Patent ID: 6215139
Filing Date: 2001-04-10
Classification: H01L

Abstract:
An amplifying solid-state image sensor comprising:a semiconductor substrate; anda plurality of unit pixels arranged on the semiconductor substrate in a two-dimensional manner, whereineach of the plurality of unit pixels includesa photodiode for performing photoelectric conversion,a storage diode for storing electric signal charge obtained by the photodiode,an amplifying transistor for amplifying the electric signal charge stored in the storage diode, anda signal reading section for reading a signal voltage from the amplifying transistor, and whereineach of the plurality of unit pixels has a first active region and a second active region in which the second active region has the same conductivity type as that of the semiconductor substrate and an impurity concentration higher than that of the semiconductor substrate,the photodiode in each of the unit pixels is formed in the first active region, andthe amplifying transistor is formed in the second active region.