Patent ID: 7919835
Filing Date: 2011-04-05
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate having a first surface and a second surface facing each other; a first insulating film formed on said first surface of said semiconductor substrate and having a specific permittivity of 4 or higher; a circuit constituent element formed on said first surface of said semiconductor substrate and covered with said first insulating film; a contact plug formed in said first insulating film and electrically connected to said circuit constituent element; a through-substrate contact plug penetrating through said semiconductor substrate and said first insulating film; a second insulating film formed on said first insulating film and having a specific permittivity of 3.5 or lower; a first interconnect layer formed in said second insulating film and electrically connected to said through-substrate contact plug and said contact plug; a third insulating film formed on said second insulating film and having a specific permittivity of 3.5 or lower; a second interconnect layer formed in said third insulating film; a via contact formed in said third insulating film so as to electrically connect said first interconnect layer and said second interconnect layer; a first electrode formed in an exposed state and external to said third insulating film and electrically connected to said second interconnect layer; and a second electrode formed in an exposed state and external to said second surface of said semiconductor substrate and electrically connected to said through-substrate contact plug.