Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-06-05
2007-06-05
Meier, Stephen (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S068000
Reexamination Certificate
active
10497456
ABSTRACT:
A piezoelectric element comprises a diaphragm30, a lower electrode42dformed in a prescribed pattern on the diaphragm, a piezoelectric film43formed on the lower electrode, and upper electrodes44formed on the piezoelectric film. A metallic layer42belectrically disconnected from the upper electrodes and the lower electrode is formed on the diaphragm in the vicinity of the piezoelectric film. The gap between the lower electrode and the metallic layer is no more than 200 μm. In this way, excellent crystallinity of the piezoelectric film can be achieved also in the vicinity of the edges of the lower electrode, thereby making it possible to provide piezoelectric elements and a liquid discharge head that can withstand high voltage and are of better reliability.
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Meier Stephen
Mruk Geoffrey S.
Seiko Epson Corporation
Sughrue & Mion, PLLC
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