1986-06-03
1989-03-21
Sikes, William L.
357 34, 357 35, 357 40, 357 43, 357 45, 357 47, 357 50, H01L 2714, H01L 3100
Patent
active
048148466
ABSTRACT:
A photoelectric converting device is provided with photoelectric converting cells. Each cell is provided with a semiconductor transistor and a capacitor. The transistor is composed of two main electrode semiconductor areas of a first type and a control electrode semiconductor area of opposite conductivity type. The capacitor controls the potential of said control electrode area in a floating state. The cell is capable of an accumulating operation for accumulating photo-induced carriers in said control electrode area, a read-out operation for reading an output controlled by a voltage generated by said accumulation, and a refreshing operation for dissipating the carriers accumulated in said control electrode area, by means of controlling the potential of said control electrode area in floating state through said capacitor. The device comprises a semiconductor area of a high concentration and of the same conductive type as that of said control electrode area in an element islation area which is provided in said main electrode area for electrically isolating said photoelectric converting cells, thereby constituting a transistor structure in combination with said control electrode area.
REFERENCES:
patent: 3532945 (1970-10-01), Weckler
patent: 3911269 (1975-10-01), Hart
patent: 4450466 (1984-05-01), Nishizawa
patent: 4686554 (1987-08-01), Ohmi et al.
Matsumoto Shigeyuki
Sugawa Shigetoshi
Canon Kabushiki Kaisha
Epps Georgia Y.
Sikes William L.
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