| 摘要 |
PROBLEM TO BE SOLVED: To provide a light receiving element which can reduce the occupying area of a photosensitive portion. SOLUTION: The photosensitive portion 2 which generates the charges of a quantity corresponding to photoreceived intensity, is formed in a semiconductor substrate 10. A sensitivity control electrode 13 is arranged on the light receiving surface of the photosensitive portion 2, and the potential of the photosensitive portion 2 is adjusted according to the value of a control voltage applied to the sensitivity control electrode 13. The photosensitive portion 2 comprises a holding region 14 forming a potential well in a state in which the control voltage is not applied to the sensitivity control electrode 13, and an adjusting region 15 which is prepared at a portion different from the holding region 14 within a surface along the light receiving surface of the photosensitive portion 2, and forms the potential well with the holding region 14 in a state in which the control voltage is applied to the sensitivity control electrode 13. Therefore, the opening area of the potential well formed in the photosensitive portion 2, can be changed depending on the existence of application of the control voltage to the sensitivity control electrode 13. COPYRIGHT: (C)2009,JPO&INPIT
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