Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Patent
1986-11-21
1988-05-10
Brammer, Jack P.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
430286, 430287, 430919, 430920, 522 25, G03C 176
Patent
active
047435291
ABSTRACT:
A negative working photoresist is disclosed responsive to imaging radiation of a visible wavelength shorter longer than 550 nm comprised of an organic film forming component containing ethylenic unsaturation and capable of selective immobilization by addition at the site of ethylenic unsaturation and activator and photosensitizer coinitiators for ethylenic addition. The activator is an azinium salt activator, and the photosensitizer is a dye having its principal absorption peak at a wavelength shorter than 550 nm and having a reduction potential which in relation to that of said azinium salt activator is at most 0.1 volt more positive. When the dye is a keto dye, it exhibits when excited by imaging radiation an intersystem crossing efficiency to a triplet state of less than 10 percent.
REFERENCES:
patent: Re27922 (1974-02-01), Heseltine et al.
patent: Re27925 (1974-02-01), Jenkins et al.
Specht, Martic, and Farid, "A New Class of Triplet Sensitizers", Tetrahedron, vol. 38, pp. 1203-1211, 1982.
Research Disclosure, vol. 200, Dec. 1980, 20036.
Farid Samir Y.
Haley Neil F.
Moody Roger E.
Specht Donald P.
Brammer Jack P.
Eastman Kodak Company
Thomas Carl O.
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