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. 04, 2008
Filed:
Mar. 20, 2007
Applicants:
Akiyoshi Hattori, Nagoya, JP;
Yutaka Mori, Nagoya, JP;
Kazuhiro Nobori, Handa, JP;
Inventors:
Assignee:
NGK Insulators, Ltd., Nagoya, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01T 23/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
An alumina sintered body comprises an alumina substrate having a first main surface and a second main surface opposing each other, an embedded film electrode made of a metal and embedded in the alumina substrate at a depth Hof 0.4 mm or less from a first main surface SF, and an embedded terminal formed of a metal, embedded in the alumina substrate nearer a second main surface SFside than the embedded electrode. The embedded terminal is in contact with the embedded electrode and a film thickness Hof the embedded electrode is 25 μm or less.