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. 30, 1994
Filed:
Mar. 09, 1993
Applicant:
Inventors:
Hirayoshi Tanei, Yokohama, JP;
Shoichi Iwanaga, Yokohama, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ; C03C / ;
U.S. Cl.
CPC ...
428209 ; 428426 ; 428901 ; 501 32 ; 501 65 ; 501 66 ; 174250 ; 361748 ;
Abstract
A ceramic composition comprising 55-70 vol % of a borosilicate glass consisting of 65-88 wt % of SiO.sub.2, 5-25 wt % of B.sub.2 O.sub.3, 1-5 wt % of one or more of Li.sub.2 O, K.sub.2 O and Na.sub.2 O, and 0-5 wt % of Al.sub.2 O.sub.3, 5-30 vol % of alumina as filler, 5-35 vol % of cordierite and 0-20 vol % of quartz glass is provided for a ceramic circuit board for an electronic device such as an electronic computer.