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. 21, 2015
Filed:
Nov. 19, 2010
Applicants:
Takahiro Yamada, Ibaraki, JP;
Tomohiko Koda, Ibaraki, JP;
Hitoshi Kida, Ibaraki, JP;
Inventors:
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/16 (2006.01); H01L 41/257 (2013.01); H01L 41/083 (2006.01); B41J 2/045 (2006.01); B41J 2/14 (2006.01);
U.S. Cl.
CPC ...
B41J 2/1612 (2013.01); B41J 2/162 (2013.01); B41J 2/161 (2013.01); B41J 2/14201 (2013.01); B41J 2/14209 (2013.01); B41J 2/14233 (2013.01); H01L 41/083 (2013.01); H01L 41/257 (2013.01); B41J 2/04506 (2013.01); B41J 2/0456 (2013.01); B41J 2/04581 (2013.01); B41J 2/14274 (2013.01);
Abstract
A method for manufacturing a liquid discharging head, the method including forming a plurality of nozzles that discharge liquid droplets, forming a plurality of piezoelectric elements that generate pressure for discharging liquid droplets from the respective nozzles; and performing a repolarization process on the piezoelectric elements to set non-uniformity of the droplet discharging characteristics of the nozzles to be in a predetermined range by combining adjustment of a polarization sensitivity and adjustment of a polarization voltage for each of the piezoelectric elements.