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:
May. 07, 2013
Filed:
Aug. 23, 2011
Taichi Yonemoto, Isehara, JP;
Hiroyuki Abo, Tokyo, JP;
Keisuke Kishimoto, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a method of manufacturing a substrate for liquid ejection head, including: forming a groove portion by etching on one surface side of a silicon substrate, the groove portion being formed so as to surround a portion at which a liquid supply port is to be formed on an inner side of the groove portion; forming a protective layer on the one surface side of the silicon substrate, the protective layer being formed inside the groove portion and on an outer side of the groove portion; and forming the liquid supply port by subjecting the silicon substrate to crystal anisotropic etching treatment with use of the protective layer as a mask.