| 摘要 |
<p>A receiving optics having a photodiode as a receiving region formed on a part of a semiconductor substrate and, provided on a part of the semiconductor substrate other than the receiving region, an electrode for arranging a light emitting element, characterized in that a high concentration impurity layer is provided under the surface of the semiconductor substrate along the perimeter of the electrode for arranging a light emitting element. The high concentration impurity layer prevents the undesirable effect of the voltage applied to the electrode for arranging a light emitting element on the output of the receiving optics. A photosemiconductor device which has a light emitting element and a receiving optics, and has a receiving region provided parallel with the direction of emission in the light emitting element, characterized in that in plane view, the light emitting element is arranged so as for the emitting point thereof to overlap with at least a part of the receiving region. In the photosemiconductor device, the operation for attaching a light emitting element is easy even when it has a low emitting point and the variation of light receiving sensitivity is suppressed.</p> |
