Method for manufacturing low noise piezoelectric transducer

Details Method for manufacturing low noise piezoelectric transducer Method for manufacturing low noise piezoelectric transducer

1992-05-04

1993-11-09

Hall, Carl E.

Metal working

Piezoelectric device making

310359, 310800, H01L 4122

Patent

active

052590992

ABSTRACT:
A high unidirectivity piezoelectric element whose d.sub.31, d.sub.33 or d.sub.h is substantially zero. The element may be in the form of a sheet or a cable and includes a pair of electrodes, and a piezoelectric layer interposed between the pair of electrodes and containing two, first and second inorganic piezoelectric materials which have different coercive forces from each other and which are polarized in opposite directions. The element may be obtained by first applying a direct current voltage to a layer containing the first and second piezoelectric materials to polarize the both piezoelectric materials in one direction, and then applying a reverse direct current voltage thereto so that one of the piezoelectric materials having a smaller coercive force is selectively polarized in the other direction.

REFERENCES:
patent: 4841494 (1989-06-01), Banno

Affiliated with

Also associated with

Rating

Method for manufacturing low noise piezoelectric transducer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for manufacturing low noise piezoelectric transducer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for manufacturing low noise piezoelectric transducer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1134416