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:
Feb. 27, 1990
Filed:
Jul. 14, 1988
Applicant:
Inventors:
Yozo Kobayashi, Fuji, JP;
Norihito Mochizuki, Fuji, JP;
Hisao Suzuki, Mishima, JP;
Shinichi Mizushima, Mishima, JP;
Assignee:
Tokyo Electric Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ; H05B / ; H01C / ; B32B / ;
U.S. Cl.
CPC ...
346 / ; 219216 ; 338308 ; 428640 ;
Abstract
A thermal print head comprising a sequential laminated arrangement of an insulating substrate, a heating resistance layer, an electrode layer formed in a predetermined pattern, and a protective layer. The protective layer is formed of a mixture of Al.sub.2 O.sub.3 as a principal component, and SiO.sub.2. The protective layer has satisfactory heat resistance, abrasion resistance, crack resistance, moisture resistance and chemical stability.