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Patent Searching and Data


Title:
SURFACE ACOUSTIC WAVE DEVICE
Document Type and Number:
Japanese Patent JPH04281611
Kind Code:
A
Abstract:

PURPOSE: To reduce the effect of a bulk wave generated at an input side electrode and reaching an output side electrode to deteriorate an out-band attenuation in the surface acoustic wave device used for a communication equipment or the like.

CONSTITUTION: The surface acoustic wave device is formed by fixing a piezoelectric substrate 1 on the front side of which an interdigital input side electrode 3 and an interdigital output electrode 4 are arranged to a stem 6 by using an adhesives 2, and the effective thickness being the sum of the thickness of the piezoelectric substrate 1 and the thickness of the adhesives 2 is selected to be a dimension at which a bulk wave generated in the input side electrode 3 does not give effect onto the out-band attenuation so as to reduce the effect of the bulk wave and to reduce the deterioration in the out-band attenuation.


Inventors:
MURASE YASUMICHI
Application Number:
JP4478091A
Publication Date:
October 07, 1992
Filing Date:
March 11, 1991
Export Citation:
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Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
H03H9/25; (IPC1-7): H03H9/25
Attorney, Agent or Firm:
Fumio Iwahashi (2 others)