Patent ID: 8004589
Filing Date: 2011-08-23
Classification: H01L

Abstract:
1. A solid state imaging device comprising: a plurality of photoelectric conversion elements arranged on a semiconductor substrate in a one-dimensional or two-dimensional array; a plurality of read gate electrodes for reading the signal charges obtained from the photoelectric conversion elements; a plurality of transfer gate electrodes for transferring the signal charges read by the read gates to a channel region; a plurality of storage electrodes for storing the signal charges transferred through transfer gates in the channel region; a plurality of barrier electrodes for transferring the signal charges stored under the storage electrodes to a region under the storage electrodes adjacent in the channel region, and a plurality of diffusion layers having different depths, provided under the barrier electrodes, wherein both end portions of the plurality of storage electrodes and the plurality of barrier electrodes are arranged perpendicularly to a transfer direction of signal charges in the channel region; the central portions of the plurality of storage electrodes and the plurality of barrier electrodes are arranged obliquely to the transfer direction of signal charges; the plurality of diffusion layers under the barrier electrodes have different depths sequentially in parallel direction to a transfer direction of signal charges; both end portions of the diffusion layers are arranged perpendicularly to a transfer direction of signal charges; and central portions of the diffusion layers are arranged obliquely to a transfer direction of signal charges.