Formation of Ni germano-silicide on single crystalline Si0.3Ge0.7/Si

Abstract

We have studied the Ni and Co germano-silicide on Si0.3Ge0.7/Si. The Ni germano-silicide shows a low sheet resistance of 4-6 Omega/square on both P+N and N+P junctions, which is much smaller than Co germano-silicide. In addition, small junction leakage currents of 3 x 10(-8) A/cm(2) and 2 x 10(-7) A/cm(2) are obtained for Ni germano-silicide on P+ N and N+ P junctions, respectively. The good germano-silicide integrity is due to the relatively uniform thickness as observed by cross-sectional TEM.