Bulk acoustic wave (BAW) filter having a top portion that includ

Details Bulk acoustic wave (BAW) filter having a top portion that includ Bulk acoustic wave (BAW) filter having a top portion that includ

1997-03-13

1999-02-16

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333192, 310322, 310324, 310335, 310348, 310366, H03H 9205, H03H 954

Patent

active

058724931

ABSTRACT:
A Bulk Acoustic Wave (BAW) filter, comprising at least one resonator structure that is disposed over a substrate, and an acoustic mirror that is disposed over the resonator structure. The acoustic mirror includes a plurality of layers. The acoustic mirror substantially isolates acoustic vibrations produced by the resonator from reaching beyond an upper surface of the acoustic mirror. The acoustic mirror also prevents environmental contaminants from coming into contact with the resonator. Also disclosed are surface-mountable BAW components.

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