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:
Nov. 08, 1994
Filed:
Jan. 31, 1994
Applicant:
Inventors:
Naoyuki Okamoto, Aichi, JP;
Hidetoshi Mizutani, Aichi, JP;
Kazunori Miura, Aichi, JP;
Kazuo Kondo, Aichi, JP;
Assignee:
NGK Spark Plug Co., Ltd., Aichi, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428210 ; 174257 ; 174264 ;
Abstract
A ceramic substrate is described consisting essentially of a crystallized glass and having at least one throught-hole filled with a conductor material having 100 parts by weight of copper and form 1 to 30 parts by weight of a glass having a softening point of 1,000.degree. C. or less and a thermal expansion coefficient of from 1.5.times.10.sup.-6 /K to 4.0.times.10.sup.-6 /K as measured in a temperature range of from room temperature to 400.degree. C.