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. 17, 2012
Filed:
Dec. 11, 2009
Yuuji Tamaru, Yokohama, JP;
Yoshiyuki Imanaka, Kawasaki, JP;
Koichi Omata, Kawasaki, JP;
Hideo Tamura, Kawasaki, JP;
Yuuji Tamaru, Yokohama, JP;
Yoshiyuki Imanaka, Kawasaki, JP;
Koichi Omata, Kawasaki, JP;
Hideo Tamura, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection head substrate includes a primary conductive layer; an insulating layer; a pair of secondary conductive layers; a first connecting portion where the primary conductive layer is electrically connected to the secondary conductive layers, the first connecting portion penetrating the insulating layer; and a second connecting portion whose contact area is smaller than that of the first connecting portion. In the secondary conductive layers, a voltage is applied such that a first secondary conductive layer has a higher potential than a second secondary conductive layer.