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:
Sep. 06, 2011
Filed:
Apr. 28, 2010
Kazuhiro Hayakawa, Kawasaki, JP;
Kazuhiro Hayakawa, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for manufacturing a liquid discharge head includes providing a first layer containing a metal nitride to at least a portion on one surface of a silicon substrate corresponding to a supply port; providing a second layer on the first layer, the second layer including any one of aluminum, copper, and gold, or an alloy thereof; etching a portion of the silicon substrate corresponding to the supply port by reactive ion etching in a direction from the reverse surface towards the one surface so that the etched region reaches the first layer; and removing a portion of the first layer corresponding to the supply port and then removing a portion of the second layer corresponding to the supply port, thus forming the supply port.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile