Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Reexamination Certificate
2011-03-22
2011-03-22
Pyo, Kevin (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
C250S214100, C257S292000, C257SE27133
Reexamination Certificate
active
07910872
ABSTRACT:
A sensor includes a substrate, a floating diffusion node in the substrate, a photodiode in the substrate laterally spaced apart from the floating diffusion region and a transfer transistor coupling the photodiode and the floating diffusion region. The sensor further includes a photodiode control electrode disposed on the photodiode and configured to control a carrier distribution of the photodiode responsive to a control signal applied thereto. The photodiode may include a first semiconductor region of a first conductivity type disposed on a second semiconductor region of a second conductivity type, the floating diffusion region may have the second conductivity type and the photodiode control electrode may be disposed on the first semiconductor region. The photodiode may be configured to receive incident light from a side of the substrate opposite the photodiode control electrode. The transfer transistor may include a gate electrode on a channel region in the substrate and the photodiode control electrode and the transfer transistor gate electrode may be separately controllable. In further embodiments, the photodiode control electrode comprises an extension of the transfer transistor gate electrode.
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Ahn Jung-chak
Kim Yi-tae
Myers Bigel Sibley & Sajovec P.A.
Pyo Kevin
Samsung Electronics Co,. Ltd.
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