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. 29, 2008
Filed:
Mar. 22, 2004
Seung-mo Lim, Yongin-si, KR;
Jae-woo Chung, Suwon-si, KR;
Jae-chang Lee, Hwaseong-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, Gyeonggi-do, KR;
Abstract
A piezoelectric actuator for providing a driving force to a pressure chamber of an ink-jet printhead for ejecting ink by deforming a vibration plate, the vibration plate forming an upper wall of the pressure chamber, the piezoelectric actuator including a lower electrode formed on the vibration plate, a piezoelectric film having either: (a) peripheral portions, the piezoelectric film formed on the lower electrode at a position that corresponds to the pressure chamber and having a space between the peripheral portions and the lower electrode, or (b) a lateral surface, the piezoelectric film formed on the lower electrode at a position that corresponds to the pressure chamber, the lateral surface of the piezoelectric film substantially forming a right angle with respect to a top surface of the lower electrode, and an upper electrode formed on the piezoelectric film for applying a voltage to the piezoelectric film.