Development of a micromolding process

This paper presents the simulating and experimental results of a micromolding process for fabrication of threedimensional (3D) microcomponents. The maskless process utilizes a micro electrical discharging system for bulk machining, then finish machining using focused-ion beam to sputter the mold m...

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Main Authors:	Hung, N. P., Yuan, S., Lee, E. C. W., Ali, Mohammad Yeakub
Format:	Conference or Workshop Item
Language:	English
Published:	2001
Subjects:	TS Manufactures
Online Access:	http://irep.iium.edu.my/27139/ http://irep.iium.edu.my/27139/1/035_DTIP-SPIE_France_2001_317-328_Hung.pdf

id	iium-27139
recordtype	eprints
spelling	iium-271392013-09-06T07:42:45Z http://irep.iium.edu.my/27139/ Development of a micromolding process Hung, N. P. Yuan, S. Lee, E. C. W. Ali, Mohammad Yeakub TS Manufactures This paper presents the simulating and experimental results of a micromolding process for fabrication of threedimensional (3D) microcomponents. The maskless process utilizes a micro electrical discharging system for bulk machining, then finish machining using focused-ion beam to sputter the mold microcavity, which is then filled with various types of plastics. Simulation using commercially available software reveals possible problems in micromolding, and the simulation results of microgears (φ100-1000μm diameter, 1:1 aspect ratio) are compared with those from actually molded microgears. Although the software prohibits modeling of a stand-alone microgear with diameter below φ1000μm when using a 2.5D model and φ220μm for a 3D model, the simulation succeeds upon integrating a microgear of φ100μm with a larger base. Selecting the polymers from the built-in data bank, the simulation pinpoints locations for trapped gas, predicts filling time, volumetric shrinkage, uniformity, and distribution of pressure, shear rate, stress.... It correctly predicts underfilling of the cavity when the mold temperature is below a threshold, but fails to locate the weld lines. Minimum channel sizes for proper flow of several plastics are presented, and the mold temperature must be controlled for proper flow of polymer into a microcavity. The measured viscosity of tested polymers compliments the experimental and simulating results. 2001 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/27139/1/035_DTIP-SPIE_France_2001_317-328_Hung.pdf Hung, N. P. and Yuan, S. and Lee, E. C. W. and Ali, Mohammad Yeakub (2001) Development of a micromolding process. In: International Symposium on Design, Test, Integration and Packaging of MEMS/MOEMS 2001, 25-27 April 2001, Cannes, France.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TS Manufactures
spellingShingle	TS Manufactures Hung, N. P. Yuan, S. Lee, E. C. W. Ali, Mohammad Yeakub Development of a micromolding process
description	This paper presents the simulating and experimental results of a micromolding process for fabrication of threedimensional (3D) microcomponents. The maskless process utilizes a micro electrical discharging system for bulk machining, then finish machining using focused-ion beam to sputter the mold microcavity, which is then filled with various types of plastics. Simulation using commercially available software reveals possible problems in micromolding, and the simulation results of microgears (φ100-1000μm diameter, 1:1 aspect ratio) are compared with those from actually molded microgears. Although the software prohibits modeling of a stand-alone microgear with diameter below φ1000μm when using a 2.5D model and φ220μm for a 3D model, the simulation succeeds upon integrating a microgear of φ100μm with a larger base. Selecting the polymers from the built-in data bank, the simulation pinpoints locations for trapped gas, predicts filling time, volumetric shrinkage, uniformity, and distribution of pressure, shear rate, stress.... It correctly predicts underfilling of the cavity when the mold temperature is below a threshold, but fails to locate the weld lines. Minimum channel sizes for proper flow of several plastics are presented, and the mold temperature must be controlled for proper flow of polymer into a microcavity. The measured viscosity of tested polymers compliments the experimental and simulating results.
format	Conference or Workshop Item
author	Hung, N. P. Yuan, S. Lee, E. C. W. Ali, Mohammad Yeakub
author_facet	Hung, N. P. Yuan, S. Lee, E. C. W. Ali, Mohammad Yeakub
author_sort	Hung, N. P.
title	Development of a micromolding process
title_short	Development of a micromolding process
title_full	Development of a micromolding process
title_fullStr	Development of a micromolding process
title_full_unstemmed	Development of a micromolding process
title_sort	development of a micromolding process
publishDate	2001
url	http://irep.iium.edu.my/27139/ http://irep.iium.edu.my/27139/1/035_DTIP-SPIE_France_2001_317-328_Hung.pdf
first_indexed	2023-09-18T20:40:21Z
last_indexed	2023-09-18T20:40:21Z
_version_	1777409323184422912

Development of a micromolding process

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