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Optical Engineering

High-throughput plastic microlenses fabricated using microinjection molding techniques
Author(s): Sreeram Appasamy; Weizhuo Li; Se Hwan Lee; Joseph T. Boyd; Chong Hyuk Ahn
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Paper Abstract

A novel fabrication scheme to develop high-throughput plastic microlenses using injection-molding techniques is realized. The initial microlens mold is fabricated using the well-known reflow technique. The reflow process is optimized to obtain reliable and repeatable microlens patterns. The master mold insert for the injection-molding process is fabricated using metal electroforming. The electroplating process is optimized for obtaining a low stress electroform. Two new plastic materials, cyclo olefin copolymer (COC) and Poly IR 2 are introduced in this work for fabricating microlenses. The plastic microlenses have been characterized for their focal lengths that range from 200 µm to 1.9 mm. This technique enables high-volume production of plastic microlenses with cycle times for a single chip being of the order of 60 s.

Paper Details

Date Published: 1 December 2005
PDF: 8 pages
Opt. Eng. 44(12) 123401 doi: 10.1117/1.2149350
Published in: Optical Engineering Volume 44, Issue 12
Show Author Affiliations
Sreeram Appasamy, Univ. of Cincinnati (United States)
Weizhuo Li, Univ. of Cincinnati (United States)
Se Hwan Lee, Univ. of Cincinnati (United States)
Joseph T. Boyd, Univ. of Cincinnati (United States)
Chong Hyuk Ahn, Univ. of Cincinnati (United States)

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