Patent ID: 9232289
Filing Date: 2016-01-05
CPC Classification: H03H,H04R

Claim Text:
1. An acoustic bandgap device formed using a semiconductor fabrication tool, the semiconductor fabrication tool having a minimal feature thickness and an allowable via width based on a design rule check of the semiconductor fabrication tool, the device comprising: a substrate lying in an x-y plane defining an x-direction and a y-direction; an acoustic resonant cavity disposed over the substrate; a phononic crystal disposed over the acoustic resonant cavity, the phononic crystal comprising a plurality of unit cells disposed in a periodic arrangement, each unit cell comprising: (i) at least one higher acoustic impedance structure having a longitudinal axis oriented in the y-direction and a thickness in the x-direction greater than or about equal to the minimal feature thickness of the semiconductor fabrication tool, the at least one higher acoustic impedance structure comprising at least one of: (ii) at least one lower acoustic impedance material bordering at least a portion of the at least one higher acoustic impedance structure and forming at least a portion of a remainder of the respective unit cell;