Numerical simulation of laser/IR assisted micro-embossing

Chunmeng Lu, Yi Je Juang, L. James Lee, David Grewell, Avraham Benatar

研究成果: Paper同行評審

4 引文 斯高帕斯(Scopus)

摘要

The use of hot embossing for fabrication of polymeric microfluidic devices is gaining a great deal of attention in recent years because it is a relatively simple and low-cost process. Conventional microembossing is a relatively slow process that requires both the mold and the polymer substrate to be heated during embossing and cooled before de-embossing. In order to shorten the cycle time, a laser/IR-assisted microembossing (LIME) process was evaluated in this study. Since laser/IR heats the substrate rapidly and locally, the heating and cooling time can be substantially reduced. Experimental results have shown that both shorter cycle time and good replication accuracy can be achieved. In order to better understand this process, a commercially available FEM code DEFORM® was used for process simulation. Because the temperature distribution inside the polymer substrate is affected by the penetration of radiation energy flux from laser/IR heating, the relationship between penetration energy flux and temperature distribution was implemented into the FEM code. Rheological properties of selected amorphous and crystalline polymers were characterized and incorporated into the FEM code. Two different modes of IR embossing were simulated, in which either a transparent mold or transparent substrate was used. The flow patterns observed in the experiments agreed reasonably well with the DEFORM-3D simulation and a quantitative comparison between experimental and simulation results was made using DEFORM-2D.

原文English
頁面1200-1204
頁數5
出版狀態Published - 2004
事件ANTEC 2004 - Annual Technical Conference Proceedings - Chicago, IL., United States
持續時間: 2004 5月 162004 5月 20

Other

OtherANTEC 2004 - Annual Technical Conference Proceedings
國家/地區United States
城市Chicago, IL.
期間04-05-1604-05-20

All Science Journal Classification (ASJC) codes

  • 一般化學工程
  • 聚合物和塑料

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