Patent ID: 8053815
Filing Date: 2011-11-08
Classification: H01L

Abstract:
1. A solid-state image pickup device comprising: a plurality of light receiving units arranged in a form of a matrix in a horizontal direction and a vertical direction; a transfer channel in a plurality of columns for transferring a signal charge accumulated in said light receiving units in the vertical direction; a first transfer electrode for reading a signal charge accumulated in said light receiving unit and transferring the signal charge in the vertical direction, the first transfer electrode being disposed above said transfer channel adjacent to a central part in the vertical direction of said light receiving unit; a second transfer electrode for transferring the signal charge transferred by the first transfer electrode in the vertical direction, the second transfer electrode being disposed above said transfer channel in a same layer as said first transfer electrode; first wiring for coupling said first transfer electrodes in a same row of said matrix to each other in the horizontal direction; and second wiring for coupling said second transfer electrodes in a same row of said matrix to each other in the horizontal direction; wherein film thickness of said first transfer electrode and said second transfer electrode is smaller than film thickness of said first wiring and said second wiring when said first wiring and said second wiring are formed by polysilicon, said second wiring is disposed on said second transfer electrode, said first wiring includes a horizontal part disposed in a layer above said second wiring and extending in the horizontal direction and a branch part extending from said horizontal part in a form of a branch in the vertical direction and extending on said first transfer electrode, and said branch part is bent from said horizontal part toward said first transfer electrode and extends on said first transfer electrode such that a space of a transparent interlayer insulating film is formed over said branch part extending on the first transfer electrode.