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. 09, 2005
Filed:
Oct. 24, 2003
Mamiko Nomura, Kanuma, JP;
Masatoshi Hasegawa, Chiba, JP;
Junichi Ishii, Kanuma, JP;
Tadashi Akamatsu, Kanuma, JP;
Mamiko Nomura, Kanuma, JP;
Masatoshi Hasegawa, Chiba, JP;
Junichi Ishii, Kanuma, JP;
Tadashi Akamatsu, Kanuma, JP;
Sony Chemicals Corp., , JP;
Abstract
Polyimide precursors contained in resin compositions of the present invention have a polymer structure unit represented by formula (1) below:wherein chemical structure Aincludes an alicyclic compound but not an aromatic compound such as a benzene ring so that they provide excellent light transmission over a wide wavelength range. The polyimide precursors are imidized at 7.5% or more and 36% or less so that they are less soluble in developing solutions and therefore are not dissolved in the developing solutions at unexposed parts. Thus, the resin compositions of the present invention can be used to form a resin film having a precise pattern by exposure and development.