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:
Dec. 07, 1999
Filed:
Mar. 17, 1998
Dennis P Hogan, Jericho, VT (US);
Harold G Linde, Richmond, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A composition of matter comprising a polyamic acid/ester having an amide pendant group directly substituting an acid site of the polyamic acid is provided, which composition when cured provides a colored polymer film when the amide group is a chromophore. The resulting polymer which may be applied as a film to semiconductor chips to provide an optically sensitive semiconductor chip comprises a partially imidized polyamic acid wherein an amide pendant group is directly attached to one acid moiety of the polyamic acid and the other acid group imidized with the adjacent amino group of the polyamic acid. The polymers are useful as optical filters on semiconductor chips and for photoresist applications.