how suppression of the change to the current change of the amplification factor of the semiconductor device, the photoelectric conversion element and a method of manufacturing a semiconductor device

摘要

PROBLEM TO BE SOLVED: To amplify an electric current which changes at a level of several digits with a fixed amplification factor without using a complicated circuit.;SOLUTION: The semiconductor device which includes a first semiconductor region having a first conductivity type, a second semiconductor region which is provided in contact with the first semiconductor region and has a conductivity type opposite to that of the first semiconductor region, and a third semiconductor region which is provided in contact with the second semiconductor region on a second surface and has the first conductivity type further includes a fourth semiconductor region which is provided in contact with the second semiconductor, surrounds the third semiconductor region so as to be separated from each other, and has an impurity concentration higher than that of the second semiconductor region.;COPYRIGHT: (C)2013,JPO&INPIT