The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 02, 1994
Filed:
Apr. 25, 1991
Applicant:
Inventor:
Hans J Merrem, Seeheim, DE;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03F / ; G03C / ;
U.S. Cl.
CPC ...
430191 ; 430165 ; 430192 ; 430510 ;
Abstract
Addition of compounds of formula I ##STR1## in which R.sup.1 to R.sup.4 are each hydroxyl or C.sub.1-6 -alkoxy and R.sup.5 to R.sup.10 are each hydrogen or C.sub.1-6 -alkyl, to positive photoresist compositions based on a diazoquinone/novolak resin effectively suppresses stray radiation and halation effects in corresponding photoresist coatings, in particular if these coatings have been applied to highly reflective substrates.