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. 08, 2019
Filed:
Mar. 06, 2018
Applicant:
Canon Kabushiki Kaisha, Tokyo, JP;
Inventors:
Koji Sasaki, Nagareyama, JP;
Shingo Nagata, Tokyo, JP;
Assignee:
CANON KABUSHIKI KAISHA, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L 23/00 (2006.01); B41J 2/16 (2006.01); B41J 2/14 (2006.01);
U.S. Cl.
CPC ...
H01L 24/05 (2013.01); B41J 2/1433 (2013.01); B41J 2/14072 (2013.01); B41J 2/162 (2013.01); B41J 2/1603 (2013.01); B41J 2/1623 (2013.01); B41J 2/1629 (2013.01); B41J 2/1631 (2013.01); B41J 2/1643 (2013.01); B41J 2/1645 (2013.01); H01L 24/03 (2013.01); H01L 2224/0362 (2013.01); H01L 2224/03462 (2013.01); H01L 2224/03614 (2013.01); H01L 2224/04042 (2013.01); H01L 2224/05082 (2013.01); H01L 2224/05092 (2013.01); H01L 2224/05144 (2013.01); H01L 2224/05166 (2013.01); H01L 2224/05181 (2013.01); H01L 2224/05184 (2013.01); H01L 2924/04941 (2013.01); H01L 2924/04953 (2013.01);
Abstract
A liquid ejection head substrate includes an electrode pad for receiving driving power for liquid ejection from an outside, the electrode pad including at least a conductor layer and a layer of gold. A portion of the conductor layer has an opening region, and an upper layer portion in a laminating direction above the conductor layer including the opening region has at least the layer of gold. An external connection portion connected to the outside is provided on top of the layer of gold corresponding to the opening region of the conductor layer.