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:
Dec. 10, 2002
Filed:
May. 24, 2001
Toshihiko Harajiri, Chiba, JP;
Seiko Instruments Inc., , JP;
Abstract
A head chip and a head unit, in which manufacturing cost is reduced and also manufacturing steps are simplified, are provided. In a head chip in which: partition walls made of piezoelectric ceramic are arranged on two upper and lower sheets of a first board and a second board with predetermined intervals; chambers are defined between the respective partition walls a driver voltage is applied to electrodes provided on the side surfaces of the partition walls to change the capacity in ink flow paths; and the ink filled in the ink flow paths is jetted from nozzle openings, the first board and the second board are formed of a dielectric material; wiring lines which are electrically conducted to the electrodes and elongated to the outside of the end portions of the partition walls in the longitudinal direction, are provided on the surface of any one of the first board and the second board and further the wiring lines include an inorganic conductive film 15 as the lowermost layer and metal films and formed thereon.