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Proceedings Paper

Microlens arrays formed by melting photoresist and ion beam milling
Author(s): Xinjian Yi; Xinyu Zhang; Yi Li; Xing-Rong Zhao
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Paper Abstract

Microlens array design and fabrication on silicon and quartz substrates for infrared focal plane applications have been described. A 128 X 128 element silicon microlens array with a pixel size of 60 X 45 micrometers for 3 - 5 micron bandwidth was designed using ray tracing and computer simulation program. A photoresist shap with rectangular arch was prepared by milting process and the shap was transferred onto a silicon substrate using ion beam milling. A 2 X 20 element quartz microlens array has also been fabricated using the same method as the manufacture of silicon microlens array. The microlens array structures were characterized by both the scanning electron microscope and the surface stylus. The experimental results show that the microlens arrays can be effectively formed at the temperature of less than 150 degree(s)C. The use of the microlenses to improve the performance of IR detector arrays is described. A photocurrent gain in excess of 2 has been achieved.

Paper Details

Date Published: 15 March 1998
PDF: 5 pages
Proc. SPIE 3276, Miniaturized Systems with Micro-Optics and Micromechanics III, (15 March 1998); doi: 10.1117/12.302402
Show Author Affiliations
Xinjian Yi, Huazhong Univ. of Science and Technology (China)
Xinyu Zhang, Huazhong Univ. of Science and Technology (China)
Yi Li, Huazhong Univ. of Science and Technology (China)
Xing-Rong Zhao, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 3276:
Miniaturized Systems with Micro-Optics and Micromechanics III
M. Edward Motamedi; Rolf Goering, Editor(s)

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