Surface acoustic wave device, electronic component using the...

Details Surface acoustic wave device, electronic component using the... Surface acoustic wave device, electronic component using the...

2005-08-30

2005-08-30

Summons, Barbara (Department: 2817)

Wave transmission lines and networks

Coupling networks

Delay lines including elastic surface wave propagation means

C333S193000, C310S364000, C310S31300R

Reexamination Certificate

active

06937114

ABSTRACT:
A surface acoustic wave device includes a piezoelectric substrate and an electrode provided on the substrate. The electrode includes a first metal layer provided on the piezoelectric substrate and having a trapezoid shape in the cross section and a second metal layer provided over the piezoelectric substrate at the same position as the first metal layer over the piezoelectric substrate. By controlling the shape of side surfaces of the electrode, the surface acoustic wave device hardly vary in a propagation frequency.

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International Search Report corresponding to application No. PCT/JP02/13544 dated Mar. 25, 2003.
English translation of PCT/ISA/210, dated Mar. 25, 2003.

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