Research on the Micro Sheet Stamping Process Using Plasticine as Soft Punch

Wang, Xiao; Zhang, Di; Gu, Chunxing; Shen, Zongbao; Liu, Huixia

doi:10.3390/ma7064118

Cited by 7 publications

(4 citation statements)

References 18 publications

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“…With the rapid development of micro-electro-mechanical systems (MEMS), a lot of miniaturized components are widely used for electronics, automobiles, aerospace, and biomedical devices [ 1 , 2 ]. Micro/meso-forming is becoming an important micro-manufacturing method having the potential to fabricate MEMS micro-parts due to its advantageous characteristics for mass production with controlled quality and low cost [ 3 , 4 , 5 ]. The research on micro/meso-forming technology was mainly initiated by M. Geiger [ 6 ] at the beginning of the 1990s and there is evidence that the presence of size effects may lead to a breakdown in these basic manufacturing characteristics when the feature size of the specimen dimensions are less than 1 mm, belonging to the micro/meso-scale.…”

Section: Introductionmentioning

confidence: 99%

Microstructural Evolution at Micro/Meso-Scale in an Ultrafine-Grained Pure Aluminum Processed by Equal-Channel Angular Pressing with Subsequent Annealing Treatment

Zhu

et al. 2015

Materials

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Micro-forming with ultrafine-grained (UFG) materials is a promising direction for the fabrication of micro-electro-mechanical systems (MEMS) components due to the improved formability, good surface quality, and excellent mechanical properties it provides. In this paper, micro-compression tests were performed using UFG pure aluminum processed by equal-channel angular pressing (ECAP) with subsequent annealing treatment. Microstructural evolution was investigated by electron back-scattered diffraction (EBSD) and transmission electron microscopy (TEM). The results show that microstructural evolutions during compression tests at the micro/meso-scale in UFG pure Al are absolutely different from the coarse-grained (CG) materials. A lot of low-angle grain boundaries (LAGBs) and recrystallized fine grains are formed inside of the original large grains in CG pure aluminum after micro-compression. By contrast, ultrafine grains are kept with few sub-grain boundaries inside the grains in UFG pure aluminum, which are similar to the original microstructure before micro-compression. The surface roughness and coordinated deformation ability can be significantly improved with UFG pure aluminum, which demonstrates that the UFG materials have a strong potential application in micro/meso-forming.

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Section: Introductionmentioning

confidence: 99%

Microstructural Evolution at Micro/Meso-Scale in an Ultrafine-Grained Pure Aluminum Processed by Equal-Channel Angular Pressing with Subsequent Annealing Treatment

Zhu

et al. 2015

Materials

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“…Constitutive Model of Copper Foil and Mold in Quasi-static Loading. Due to the plastic deformation in quasi-static loading has a lower plastic strain rate, bilinear kinematic hardening (BKIN) model [8] can be adopted as finite element model of the mold, constrained layer and workpiece, and just the material's Young's modulus, yield strength, shear modulus and Poisson's ratio are needed to be defined. Constitutive Model of the Copper in Dynamic Laser Shock Loading.…”

Section: Materials Constitutive Modelmentioning

confidence: 99%

Numerical Simulation Study of Quasi-Static Loading and Dynamic Loading for Micro Bending Forming of Copper Foil

Zhang

Shen

et al. 2016

KEM

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A variety of micro forming processes has been invented, and the size effects have become a research hotspot at home and abroad. Micro bending molds with different feature sizes were designed. Quasi-static tester loading and dynamic laser shock loading with soft punch for micro bending forming was studied by numerical simulation respectively based on ANSYS implicit analysis and LS-DYNA explicit analysis. The constitutive models of workpiece are bilinear kinematic hardening model and Johnson-cook model respectively. The effects of different loading conditions and feature sizes of the die on the forming depth, equivalent plastic strain and equivalent plastic strain rate were studied. The results of numerical simulation show that, with the increasing of feature size of the mold, the forming depth under two kinds of loading conditions shows a tendency to increase. In dynamic laser shock loading, the equivalent plastic strain and equivalent plastic strain rate of the key position of the bent part would decrease with the increasing of the feature size of the die. While in quasi-static loading, the opposite law is shown. The research shows that, the flexible micro-bending processes with different loading models showed similar size effect. However, compared with quasi-static loading, in dynamic loading, the strain of forming parts is more centralized, and there is a high strain rate and better formability of the workpiece.

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“…The plunger tip is to make contact with the PCB and semiconductor package. A stamping process is applied to manufacture plungers [ 5 ] so that a number of plungers are molded together to improve productivity, as shown in Reference [ 4 ]. After the stamping process, plunger connection arms need to be cut into pieces.…”

Section: Introductionmentioning

confidence: 99%

Understanding of BeCu Interaction Characteristics with a Variation of ns Laser-Pulse Duration

Lee

2018

Materials

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An inspection process using a Spring Contact Probe (SCP) is an essential step in the semiconductor-manufacturing process. Many plungers, which are the main body of the SCP, are manufactured by a stamping process. After the stamping process, mechanical cutting is applied and the plunger body may be damaged. Thus, to improve cut quality and productivity while minimizing body damage, laser spot cutting can be used. To fully utilize this technology, it is necessary to investigate interaction characteristics of beryllium copper (BeCu) during laser spot cutting. Effects of a total irradiated laser-pulse energy (1 mJ~1000 mJ) and pulse duration (100 ns~8 ns) on the material-removal zone, thermal depth, and crater size are examined. The crater size can be affected by the localization of heating dominantly. An incubation model is applied to investigate the correlation between crater size and laser-pulse energy. Surface morphology characteristics such as edge separation, small particles, spatter motion, and soaring-up motion are observed.

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Research on the Micro Sheet Stamping Process Using Plasticine as Soft Punch

Cited by 7 publications

References 18 publications

Microstructural Evolution at Micro/Meso-Scale in an Ultrafine-Grained Pure Aluminum Processed by Equal-Channel Angular Pressing with Subsequent Annealing Treatment

Microstructural Evolution at Micro/Meso-Scale in an Ultrafine-Grained Pure Aluminum Processed by Equal-Channel Angular Pressing with Subsequent Annealing Treatment

Numerical Simulation Study of Quasi-Static Loading and Dynamic Loading for Micro Bending Forming of Copper Foil

Understanding of BeCu Interaction Characteristics with a Variation of ns Laser-Pulse Duration

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