Patent ID: 6087691
Filing Date: 2000-07-11
Classification: H01L

Abstract:
A semiconductor device, comprising:a semiconductor thin film of a first conductivity type provided on a semiconductor substrate of said first conductivity type;a first impurity diffusion layer of said first conductivity type provided in a form of layer in said semiconductor thin film;a second impurity diffusion layer of said first conductivity type provided in a form of layer at a depth shallower than a depth at which said first impurity diffusion layer is provided in said semiconductor thin film; anda minority-carrier source for generating minority carriers of a second conductivity type opposite to said first conductivity type and an impurity diffusion region of said first conductivity type each selectively provided in said semiconductor thin film,wherein each of impurity concentrations of said impurity diffusion region and said first and second impurity diffusion layers is higher than that of said semiconductor thin film, andsaid impurity diffusion region extends up to such a depth as to reach said first impurity diffusion layer from a surface of said semiconductor thin film.