Patent ID: 7473948

Claim:
A method of manufacturing a photoelectric conversion device having a semiconductor substrate of a first conduction type, and having a photoelectric conversion element having an impurity region of the first conduction type which accumulates a signal carrier generated through photoelectric conversion, and a plurality of impurity regions of a second conduction type opposite to the first conduction type, said method comprising a step of forming the impurity region of the first conduction type and the plurality of impurity regions of the second conduction type by performing ion implantations in the semiconductor substrate a certain number of times, wherein said ion implantations of the certain number of times include a first ion implantation of forming the impurity region of the first conduction type, and second, third, and fourth ion implantations of forming the plurality of impurity regions of the second conduction type, wherein respective depths of the ion implantations of the certain number of times in the depth direction from an ion implantation surface of the semiconductor substrate are set in an order of the first, second, third and then fourth ion implantations, and respective peak impurity concentrations of the second conduction type impurity regions formed by the second, third, and fourth ion implantations are C 1 , C 2 , and C 3 have a relationship of: C3>C1>C2.