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:
Dec. 22, 2015
Filed:
Aug. 28, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A process for producing a liquid ejection head, comprising providing a substrate with an energy-generating element for ejecting liquid and a wiring; forming a flow path wall forming layer containing a negative photosensitive resin on the substrate; exposing a portion to be a flow path wall of the flow path wall forming layer; forming an ejection orifice forming layer containing a negative photosensitive resin on the flow path wall forming layer; applying a material for a water-repellent layer onto the ejection orifice forming layer; drying a solvent contained in the applied material to form the water-repellent layer; exposing another region than a portion to be an ejection orifice of the ejection orifice forming layer and the water-repellent layer; and dissolving and removing the non-exposed portions, wherein the boiling point of the solvent is not more than the drying temperature in the step to form the water-repellent layer.