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Semiconductor device having SiGe spacer under an active layer

Image Number 7 for United States Patent #5955745.

A semiconductor device which does not allow production of leak current or a drop of the Early voltage and includes a diffused layer having a reduced depth. A silicon layer containing an impurity of a second conduction type is formed on a semiconductor substrate of a first conduction type, and a spacer layer formed from a single crystalline silicon layer containing germanium is provided under the silicon layer.

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