Patent ID: 8581354
Filing Date: 2013-11-12
Classification: B81B,B81C

Abstract:
1. A semiconductor device comprising: a semiconductor integrated circuit device; a MEMS pressure sensor disposed over said semiconductor integrated circuit device and forming a variable capacitor; said MEMS pressure sensor including a lower electrode, an upper electrode having holes, a cavity portion between said lower electrode and said upper electrode, and an insulating sealing film layer disposed on and covering said upper electrode to seal said holes; a first silicon nitride film disposed between said semiconductor integrated circuit device and said lower electrode of said MEMS pressure sensor; and a second silicon nitride film disposed on an upper surface of said insulating sealing film layer and covering said insulating sealing film layer, wherein said first and second silicon nitride films are in direct contact with each other so as to hermetically seal said MEMS pressure sensor, and wherein the upper silicon nitride layer is deformable with the upper electrode in response to pressure.