Patent ID: 8553125
Filing Date: 2013-10-08
Classification: H01L

Abstract:
1. A solid-state image sensor comprising: a plurality of pixels arranged in a pixel array area; a peripheral circuit arranged outside said pixel array area; a photoelectric converter arranged in said pixel array area; an amplification MOS transistor arranged in said pixel array area and having a gate electrode, said amplification MOS transistor outputting a signal according to charges generated by said photoelectric converter; a peripheral MOS transistor arranged in said peripheral circuit area, said peripheral MOS transistor having a gate electrode; an interlayer insulating film arranged to cover said photoelectric converter, said amplification MOS transistor and said peripheral MOS transistor, said interlayer insulating film being planarized by chemical metal polishing (“CMP”); a first insulating film arranged between said interlayer insulating film and an upper surface of said gate electrode of said amplification MOS transistor, said first insulating film extending to cover said photoelectric converter and a side surface of said gate electrode of said amplification MOS transistor without a side wall between said first insulating film and said side surface of said gate electrode of said amplification MOS transistor, and a second insulating film arranged between said interlayer insulating film and an upper surface of said gate electrode of said peripheral MOS transistor.