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:
Sep. 18, 1984
Filed:
Aug. 01, 1983
Applicant:
Inventor:
Susumu Shibata, Tokyo, JP;
Assignee:
Oki Electric Industry Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 / ; 400120 ; 219216 ;
Abstract
A thermal head for high speed printing with high temperature comprises a dielectric substrate, a first thin S.sub.i O.sub.2 layer on the substrate, heater layers on the first S.sub.i O.sub.2 layer, conductive layers for coupling the heater layer with an external circuit, a second thin S.sub.i O.sub.2 layer on the heater layer, and a protection layer on the second S.sub.i O.sub.2 layer. The width of the heater layer is less than 30 .mu.m, and the preferable thickness of the first and second S.sub.i O.sub.2 layers is less than 2 .mu.m. Preferably, the heater layer is made of tantalium nitride (T.sub.a2 N).