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:
Apr. 24, 1990
Filed:
Aug. 02, 1988
Applicant:
Inventors:
Richard M Lazarus, Mission Viejo, CA (US);
Randall Kautz, Irvine, CA (US);
Sunit S Dixit, Mission Viejo, CA (US);
Assignee:
Morton Thiokol, Inc., Chicago, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
430192 ; 430165 ; 430166 ; 430193 ; 430270 ;
Abstract
Novolak resins are provided which are the condensation product of (a) a phenol, phenol derivative, or mixtures thereof, and (b) a mixture of formaldehyde or a formaldehyde precursor and an aromatic aldehyde. When the aromatic aldehyde is a monohydroxy aromatic aldehyde, the novolak resin is especially useful in positive photoresist formulations.