Patent ID: 8912034

Claim:
A method for manufacturing an energy ray detection device including an active part and a contact portion connected to the active part, the active part including a semiconductor region having a first conductivity type where signal charge generated in accordance with energy rays resides as majority carriers, the semiconductor region including a first region disposed below a first area on a surface of a semiconductor substrate, a second region disposed below a second area on the surface and connected to the contact portion, and a third region disposed below a third area on the surface between the first area and the second area, the method comprising: forming a buffer film on the semiconductor substrate, the buffer film covering the first area and the third area, a portion of the buffer film that covers the third area having a thickness smaller than a portion of the buffer film that covers the first area; and forming the first region and the third region, comprising performing ion implantation of impurities having the first conductivity type into the semiconductor substrate through the buffer film.