Patent ID: 8415724
Filing Date: 2013-04-09
Classification: H01L

Abstract:
1. A photoelectric conversion apparatus comprising: a first semiconductor region of the first conduction type; a second semiconductor region of a second conduction type arranged above the first semiconductor region; a third semiconductor region of the second conduction type having an impurity concentration higher than an impurity concentration of the second semiconductor region, arranged above the second semiconductor region; a fourth semiconductor region of the first conduction type arranged above the third semiconductor region; a fifth semiconductor region of the first conduction type arranged so as to surround the third semiconductor region; an amplifying transistor for reading out signals from a photoelectric conversion unit; a sixth semiconductor region of the first conduction type arranged below a gate electrode of the amplifying transistor; a plug for supplying a reference voltage to the sixth semiconductor region; a seventh semiconductor region of the first conduction type, which is arranged below the plug so as to be in contact with the plug and electrically connected to each of the forth semiconductor region, the fifth semiconductor region, the sixth semiconductor region and the first semiconductor region, and an eighth semiconductor region of the first conduction type, having an impurity concentration lower than an impurity concentration of the seventh semiconductor region, and arranged between the seventh semiconductor region and the third semiconductor region.