Patent ID: 7778113
Filing Date: 2010-08-17
Classification: B06B

Abstract:
1. An ultrasonic transducer, comprising: a first lower wiring extending in a first direction; a second lower wiring extending in the first direction; an upper wiring disposed over the first and second lower wirings and extending in a second direction which crosses the first direction, and having a first region where the upper wiring extends toward the first lower wiring and a second region where the upper wiring extends toward the second lower wiring; a first insulator disposed between the upper wiring in the first region and the first lower wiring; a second insulator disposed between the upper wiring in the second region and the second lower wiring; a first cavity portion disposed in the first insulator; a second cavity portion disposed in the second insulator; and a third insulator disposed in a third region between the first cavity and the second cavity portion, wherein a sum total of a thickness of the third insulator between the first or second lower wiring and the upper wiring is larger than a sum total of a thickness of the first or second insulator.