Multi-layered substrate for a surface-acoustic-wave device

Details Multi-layered substrate for a surface-acoustic-wave device Multi-layered substrate for a surface-acoustic-wave device

1976-03-16

1977-07-19

Lieberman, Eli

Wave transmission lines and networks

Coupling networks

With impedance matching

310 8, 310 89, 310 98, 333 72, 427100, H03H 930, H03H 902, H01L 2720, H03H 926

Patent

active

040371760

ABSTRACT:
This invention provides a multi-layered substrate for a surface-acoustic-wave device which substrate comprises a piezoelectric layer on a base, the temperature coefficient of a phase velocity of the surface-acoustic-wave in the piezoelectric layer being different from that of the base, the piezoelectric layer having a thickness less than a wavelength of the SAW. This multi-layered substrate can have a large electromechanical coupling and controlled temperature coefficient of the phase velocity.

REFERENCES:
patent: 3786373 (1974-01-01), Schulz et al.
patent: 3931420 (1976-01-01), Schulz et al.
patent: 3943389 (1976-03-01), Hickernell et al.
patent: 3965444 (1976-06-01), Willingham et al.

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