Patent ID: 8592285
Filing Date: 2013-11-26
Classification: B23K,B81B,B81C

Abstract:
1. A method of bonding a semiconductor substrate, comprising: bonding a first semiconductor substrate with a second semiconductor substrate by eutectic bonding with pressurization and heating, an aluminum containing layer primarily made of aluminum and a germanium layer in an overlaid state being interposed between a bonding surface of the first semiconductor substrate and a bonding surface of the second semiconductor substrate; film-forming the aluminum containing layer on the bonding surface of the second semiconductor substrate and film-forming the germanium layer on the aluminum containing layer; receding an outer end of the germanium layer inward with respect to an outer end of the aluminum containing layer as to the aluminum containing layer and the germanium layer in the overlaid state; and broadening a pattern width of the aluminum containing layer than a pattern width of the germanium layer.