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:
Dec. 10, 1991
Filed:
Apr. 24, 1990
Yutaka Tatsumi, Kyoto, JP;
Teruhisa Sako, Kyoto, JP;
Kunio Motoyama, Kyoto, JP;
Syunji Nakata, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A thick film type thermal head which includes an insulative substrate (2), an under-glaze layer (3) formed on the insulative substrate (2), a heat-generating resistor (6) and an electrode device for energizing the heat generating resistor (6) which are formed on the under-glaze layer (3), and an overcoating layer (7) for covering the heat-generating resistor (6). The overcoating layer (7) further includes a first overcoating layer (7a) formed by a thick film forming technique, and a second overcoating layer (7b) formed on the first overcoating layer (7a) through employment of a thin film forming technique.