Patent ID: 8697542
Filing Date: 2014-04-15
Classification: B23K,H01L

Abstract:
1. A method of bonding a die to a base technology wafer, comprising: providing a device wafer having a front, a back, at least one side, and at least one through substrate via, wherein the back is comprised of a substrate material; providing a carrier wafer having a front, a back, and at least one side; preparing the carrier wafer for temporary bonding to the device wafer, comprising: preparing the device wafer for temporary bonding to the carrier wafer, comprising: bonding the front of the device wafer to the carrier wafer using an adhesive; removing, from the back of the device wafer, the substrate material; wet etching, from the back of the device wafer, to expose at least one feature made from a metallization scheme; processing the back of the device wafer to create at least one backside redistribution layer; removing the device wafer from the carrier wafer; dicing the device wafer into individual die; providing a base technology wafer having a front, a back, and at least one side; coating the front of the base technology wafer with a sacrificial adhesive; placing the front of the individual die onto the front of the base technology wafer; and bonding the individual die to the base technology wafer.