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:
May. 14, 2002
Filed:
Nov. 24, 1999
Applicant:
Inventors:
Assignee:
Industrial Technology Research Institute, Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/704 ; C08K 7/14 ; C08L 2/516 ; C08L 6/302 ; C08L 6/304 ;
U.S. Cl.
CPC ...
B32B 1/704 ; C08K 7/14 ; C08L 2/516 ; C08L 6/302 ; C08L 6/304 ;
Abstract
A low dielectric constant composition used in electric circuit boards is disclosed. The composition includes (a) 20-99.9 parts by weight of a functionalized syndiotactic styrene/para-alkystyrene copolymer having microfoaming when being cured; (b) 0.01-80 parts by weight of a mixture of epoxy resins; and (c) less than 50 parts by weight of a curing agent.