Method of making a cellulose acetate butyrate pellicle

Details Method of making a cellulose acetate butyrate pellicle Method of making a cellulose acetate butyrate pellicle

1988-08-31

1989-08-29

Lowe, James

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156160, 156246, 264 17, 264 21, 264311, B29C 4104

Patent

active

048614025

ABSTRACT:
A freely standing thin pellicle film of cellulose acetate buterate is formed by spinning on a rotating substrate. After forming, the film is lifted off of the substrate and secured to a metallic frame. The pellicle is for use in the mid ultraviolet range of 280 to 360 nanometers, but can be used also in the deep ultraviolet range, e.g. wavelengths as low as about 240 nanometers. The pellicle prevents dust particles from being focused on a surface which is to be exposed by the ultraviolet radiation.

REFERENCES:
patent: 2570273 (1951-10-01), Pryor
patent: 4378953 (1983-04-01), Winn

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