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:
Jan. 07, 2003
Filed:
Jul. 28, 1999
Masato Shimada, Nagano, JP;
Shinri Sakai, Nagano, JP;
Yoshinao Miyata, Nagano, JP;
Souichi Moriya, Nagano, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An ink jet recording head includes pressure generating chambers communicating with associated nozzle orifices and piezoelectric elements provided in a one-to-one correspondence with the pressure generating chambers. Each of the piezoelectric elements includes a lower electrode provided in an area corresponding to the pressure generating chamber via an insulating layer, a piezoelectric layer provided on the lower electrode, and an upper electrode provided on a surface of the piezoelectric layer. Each of the piezoelectric elements includes an active part provided in an area facing the pressure generating chamber to be driven substantially, and an inactive part not to be driven even having the piezoelectric layer continued from the active part.