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:
Aug. 30, 2011
Filed:
Jun. 13, 2005
Teruhisa Sako, Kyoto, JP;
Teruhisa Sako, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A thermal head (A) according to the present invention includes a substrate () on which a heat-producing resistor (), a common electrode () and individual electrodes () for energizing the heat-producing resistor (), and a protective layer () having a double-layer structure and formed on the heat-producing resistor () to cover at least the heat-producing resistor are provided. A second protective layer (B) constituting the upper layer of the protective layer () is conductive, and a first protective layer (A) constituting the lower layer of the protective layer () has thickness (t) which is not less than three times the thickness (t) of the second protective layer (B).