Piezoelectric element and injector using the same
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United States of America Patent
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-
Jan 25, 2005
Grant Date -
Oct 24, 2002
app pub date -
Apr 16, 2002
filing date -
Apr 19, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A piezoelectric element and an injector using the same piezoelectric element are disclosed, which are so high in reliability as not to be shorted even in a high humidity environment, are small in size, are low in cost and are high in heat radiation capability. The piezoelectric element comprises a ceramic laminate (10) including a plurality of ceramic layers of a piezoelectric ceramic (11) and a plurality of internal electrode layers (21, 22), stacked alternately. At least an organic insulating layer (41) of an organic material is formed on at least a part of the surface of the ceramic laminate (10), and at least an inorganic insulating layer (42) of an inorganic material is formed on the organic insulating layer (41).
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