| 摘要 |
PURPOSE:To obviate the need of reflection mirrors and to improve positional accuracy, by securing a semiconductor laser element on the plane of a semiconductor substrate approximately perpendicular to the plane on which a photodetector is provided so that the semiconductor laser element emits optical flux approximately vertically to the plane on which the photodetector is provided. CONSTITUTION:A photodetector 4 for receiving optical flux from the outside is formed on a first plane of a semiconductor substrate 8, and a semiconductor laser element 2 is secured on the plane approximately perpendicular to the first plane so that the laser element 2 emits optical flux approximately vertically to the photodetector 4. According to such arrangement, the semiconductor laser element is allowed to emit optical flux to the outside approximately vertically to the plane on which the photodetector 4 is formed, without the need of providing any inclined plane in the semiconductor substrate. Further, it is possible to provide an inexpensive semiconductor device in which the photodetector is positioned with high accuracy with respect to the semiconductor laser element. |
