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:
Feb. 23, 2021
Filed:
Jul. 29, 2019
Applicants:
Satoshi Mizukami, Kanagawa, JP;
Takahiko Kuroda, Hyogo, JP;
Inventors:
Satoshi Mizukami, Kanagawa, JP;
Takahiko Kuroda, Hyogo, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/175 (2006.01); B41J 2/16 (2006.01); B41J 2/14 (2006.01);
U.S. Cl.
CPC ...
B41J 2/1642 (2013.01); B41J 2/161 (2013.01); B41J 2/162 (2013.01); B41J 2/1606 (2013.01); B41J 2/1623 (2013.01); B41J 2/1626 (2013.01); B41J 2/14233 (2013.01);
Abstract
A liquid discharge head includes a channel forming member made of silicon, the channel forming member including a plurality of liquid channels, a natural oxide film having a film thickness of 2 nm or more on an outermost surface of the plurality of liquid channels of the channel forming member, and a surface treatment film on the natural oxide film to contact the natural oxide film. Each of a carbon content and a fluorine content in an interface between the natural oxide film and the surface treatment film is 5 atomic % or less.