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:
Apr. 19, 2011
Filed:
Mar. 26, 2007
Applicant:
Teruhisa Sako, Kyoto, JP;
Inventor:
Teruhisa Sako, Kyoto, JP;
Assignee:
Rohm Co., Ltd., Kyoto, JP;
Primary Examiner:
Int. Cl.
CPC ...
H05B 3/26 (2006.01); H05B 3/28 (2006.01); G03G 15/20 (2006.01); H01L 23/29 (2006.01); H01L 23/31 (2006.01);
U.S. Cl.
CPC ...
Abstract
A heating unit includes an AlN substrate having a main surface on which an elongated heat-generating resistor is provided. A protection layer is formed on the main surface of the substrate for the heat-generating resistor. The protection layer includes a first cover layer covering the heat-generating resistor and a second cover layer covering the first cover layer. The first cover layer is made of crystallized or semi-crystallized glass having a higher crystallization temperature by at least 50° C. than the softening point of the glass. The second cover layer is made of non-crystalline glass.