| 摘要 |
PURPOSE:To obtain the titled device excellent in both characteristics of the light receiving sensitivity and the rise-fall time of a voltage impressed on the photo diode, by providing a means of making light incident to a direction parallel with the P-N junction plane. CONSTITUTION:A permeable insulation film 6 is formed on the side surface of a pellet. Light comes from the side surface. Since this structure enables the light receiving sensitivity to be determined by the lateral length of an operating layer 2, and the rise-fall time of a voltage impressed on the photo diode to be determined by the thickness of the operating layer 2, both of the characteristics can be improved at the same time. |
