| 简介 |
MOS transistors and methods for fabricating MOS transistors are provided. One exemplary method comprises providing a substrate having a silicon-comprising surface region. A first metal silicide layer is formed overlying the silicon-comprising surface region. Ion implantation is used to implant rare earth metal ions at an interface between the first metal silicide layer and the silicon-comprising surface region. The substrate is heated to form a second rare earth metal silicide layer disposed below the first metal silicide layer. |
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