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:
Apr. 03, 2001
Filed:
Jul. 02, 1998
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method for manufacturing an ink jet recording head involves forming discharge ports by irradiating a laser beam onto a member which becomes the discharge port plate through a mask having specific patterns thereon. The mask includes a transmission section which regulates the shape of the discharge ports, and an attenuation section formed on the outer circumference of the transmission section so that the further the attenuation section is from the transmission, the less the laser beam becomes. This method also involves forming the discharge ports by irradiating the laser beam through the mask to the member, and each port has a cross-sectional shape which gradually tapers from a rectangular shape at a side of the port connected with the liquid flow path to a circular shape at a recording liquid discharge side of the port.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile