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:
Oct. 22, 2002
Filed:
Apr. 19, 2001
Applicant:
Inventors:
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/335 ;
U.S. Cl.
CPC ...
B41J 2/335 ;
Abstract
The thermal printhead ( ) includes an insulating substrate ( ), a heating resister ( ) formed on the substrate ( ), a first glass coat layer ( ) formed on the substrate ( ) for covering the heating resister ( ), and a second glass coat layer ( ) formed on the first glass coat layer ( ). The heating resister ( ) has a centerline average roughness not greater than 0.3 &mgr;m. The first glass coat layer ( ) has a centerline average roughness not greater than 0.1 &mgr;m.