Photoelectric-conversion apparatus and image-pickup system

A photoelectric-conversion apparatus comprising:

• a photoelectric-conversion area having a plurality of photoelectric-conversion elements configured to convert incident light into electrical charges;
• a plurality of floating-diffusion areas;
• a plurality of transfer-MOS transistors configured to transfer electrical charges of said photoelectric-conversion element to said floating-diffusion area;
• a plurality of amplification-MOS transistors configured to read and transmit a signal generated based on the transferred electrical charges to an output line;
• and
• an antireflection film provided on a light-receiving surface of said photoelectric-conversion element and a plurality of wiring layers,
• wherein one gate of said amplification-MOS transistor is electrically connected to one floating-diffusion area by one conductor provided in a single contact hole, where the electrical connection is not via said plurality of wiring layers, and
• wherein said anti-reflection film is provided, so as to cover at least a part of each of an upper part of said floating-diffusion area and an upper part of the gate of said amplification-MOS transistor except a base part of said contact hole.