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Proceedings Paper

Design and fabrication of microlens and spatial filter array by self-alignment
Author(s): Ren Yang; Kin Foong Chan; Zhiqiang Feng; Wenhui Mei
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Paper Abstract

For typically small volume production of MEMS, MOEMS, fine feature PCB, high density chip packaging and display panels, especially for lab tests, low cost and the capability to change the original design easily and quickly are very important for customers and researchers. BALL Semiconductor Inc.'s Maskless Lithography Systems (MLS) feature the Digital Mirror Device (DMD) as the pattern generator to replace photo-masks. This can remove masks from UV lithography, and dramatically reduce the running cost and save time for lab tests and small volume production. At Ball Semiconductor Inc, 1.5μm line/space, 10μm line/space, and 20μm line/space Maskless Lithography Systems were developed. In our MLS, an 848×600 microlens and spatial filter array (MLSFA) was used to focus the light and to filter the noise. In order to produce smaller line-space than 16μm the MLSFA was used to get smaller UV light pad (compared with the SVGA DMD’s micro-mirror: 17μm×17μm) and to filter the noise produced from the DMD, optical lens system, and micro lens array. This MLSFA is one of the key devices for our Maskless Lithography System, and determines the resolution and quality of maskless lithography. A novel design and fabrication process of a single-package MLSFA for our Maskless Lithography System will be introduced. To avoid problems produced by misalignment between a two-piece spatial filter and microlens array, MEMS processing is used to integrate the microlens array with the spatial filter array. In this paper, the self-alignment method used to fabricate exactly matched MLSFA will be presented.

Paper Details

Date Published: 20 January 2003
PDF: 11 pages
Proc. SPIE 4985, MOEMS Display and Imaging Systems, (20 January 2003); doi: 10.1117/12.472865
Show Author Affiliations
Ren Yang, Ball Semiconductor Inc. (United States)
Kin Foong Chan, Ball Semiconductor Inc. (United States)
Zhiqiang Feng, Ball Semiconductor Inc. (United States)
Wenhui Mei, Ball Semiconductor Inc. (United States)

Published in SPIE Proceedings Vol. 4985:
MOEMS Display and Imaging Systems
Hakan Urey, Editor(s)

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