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:
Aug. 04, 2020
Filed:
Feb. 08, 2019
Canon Kabushiki Kaisha, Tokyo, JP;
Yuji Tamaru, Tokyo, JP;
Yuichiro Akama, Tokyo, JP;
Naoko Tsujiuchi, Kawasaki, JP;
Sayaka Seki, Kawasaki, JP;
Yasuaki Kitayama, Yokohama, JP;
Yusuke Hashimoto, Yokohama, JP;
Takanobu Manabe, Oita, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
There is provided a method for manufacturing a liquid discharge head including a liquid discharge head substrate and a flow path forming member, the liquid discharge head substrate having a base, a pressure generation portion provided at a front surface of the base to generate pressure for discharging a liquid, and a supply port for supplying the liquid to the pressure generation portion, and the flow path forming member forming a flow path for feeding the liquid supplied from the supply port to the pressure generation portion. The method includes removing a sacrificial layer by etching the base from a back surface of the base, in a state in which an end covering portion of a cover layer for covering the sacrificial layer is covered with the resin layer. The method suppresses formation of a crack in the end covering portion that covers the end portion of the sacrificial layer.