Patent ID: 7203387

Claim:
A method to form a VLSI-photonic heterogeneous system device, said method comprising: providing an optical substrate comprising at least one passive optical component formed therein wherein said optical substrate is a wafer comprising a plurality of die, wherein each said die comprises at least one said passive optical component; providing an electronic substrate comprising at least one active electronic component formed therein wherein said electronic substrate is a wafer comprising a plurality of die, and wherein each said die comprises at least one said active electronic component; forming a plurality of metal pillars through said optical substrate and protruding out a first surface of said optical substrate; forming a plurality of metal pads on a first surface of said electronic substrate; and bonding together said optical substrate and said electronic substrate by a method further comprising: aligning said first surfaces of said optical and electronic substrates such that said protruding metal pillars contact said metal pads; and thermally treating said optical and electronic substrates such that said metal pillars bond to said metal pads.