Charge coupled device type solid state pickup apparatus an method of operating the same
OwnerSang-Il Junginventor
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Abstract
A solid state pickup apparatus is described, which can weaken a dark current. The pickup apparatus includes an optical shield layer with a number of windows corresponding to the light receiving parts, and a negative voltage applying device. Each of the light receiving parts has a solid state pickup device where an P-type diode layer is formed between an N-type diode layer and a gate insulating layer. The negative voltage applying device is formed at the optical shield layer in order to apply a negative voltage to the P-type diode layer.
Claims8
A charge coupled device type solid state pickup apparatus, comprising:
- a light receiving part having a solid state pickup device in which a P-type diode layer is formed between an N-type diode layer and a gate insulating layer;
- a vertical transmission unit connected to the light receiving part;
- a horizontal transmission unit connected to the vertical transmission unit;
- a gate electrode for transmitting charges;
- and
- a conductive optical shield formed over the light receiving parts, having a window corresponding to the light receiving part;
- a peripheral circuit for applying at least a first voltage to the solid state pickup device;
- and
- a voltage applying device for applying a second voltage to the optical shield,
- wherein the second voltage is a negative voltage.
A method of operating a charge coupled device type solid state pickup apparatus, comprising:
- continuously applying a first voltage to a terminal in the solid state pickup apparatus;
- and
- continuously applying a second voltage of a constant level to a terminal of an optical shield in the solid state pickup apparatus,
- wherein the second voltage is a negative voltage.
Dependencies are inferred from the claim text.