Patent ID: 9539854
Date: 2017-01-10
CPC Classifications: B06B,B60B,H02N,Y10T

Claim:
1. A capacitive micromachined ultrasound transducer, comprising: a substrate; an insulating layer arranged in relation to the substrate to form a cavity; a first electrode disposed on the substrate; a first dielectric layer disposed between the cavity and the first electrode, wherein the first dielectric layer contacts an entire surface of the first electrode, and wherein the first dielectric layer comprises high-k dielectric material; a second electrode disposed between the cavity and the insulating laver, wherein the insulating layer covers are entire surface of the second electrode; a second dielectric layer disposed between the cavity and the second electrode, wherein the second dielectric layer comprises two oxide sublayers and one nitride sublayer arranged between the two oxide sublayers, wherein the transducer is coupled to a voltage source configured to apply a voltage such that during operation the transducer is in a pre-collapsed mode or a collapsed mode.