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:
May. 25, 2004
Filed:
May. 24, 2001
Applicant:
Inventor:
Toshihiko Harajiri, Chiba, JP;
Assignee:
Seiko Instruments Inc., Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 1/700 ;
U.S. Cl.
CPC ...
H04R 1/700 ;
Abstract
A head chip is manufactured by disposing partition walls made of piezoelectric ceramic between a pair of opposing substrates made of a dielectric material so that the partition walls are spaced apart at a preselected interval to form channels. Inorganic conductive films are formed on a surface of one of the substrates. At least one metal film is formed on a portion of each of the inorganic conductive films. An electrode is formed on a side surface of each of the channels. Each of the electrodes is electrically connected to a respective one of the metal films via a respective one of the inorganic conductive films.