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Proceedings Paper

Deep x-ray lithography for micromechanics
Author(s): Henry Guckel; Kenneth J. Skrobis; J. Klein; Todd R. Christenson; T. Wiegele
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Paper Abstract

Micromechanical processing tools fall into three basic categories: bulk micromachining of single crystal materials, surface micromachining with deposited films and lateral sacrificial etching, and high aspect ratio processing of polymers and metals. The third category includes LIGA and LIGA-like processing which shares with high aspect ratio processing the need for thick polymer layers with good chemical behavior, acceptable mechanical properties and minimal built-in strain. A decal technique via solvent bonding of thick, essentially strain free polymethyl methacrylate sheets has been used as an alternative to casting and in situ polymerization to avoid the strain difficulty. Final photoresist thicknesses between 100 to 500 micrometers are achieved by precision mechanical milling, prior to x-ray exposure. The photoresist process has been used to produce structures with structural heights to 500 micrometers and run-outs of less than 0.1 micrometers per 100 micrometers of structural height in a LIGA-like processing sequence which combines the LIGA process concept with surface micromachining.

Paper Details

Date Published: 1 February 1994
PDF: 8 pages
Proc. SPIE 2045, Laser-Assisted Fabrication of Thin Films and Microstructures, (1 February 1994); doi: 10.1117/12.167569
Show Author Affiliations
Henry Guckel, Univ. of Wisconsin/Madison (United States)
Kenneth J. Skrobis, Univ. of Wisconsin/Madison (United States)
J. Klein, Univ. of Wisconsin/Madison (United States)
Todd R. Christenson, Univ. of Wisconsin/Madison (United States)
T. Wiegele, Univ. of Wisconsin/Madison (United States)

Published in SPIE Proceedings Vol. 2045:
Laser-Assisted Fabrication of Thin Films and Microstructures
Ian W. Boyd, Editor(s)

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