Patent ID: 9571063
Date: 2017-02-14
CPC Classifications: H03H

Claim:
1. An acoustic resonator device, comprising: a bottom electrode disposed on a substrate over an acoustic reflecting feature; a piezoelectric layer disposed on the bottom electrode; a top electrode disposed on the piezoelectric layer, an overlap between the bottom electrode, the piezoelectric layer and a portion of the top electrode in contact with the piezoelectric layer, stacked over the acoustic reflecting feature, defining a main membrane region of the acoustic resonator device; and at least one of a wing having outer edges extending beyond an outer boundary of the main membrane region, and a first frame formed on the top electrode in an outer region of the main membrane region, wherein inner edges of the at least one of the wing and of the first frame provide an apodized polygon shape, such that none of the inner edges are parallel to one another, the apodized polygon shape of the at least one of the wing and the first frame being different from an electrode shape defined by the outer boundary of the main membrane region.