Negative working photoresists responsive to shorter visible wave

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

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

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.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Negative working photoresists responsive to shorter visible wave does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Negative working photoresists responsive to shorter visible wave, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Negative working photoresists responsive to shorter visible wave will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1320503

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.