Patent ID: 6023293
Filing Date: 2000-02-08
Classification: H01L

Abstract:
An active type solid-state imaging device, comprising:an image sensor portion having an active type photoelectric conversion element, formed in a first semiconductor layer of a second conductivity type in a semiconductor substrate of a first conductivity type; anda driving circuit for driving the image sensor portion, formed in a second semiconductor layer of the second conductivity type in the semiconductor substrate,wherein the active type photoelectric conversion element includes:a transistor which accumulates signal charges generated from incident light on a surface of the first semiconductor layer and outputs changes in an electric signal in accordance with the accumulated signal charges; anda gate region provided adjacent to the transistor, which includes: a part of the first semiconductor layer; a first insulating film formed on the part of the first semiconductor layer; and a gate electrode provided on the first insulating film, and which transfers the accumulated signal charges from the surface of the first semiconductor layer to an inside portion of the first semiconductor layer based on a voltage applied to the gate electrode, andthe first semiconductor layer and the second semiconductor layer are formed so as to be separated from each other on the semiconductor substrate.