Improving the stability of resonant frequency of...

Details Improving the stability of resonant frequency of... Improving the stability of resonant frequency of...

H - Electricity

01

L

356/200, 349/65

H01L 41/22 (2006.01) H03H 3/08 (2006.01) H04R 31/00 (2006.01)

Patent

CA 1153102

ABSTRACT: Piezoelectric device comprising a protective housing containing a piezoelectric body bearing aluminium film electrodes. The surfaces of the electrodes which are not in contact with the piezoelectric body bear a passivating layer of amorphous aluminium oxide. The amorphous aluminum oxide layer may be made by heating the electrodes at a temperature between 250 and 550°C in an atmosphere containing free oxygen. The piezoelectric device may be, for example an acoustic surface wave device.

327038

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