Method of manufacturing a stack-type piezoelectric element
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United States of America Patent
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Nov 17, 1992
Grant Date -
N/A
app pub date -
Apr 18, 1990
filing date -
Apr 26, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an overall stacked piezoelectric element, the material for the electrode was selected from aluminum, nickel and copper each alone or alloys based on aluminum, nickel or copper, and further the parts of the electrode which contact with molding resin on the side face of the stacked body and the parts which have to be insulated from the lead-out terminals were subjected to an oxidation or nitriding treatment. As the result, an improved element was obtained which is of a high reliability, suited to low voltage operation and suffers no short-circuit of the electrode even when water permeates to the side face of the stacked body during operation in humid atmosphere.
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