Patent ID: 7091463
Filing Date: 2006-08-15
Classification: H01L

Abstract:
1. A solid state image pickup device comprising: a semiconductor substrate; a number of photoelectric conversion elements disposed in one surface of said semiconductor substrate in rows and columns in a pixel shift layout, in which each of photoelectric conversion elements of an even column is shifted by about a half pitch along the column direction from those of an odd column, and each of photoelectric conversion elements of an even row is shifted by about a half pitch along the row direction from those of an odd row; a plurality of first charge transfer channels formed in the surface of said semiconductor substrate, each of said first charge transfer channels running in a zigzag manner along a corresponding photoelectric conversion element column, and extending into spaces between pairs of vertically adjacent photoelectric conversion elements; a plurality of first transfer electrodes disposed on an electrically insulating film formed on the surface of said semiconductor substrate along each photoelectric conversion element row, adjacent first transfer electrodes being disposed spaced apart from each other, and each of said first transfer electrodes having a first main electrode layer disposed crossing each of said first charge transfer channels as viewed in plan and first subsidiary electrode layers formed on side walls of the first main electrode layer; a second charge transfer channel formed in the surface of said semiconductor substrate and being electrically connectable to each of said first charge transfer channels; and a plurality of second transfer electrodes disposed on the electrically insulating film formed on the surface of said semiconductor substrate, each of said second transfer electrodes crossing said second charge transfer channel.