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. 29, 2000
Filed:
Sep. 07, 1994
Applicant:
Inventor:
Shuji Takeshita, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428209 ; 428458 ; 428901 ; 174251 ; 174258 ; 174259 ;
Abstract
A thin film circuit substrate comprising multilayer conductor layers formed via insulating layers, wherein a signal transmission path in at least one of the conductor layers is embedded in a low dielectric constant insulator, and the low dielectric constant insulator is embedded in an insulator layer with a good adhesiveness. The thin film circuit substrate attains a low dielectric constant, and thus an improved signal propagation velocity, without lowering the interlayer adhesiveness.