Patent ID: 8541255
Filing Date: 2013-09-24
Classification: H01L

Abstract:
1. A method of manufacturing a solid-state imaging device, the method comprising the steps of: forming lower first and second conductive-type semiconductor regions on a surface of a substrate, the conductivity of said substrate being opposite to the conductivity of said lower second conductive-type semiconductor region; forming a gate electrode between said lower first and second conductive-type semiconductor regions, the conductivity of said lower first conductive-type semiconductor region being opposite to the conductivity of said lower second conductive-type semiconductor region, wherein said lower first and second conductive-type semiconductor regions and said substrate are insulated from said gate electrode, wherein an upper first conductive-type semiconductor region is on said lower first conductive-type semiconductor region, an upper second conductive-type semiconductor region being on said lower second conductive-type semiconductor region, wherein prior to the step of forming the lower first and second conductive-type semiconductor regions, the method further comprising: forming a dummy electrode on said surface of the substrate, said dummy electrode being between a photoelectric conversion region of a transistor and a readout region of the transistor; and thereafter, depositing a semiconductor layer onto said surface of the substrate, said semiconductor layer becoming said lower first and second conductive-type semiconductor regions, wherein said dummy electrode is between said upper and lower first conductive-type semiconductor regions, said dummy electrode being between said upper and lower second conductive-type semiconductor regions, wherein said upper first conductive-type semiconductor region is insulated from said dummy electrode, said dummy electrode being insulated from said upper second conductive-type semiconductor region, wherein removal of said dummy electrode forms an electrode portion, an electric conductor embedded in said electrode portion becoming said gate electrode.