| 摘要 |
PURPOSE:To give the higher sensitivity on the comparatively shorter wavelength side, by providing a light screening so that a light enters through only the vicinity of the peripheral part of a PN junction plane. CONSTITUTION:The peripheral part 6a of the PN junction plane 6 is formed at the location slightly farther than the periphery of a window 3, by the diffusion not only in the direction of the depth but also in the lateral direction when a P layer is formed. Therefore, the light enters into only a long and narrow region from the peripheral part 6a of the PN junction 6 to the periphery of an electrode 13. As a result, the sensitivity to the comparatively longer wavelength side is decreased, and the sensitivity to the shorter wavelength side is relatively enhanced. |
