machining methods for production of miniaturized parts and components. Utilizing a developed EMM set-up, sets of experiments have been carried out to investigate the influences of some of the predominant electrochemical process parameters such as pulse frequency, feed rate of tool, machining voltage and ultrasonic frequency on the machining accuracy of micro-holes. According to the present investigation, the most effective zone of pulse on time and ultrasonic frequency can be considered as 15-50μs and 26KHZ, respectively, which c

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Jia, Bao Xian, Wan Sheng Zhao, Fang Sun, and Zhen Long Wang. "Experimental Study of Micro Holes Machining by USM." Materials Science Forum 532-533 (December 2006): 21–24. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.21.

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It is necessary to drill micro holes in some hard brittle materials. Comparing with electro discharge machining, electrochemical machining and laser machining, the ultrasonic machining (USM) has unique advantages in hard brittle materials machining. The aim of this paper is to present experimental work that has been done in micro holes machining by micro USM. The main machining mechanisms of USM are discussed. It is pointed out that the contributions of each mechanism to material removal rate are different in different cases. By using micro USM with workpiece vibration and tool feeding in cons

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Hara, Keisuke, Atsushi Asahi та Hiromi Isobe. "Ultrasonically Assisted Micro Drilling for Acrylic Resin μ-TAS". Key Engineering Materials 625 (серпень 2014): 607–12. http://dx.doi.org/10.4028/www.scientific.net/kem.625.607.

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Recently, technologies for medical inspection have been increasing rapidly. In biomedical industry, a demand of Micro Total Analysis System (μ-TAS) has been growing which used in automatically inspection for chemical analysis. The μ-TAS have micro passageway which is constructed by many fine micro holes. Final polishing by skilled workers are carried out after drilling to obtain smooth surface of holes. Because new manufacturing technique is required instead of skilled workers, it increases productivity and cost performance of the μ-TAS. Drilling technique with low temperature environment arou

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Song, Ai Ping, Shang Gao, Jian Wei Huang, and Li Feng Zhang. "Antifriction Effect of Micro-Deep Holes for Higher Pair Components." Applied Mechanics and Materials 43 (December 2010): 391–96. http://dx.doi.org/10.4028/www.scientific.net/amm.43.391.

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Higher pair contacting components is worn more severely than lower pair contacting components due to the larger contact stress on the contact line. To improve antifriction of higher pair contacting components, the paper proposes a new method by which a large number of micro-deep holes are fabricated on the surface of the contacting component. When higher pair operates, contact stress near the contact line will cause obvious elastic deformation and the volume of the micro-deep holes near the contact line will change, resulting in absorbing oil and squeezing oil. Then an oil film with certain pr

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Rashid, Asif, Azat Bilal, Chong Liu, M. P. Jahan, Didier Talamona, and Asma Perveen. "Effect of Conductive Coatings on Micro-Electro-Discharge Machinability of Aluminum Nitride Ceramic Using On-Machine-Fabricated Microelectrodes." Materials 12, no. 20 (2019): 3316. http://dx.doi.org/10.3390/ma12203316.

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The objective of this study is to investigate the feasibility of machining micro-holes on the non-conductive Aluminum Nitride (AlN) ceramics using micro-electro-discharge machining (EDM) process by exploiting various coating techniques. Although ceramics possess excellent mechanical properties under compressive load condition and superior thermal properties, machining of microscale features on ceramics remains challenging due to the extreme brittleness associated with ceramics. Due to the involvement of higher cutting force and tool wear issue, conventional machining process appears to be unsu

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Miura, Kohichi, Syou Satoh, Takazo Yamada, and Hwa Soo Lee. "Effect of Machining of Small Tools by Means of Focused Ion Beam." Advanced Materials Research 565 (September 2012): 588–93. http://dx.doi.org/10.4028/www.scientific.net/amr.565.588.

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Micro holes which diameters are more than 0.1 mm are mechanically machined. However since the ideal sharp cutting edges are difficult to be made in micro drills, fine geometrical shape of micro holes is difficult to be obtained. In this study, the influence of the geometrical shape of cutting edge is experimentally discussed. In order to carry out experimental evaluation, focused ion beam is used to make the geometrical shapes of micro drills.

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Xu, Bin, Xin-ke Feng, Xiao-yu Wu, et al. "Micro-EDM-assisted machining micro-holes in printed circuit board." International Journal of Advanced Manufacturing Technology 113, no. 3-4 (2021): 1191–201. http://dx.doi.org/10.1007/s00170-021-06709-z.

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SATO, Takeo, Takeshi MIZUTANI, Takeshi MASAKI, and Masaki YAMAMOTO. "Precision machining of micro-holes and micro-punches with EDM." Journal of the Japan Society for Precision Engineering 55, no. 6 (1989): 989–93. http://dx.doi.org/10.2493/jjspe.55.989.

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Chern, Gwo-Lianq, and Sen-De Wang. "Punching of noncircular micro-holes and development of micro-forming." Precision Engineering 31, no. 3 (2007): 210–17. http://dx.doi.org/10.1016/j.precisioneng.2006.09.001.

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Das, Alok Kumar, and Partha Saha. "Machining of circular micro holes by electrochemical micro-machining process." Advances in Manufacturing 1, no. 4 (2013): 314–19. http://dx.doi.org/10.1007/s40436-013-0042-1.

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Wang, Feng, Jian Jun Luo, Ming Li, and Yue Deng. "A Study on the Technical Method of Drilling Micro Holes on New CMC-SiC with Femtosecond Laser." Applied Mechanics and Materials 543-547 (March 2014): 3924–30. http://dx.doi.org/10.4028/www.scientific.net/amm.543-547.3924.

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To solve the difficulties of processing micro holes on the CMC-SiC, femtosecond laser was used as the drilling tool in this paper. And a new type of laser beam scanning module was studied. The study confirms the feasibility of finishing the processing of micro holes whose diameter is less than 2mm on the new CMC-SiC. And the preliminary optimization of processing parameters is completed. According to the experimental results, the important factors affecting the quality of the micro holes were analyzed, and the factors are the processing power and the scanning speed. The results also show that

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JOU, D., M. S. MONGIOVI, and M. SCIACCA. "A DUALITY-INVARIANT EINSTEIN–PLANCK RELATION AND ITS CONSEQUENCES ON MICRO BLACK HOLES." International Journal of Modern Physics D 23, no. 02 (2014): 1450018. http://dx.doi.org/10.1142/s0218271814500187.

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We discuss the consequences of a duality-invariant Einstein–Planck (DIEP) relation on the equation of state of micro black holes. The results are analogous to those obtained from the "world-crystal" model, but with some significative differences, as for instance a limiting vanishing value for temperature for very small black holes. The model leads to a total evaporation of micro black holes but with the final stage being very slow.

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Wang, Yu Kui, Xiao Long He, Zhen Long Wang, and Hui Chen. "Electrochemical Drilling of Micro Holes with Flatted Electrode." Applied Mechanics and Materials 148-149 (December 2011): 1335–38. http://dx.doi.org/10.4028/www.scientific.net/amm.148-149.1335.

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In this paper an electrochemical drilling method for machning micro holes using a flatted electrode instead of the traditional cylindrical electrode is presented. Both electrochemical drilling processes, in which the cylindrical electrode and the flatted electrode were used respectively, were introduced under same machining conditions. The taper of the micro holes between entrance and exit was reduced and machining speed was improved when the flatted electrode was used compare with cylindrical electrode. The flow field simulation was taken out to investigate the reasons for micro holes electro

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Zhang, Honghao, Lintao Hu, Qinghua Liu, et al. "Co-oscillating electrochemical vector hydrophone based on microelectrodes with deep micro-channels." Journal of Physics: Conference Series 2982, no. 1 (2025): 012008. https://doi.org/10.1088/1742-6596/2982/1/012008.

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Abstract This paper reports a MEMS-based co-oscillating electrochemical vector hydrophone based on two microelectrode chips with deep micro-channels. Micro-channels and flow holes are obtained simultaneously by one step of deep reactive ion etching. By skillfully taking advantage of the Aspect Ratio Dependent Etching(ARDE), flow holes penetrating the silicon wafer and the micro-channels surrounding the flow holes will be obtained. When sputtering the metal micro-electrode, due to the micro-channels’ depth and taking advantage of the limitation of the angle of incidence of sputtering, the catho

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