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:
Jun. 28, 2011
Filed:
Feb. 21, 2008
Naofumi Kanei, Kyoto, JP;
Takumi Yamade, Kyoto, JP;
Naofumi Kanei, Kyoto, JP;
Takumi Yamade, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A thermal printhead (A) includes an insulating substrate (), a heating resistor () provided on the substrate () and a protective film () covering the heating resistor (). The protective film () is made up of a first layer (), a second layer () and a third layer (). The first layer () is held in contact with the heating resistor (). The second layer () covers the first layer (). The second layer () is harder than the first layer () and has a higher thermal conductivity than that of the first layer (). The third layer () is the outermost layer and covers the second layer (). The third layer () is harder than the second layer () and thinner than the second layer ().