Patent ID: 9660554
Date: 2017-05-23
CPC Classifications: B06B,B81B,G01N,H01L,H02N,Y10T

Claim:
1. A method for making a capacitive micromachined ultrasonic transducer (cMUT) having a plurality of transducer elements on a substrate, the method comprising: forming a patterned trench from a front side of the substrate to at least partially separate the plurality of transducer elements from each other; forming a covering layer over the patterned trench to at least temporarily cover the patterned trench; and completing the cMUT such that the plurality of the transducer elements each have a surface portion including a movable transducing member, the surface portion being on the front side spaced from the substrate to define a transducing gap between the movable transducing member and the substrate.