Metal working – Method of mechanical manufacture – Fluid pattern dispersing device making – e.g. – ink jet
Reexamination Certificate
2008-01-15
2008-01-15
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Fluid pattern dispersing device making, e.g., ink jet
C029S025350, C029S831000, C029S832000, C029S842000, C029S844000, C216S027000
Reexamination Certificate
active
07318277
ABSTRACT:
A method of manufacturing a liquid jet head includes the steps of: forming a piezoelectric element on one plane of a passage-forming substrate with a vibration plate interposed therebetween, and removing the vibration plate in an area where a communicating portion is formed, thus forming a penetrated hole; forming a predetermined metal layer on the one plane of the passage-forming substrate on which the piezoelectric element is formed to seal the penetrated hole with the metal layer, and patterning the metal layer in an area corresponding to the piezoelectric element, thus forming a lead electrode; adhering a reservoir-forming plate, in which a reservoir portion is formed, to the one plane of the passage-forming substrate; wet-etching the passage-forming substrate from the other plane thereof until the vibration plate and the metal layer are exposed, thus forming a pressure generating chamber and the communicating portion; and removing the metal layer by etching to allow the reservoir portion and the communicating portion to communicate with each other.
REFERENCES:
patent: 4894664 (1990-01-01), Tsung Pan
patent: 5148185 (1992-09-01), Abe et al.
patent: 6260960 (2001-07-01), Hashizume et al.
patent: 6398348 (2002-06-01), Haluzak et al.
patent: 2003-159801 (2003-06-01), None
Matsuzawa Akira
Ota Mutsuhiko
Takahashi Tetsushi
Torimoto Tatsuro
Nguyen Tai Van
Seiko Epson Corporation
Sughrue & Mion, PLLC
Tugbang A. Dexter
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