Photoelectric conversion apparatus and imaging system using the photoelectric conversion apparatus

A photoelectric conversion apparatus comprising:

• a first photoelectric conversion element having a semiconductor region of a first conductivity type capable of accumulating a signal charge;
• a second photoelectric conversion element having a semiconductor region of the first conductivity type, arranged adjacent to the first photoelectric conversion element in a first direction;
• a third photoelectric conversion element having a semiconductor region of the first conductivity type, arranged adjacent to the first photoelectric conversion element in a second direction different from the first direction;
• a plurality of transistors;
• a first semiconductor region of a second conductivity type having a first width, and arranged between the semiconductor region of the first conductivity type of the first photoelectric conversion element and the semiconductor region of the first conductivity type of the second photoelectric conversion element;
• a second semiconductor region of the second conductivity type having a second width, and arranged between the semiconductor region of the first conductivity type of the first photoelectric conversion element and the semiconductor region of the first conductivity type of the third photoelectric conversion element;
• and
• a third semiconductor region of the second conductivity type having a third width broader than the first and second widths, wherein the plurality of transistors are provided in the third semiconductor region.