Solid state image pickup device with LDD structure and reset transistor

A solid state image pickup device comprising:

• a photoelectric conversion unit including a second semiconductor region of a second conductive type arranged in a first semiconductor region of a first conductive type, and a third semiconductor region of the first conductive type disposed at a light incident side of said second semiconductor region,
• a fourth semiconductor region of the second conductive type having LDD structure arranged in said first semiconductor region;
• and
• a charge transfer unit in said first semiconductor region located between said photoelectric conversion unit and said fourth semiconductor region, an insulation layer provided on said first semiconductor region and a control electrode provided on said insulation layer, for transferring a signal charge accumulated in said photoelectric conversion unit to said fourth semiconductor region;
• wherein said second semiconductor region is arranged between said first semiconductor region included in said charge transfer unit and an end portion on a charge transfer unit side of said third semiconductor region, wherein said second semiconductor region is arranged so as to extend to a region under said control electrode;
• and
• wherein said fourth semiconductor region is a floating diffusion area, a gate electrode of an amplification transistor which amplifies signal charge transferred to said floating diffusion area is connected to said floating diffusion area;
• and
• said solid state image pickup devise further comprising a reset transistor which resets a potential of said fourth semiconductor region to a predetermined potential.