Elastic wave device having an electrode finger with a side edge projection
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United States of America Patent
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Mar 10, 2009
Grant Date -
Dec 27, 2007
app pub date -
Aug 23, 2007
filing date -
Apr 8, 2005
priority date (Note) -
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Abstract
An elastic wave device includes at least one IDT electrode provided on a piezoelectric substrate. The at least one IDT electrode includes first and second electrode fingers arranged next to each other in a propagation direction of elastic wave. The side edges of at least the electrode finger of the first and second electrode fingers are provided with projections. The position of the projections in the longitudinal direction of the electrode fingers substantially corresponds with the position of a gap in the longitudinal direction of the electrode fingers, the gap being provided at the tip end of the electrode finger of the first and second electrode fingers.
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