Laminated piezoelectric element and vibration wave actuator
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United States of America Patent
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Jun 23, 1998
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N/A
app pub date -
Jan 24, 1996
filing date -
Jan 31, 1995
priority date (Note) -
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Abstract
A laminated piezoelectric element has a surface electrode formed on a surface of the element and having an area falling within the range from 0.002 mm.sup.2 to 0.2 mm.sup.2, and a first region excluding the surface electrode on the surface on which the surface electrode is formed, and having a level difference (surface roughness) which is less than or equal to 20 .mu.m.
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