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. 06, 2004
Filed:
Aug. 29, 2001
Applicant:
Inventors:
David W. Minsek, Pleasantville, NY (US);
Eric L. Alemy, Landing, NJ (US);
Assignee:
Microchem Corp., Newton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F 7/038 ; G03F 7/38 ;
U.S. Cl.
CPC ...
G03F 7/038 ; G03F 7/38 ;
Abstract
A photoimageable composition suitable for use as a negative photoresist comprising about 75% to about 95% by weight of at least one epoxidized polyfunctional bisphenol A formaldehyde novolak resin; about 5% to about 25% by weight of at least one polyol reactive diluent; and at least one photoacid generator in an amount from about 2.5 to about 12.5 parts per hundred parts of resin and reactive diluent, which initiates polymerization upon exposure to near-ultraviolet radiation; dissolved in a sufficient amount of coating solvent.