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. 26, 1986
Filed:
Sep. 17, 1985
Applicant:
Inventors:
Gyozo Toda, Hino, JP;
Tsuyoshi Fujita, Yokohama, JP;
Hiromi Tosaki, Yokohama, JP;
Takashi Kuroki, Yokohama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428446 ; 264 56 ; 264 61 ; 264 66 ; 428210 ; 428901 ;
Abstract
A ceramic wiring board comprising a silica board having pores of several ten to several hundred .ANG. in diameter amounting to 5 to 20 vol % of the insulating layer, and a process for producing the same, which comprises heat-treating a silicon alkoxide to form a fine silica powder and sintering the fine powder. This board has good mechanical characteristics and a high signal propagation speed.