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Semiconductor device with impurity layer to prevent depletion layer expansion










Image Number 13 for United States Patent #7005688.

A semiconductor switching device includes a plurality of metal layers. At least one of the metal layers forming a Schottky junction with a semi-insulating substrate or an insulating layer on a substrate. The device also includes an impurity diffusion region, and a high-concentration impurity region formed between two of the metal layers or between one of the metal layers and the impurity diffusion region so as to suppress expansion of a depletion layer from the corresponding metal layer.








 
 
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