Patent ID: 9533880
Date: 2017-01-03
CPC Classifications: B23K,B81B,B81C,H01L

Claim:
1. A method for bonding a first substrate wafer and a second substrate wafer by creating an aluminum/germanium bond, a patterned aluminum layer disposed on the first substrate wafer, a patterned germanium layer disposed on the second substrate wafer, the method comprising: placing the first substrate wafer in a first chuck; placing the second substrate wafer in a second chuck; aligning the first substrate wafer and the second substrate wafer; and forming a eutectic bond between the patterned germanium layer and the patterned aluminum layer, wherein the eutectic bond is formed by applying a force across the first chuck and the second chuck, and ramping temperature of at least one of the first chuck or the second chuck over a eutectic temperature of the aluminum/germanium bond to a predetermined temperature that is between the eutectic temperature of the aluminum/germanium bond and 450 degrees Celsius (C.).