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Optimized surface silylation of chemically amplified epoxidized photoresists for micromachining applications

Journal of Applied Polymer Science, ISSN: 0021-8995, Vol: 117, Issue: 4, Page: 2189-2195
2010
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Article Description

We explored the selective wet silylation of noncrosslinked areas of epoxidized photoresists using chlorosilanes. Emphasis was placed on the Si uptake of the epoxy films when controlled low levels of water were incorporated into the silylation solution. Fourier transform infrared measurements and oxygen-plasma resistance data with in situ laser interferometry and multiwavelength ellipsometry are presented. The fine tuning of the moisture level was found to be crucial for the generation of satisfactory and reproducible structures. The optimized version of the process was shown to be useful for epoxy-based dry micromachining. Overall, an attractive positive-tone process is presented as an alternative to the usual negativetone process for commercial epoxy resists. © 2010 Wiley Periodicals, Inc.

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