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. 07, 2014
Filed:
Feb. 16, 2012
Keitaro Koroishi, Chiba, JP;
Toshimitsu Morooka, Chiba, JP;
Noriyoshi Shoji, Chiba, JP;
Yoshinori Sato, Chiba, JP;
Norimitsu Sanbongi, Chiba, JP;
Keitaro Koroishi, Chiba, JP;
Toshimitsu Morooka, Chiba, JP;
Noriyoshi Shoji, Chiba, JP;
Yoshinori Sato, Chiba, JP;
Norimitsu Sanbongi, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A manufacturing method for a heating resistor element includes a concave portion forming step, a bonding step and a resistor forming step. The concave portion forming step includes forming a concave portion on at least one of bonded surfaces between an insulating substrate and a heat accumulating layer. The bonding step causes the bonded surfaces between the insulating substrate and the heat accumulating layer to adhere to each other to bond the insulating substrate and the heat accumulating layer. The resistor forming step includes forming a heating resistor at a position on the heat accumulating layer. The position is opposed to the concave portion. The concave portion forming step further includes processing an inner surface of the concave portion on a side of the insulating substrate to have surface roughness Ra of 0.2 μm or more.