Patent ID: 7755116
Filing Date: 2010-07-13
Classification: H01L

Abstract:
1. An image sensor integrated circuit, comprising: a plurality of photodetectors generating electrons excited by incident photons, each of the plurality of photo detectors including: a plurality of nodes, wherein each of the plurality of photodetectors has a corresponding node of the plurality of nodes; a plurality of transfer devices controlling a transfer of the electrons from said each of the plurality of photodetectors to the corresponding node, the plurality of transfer devices having a transfer device background p-type concentration under a control terminal, each of the plurality of transfer devices including: a first plurality of p-type regions having a concentration stronger than the transfer device background p-type concentration, wherein each of the first plurality of p-type regions has a lateral position only partly under the control terminal of a transfer device of the plurality of transfer devices, the first plurality of p-type regions controlling the transfer of electrons from a photodetector of the plurality of photodetectors to the corresponding node of the photodetector, and each of the first plurality of p-type regions has the lateral position at least partly under the corresponding node, and the first plurality of p-type regions has the lateral position stopping short of the plurality of photodetectors and stopping short of a plurality of reset devices; the plurality of reset devices, wherein each of the plurality of nodes has a corresponding reset device of the plurality of reset devices, and said each of the plurality of nodes is reset when the corresponding reset device is active; row and column circuitry; and a plurality of signal devices coupling the plurality of nodes to the row and column circuitry.