Patent ID: RE42346

Claim:
A solid state silicon-based condenser microphone comprising a silicon transducer chip ( 1 ) including a backplate ( 13 ) and a diaphragm ( 12 ) arranged substantially parallel to each other, thereby forming an electrical capacitor, the diaphragm ( 12 ) being movable relative to the backplate ( 13 ) in response to incident sound, an integrated electronic circuit chip ( 3 ) electrically coupled to the transducer chip ( 1 ), an intermediate layer ( 2 ) fixing the transducer chip ( 1 ) to the integrated electronic circuit chip ( 3 ) in a spaced relationship, with the transducer chip ( 1 ) on a first side of the intermediate layer ( 2 ) and the integrated electronic circuit chip ( 3 ) on a second side of the intermediate layer ( 2 ) opposite the first side, the intermediate layer ( 2 ) having a first through going opening ( 4 , 10 ) between its first side and its second side giving access of sound to the diaphragm.