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. 10, 2002
Filed:
Dec. 30, 1999
Rohm Co., Ltd., Kyoto, JP;
Abstract
A thermal printhead includes a head substrate ( ), a heating resistor ( ) provided on the head substrate, a plurality of individual electrodes ( ) connected to the heating resistor, and a common electrode ( ) connected to the heating resistor. The thermal printhead is further provided with a first coating layer ( ) covering the heating resistor, the individual electrodes and the common electrode, and a second coating layer ( ) which is formed on the first coating layer and made of sialon containing a conductive material as an additive. The first coating layer is formed with at least one through-hole ( ) or notch ( ′), so that the second coating layer is electrically connected to the common electrode via the through-hole or the notch.