Patent ID: 7541211

Claim:
A manufacturing method of a photoelectric conversion device including a silicon substrate, a plurality of photoelectric conversion elements each including a charge storage region on a principal plane of the silicon substrate, and a plurality of transfer MOS transistors for transferring charge from the charge storage regions, wherein the principal plane has an off-angle orientation forming an angle θ with at least two planes arranged in opposition to each other and perpendicular to a reference (1 0 0) plane within a range of 3.5°≦θ≦4.5°, and wherein the at least two planes form a two-plane direction, the method comprising: forming the charge storage regions by injecting ions at an ion injecting direction into the plurality of photoelectric conversion elements, the ion injecting direction being a same direction for respective ones of the plurality of photoelectric conversion elements, such that the ion injecting direction forms an angle φ relative to a direction perpendicular to the principal plane within a range of 0°<φ≦45°, and such that a direction of a projection of the ion injecting direction to the principal plane forms an angle α with the two plane direction within a range of 0°<α<90°, wherein for each charge storage region: a part of the charge storage region is arranged under a part of a gate electrode of a corresponding transfer MOS transistor, and a direction of the part of the charge storage region arranged under the gate electrode as seen from a corresponding photoelectric conversion element forms the angle α with the two plane direction within a range of 40°≦α≦50°.