Patent ID: 7786826
Filing Date: 2010-08-31
Classification: H03H,Y10T

Abstract:
1. An apparatus, comprising: a first bulk acoustic wave (BAW) device comprising: a first BAW resonator comprising a first piezoelectric layer sandwiched between a first and a second electrode over a first resonator area, wherein the first piezoelectric layer comprises a first layer thickness, the first BAW resonator comprising a first impedance; a second BAW device comprising: a second BAW resonator comprising a second piezoelectric layer sandwiched between a first and a second electrode layer over a second resonator area, wherein the second piezoelectric layer comprises a second layer thickness, the second BAW resonator comprising a second impedance, that is different from the first impedance; and an acoustic coupling structure disposed between the first BAW device and the second BAW device, the acoustic coupling structure comprising a plurality of layers of alternating materials of high and low acoustic impedances, wherein the first resonator area differs from the second resonator area.