发明名称 |
IMAGING ARRAY WITH IMPROVED NOISE CHARACTERISTICS |
摘要 |
A pixel cell and imaging arrays using the same are disclosed. The pixel cell includes a photodiode that is connected to a floating diffusion node by a transfer gate that couples the photodiode to the floating diffusion node in response to a first gate signal. A shielding electrode shields the floating diffusion node from the first gate signal. An output stage generates a signal related to a charge on the floating diffusion node. In one aspect of the invention, the photodiode is connected to the floating diffusion node by a buried channel, and the shielding electrode includes an electrode overlying the channel and positioned between the transfer gate and the floating diffusion node. The shielding electrode is held at a potential that prevents charge from accumulating under the shielding electrode when the floating diffusion is at the second potential. |
申请公布号 |
EP2556661(A2) |
申请公布日期 |
2013.02.13 |
申请号 |
EP20110763195 |
申请日期 |
2011.02.28 |
申请人 |
BAE SYSTEMS IMAGING SOLUTIONS INC. |
发明人 |
FOWLER, BOYD |
分类号 |
H01L27/146;H04N5/217;H04N5/357;H04N5/374 |
主分类号 |
H01L27/146 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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