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COUPLED ACOUSTIC DEVICES

  • US 20120007696A1
  • Filed: 07/07/2010
  • Published: 01/12/2012
  • Est. Priority Date: 07/07/2010
  • Status: Active Grant
First Claim
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1. An acoustic device, comprising:

  • a first coupled resonator filter (CRF) and a second CRF electrically coupled to one another,wherein each of the first CRF and the second CRF has an input port, an output port, a bottom film bulk acoustic resonator (FBAR), an acoustic decoupler formed on the bottom FBAR, and a top FBAR formed on the acoustic decoupler, wherein each of the bottom FBAR and the top FBAR has a bottom electrode, a piezoelectric layer formed on the bottom electrode, and a top electrode formed on the piezoelectric layer, and wherein the input and output ports of each CRF are electrically connected to first and second corresponding electrodes, respectively, such that the acoustic decoupler is located between the first and the second corresponding electrodes; and

    wherein the output port of the first CRF is electrically connected to the input port of the second CRF.

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