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:
Nov. 18, 2025
Filed:
Jul. 18, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Souta Takeuchi, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for manufacturing an element substrate of a liquid ejection head, the method includes forming a silicon-based film layer including carbon on one surface of a base substrate, laminating a silicon substrate on the film layer formed on the one surface of the base substrate and bonding the silicon substrate to the film layer, processing the silicon substrate bonded to the film layer using the film layer as a stop layer and forming a lower hole portion, processing the base substrate using the film layer as the stop layer and removing the base substrate to expose the film layer, and forming an opening portion communicating with the lower hole portion in the exposed film layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile