Patent ID: 7673375
Filing Date: 2010-03-09
Classification: B06B,B81B,B81C,Y10T

Abstract:
1. A method of fabricating a polymer-based capacitive ultrasonic transducer, comprising steps of: (a). providing a substrate; (b). forming a first conductor on the substrate; (c). coating a first polymer-based material on the first conductor while covering the first conductor by the first polymer-based material; (d). etching the first polymer-based material for forming an exposure area; (e). forming a sacrificial layer in the exposure area; (f). coating a second polymer-based material on the sacrificial layer while covering the sacrificial layer completely by the second polymer-based material; (g). forming a via hole on the second polymer-based material while enabling the via hole to be channeled to the sacrificial layer; (h). forming a second conductor on the second polymer-based material; (i). covering the second polymer-based material by a third polymer-based material; and (j). utilizing the via hole to etch and remove the sacrificial layer for forming a cavity.