| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical semiconductor device with high signal intensity by employing the focal design of a lens which takes into consideration the reflection on a reflective surface, related to a device wherein an optical signal is deflected on a reflective surface with a lens provided on the side surface of a sealing body. SOLUTION: Light-receiving elements 2 and 3 are fixed on islands 21 and 22, which is molded with a transparent resin to provide a sealing body 24. A groove 26 is formed at the upper part of each element 2 and 3 to form a reflecting surface 27, and a signal light 6 is reflected on the reflecting surface 27 and allowed to enter/exit from one side surface 25b of the sealing body 25. A lens 28 is provided on one side surface. A centerline 41 of the lens 28 is positioned almost at the center of the pattern of a photodiode PD and the reflecting surface 27. The focal point of the lens 28 is positioned almost on the surface of these elements after taking deflection on the reflection surface 27 into due consideration. |
