Patent ID: 7091588

Claim:
A semiconductor device comprising: a first semiconductor substrate; a second semiconductor substrate; a primary side circuit provided on said first semiconductor substrate; a secondary side circuit provided on said second semiconductor substrate; first capacitive insulation means provided on said first semiconductor substrate for electrically insulating and isolating between said primary side circuit and said secondary side circuit while permitting signal transmission between said primary side circuit and said secondary side circuit; second capacitive insulation means provided on said second semiconductor substrate for electrically isolating between said primary side circuit and said secondary side circuit while permitting signal transmission therebetween; a first lead frame for input and output of a signal to and from said primary side circuit; and a second lead frame for signal input and output to and from the secondary side circuit, wherein an external electrode of said first capacitive insulation means and an external electrode of said second capacitive insulation means are connected together by a third lead frame via a conductive adhesive body including more than one solder ball, and wherein said first semiconductor substrate, said second semiconductor substrate, said first lead frame, said second lead frame and said third lead frame are sealed by a dielectric resin.