Patent ID: 8980670
Filing Date: 2015-03-17
Classification: B06B,B81C

Abstract:
1. A method of manufacturing an electromechanical transducer, comprising: forming a through hole in a first semiconductor substrate; forming a first insulating layer on a first surface of the first semiconductor substrate and forming a concave portion in the first insulating layer; bonding a second semiconductor substrate including a semiconductor film to the first insulating layer so as to form a gap between the first surface and the second semiconductor substrate; forming a second insulating layer on a side wall of the through hole; forming a conductor on the second insulating layer; thinning the second semiconductor substrate; and dividing the semiconductor film for each of multiple elements, wherein, before the bonding of the second semiconductor substrate, the through hole and the second insulating layer are formed, and wherein, after the bonding of the second semiconductor substrate, the conductor is formed, wherein, before the forming of the through hole, a protective film is formed on the first surface of the first semiconductor substrate, and wherein, after the forming of the through hole and before the forming of the first insulating layer, the protective film is removed.