| 摘要 |
According to one embodiment, in a photo coupler, a light emitting device is mounted on a first mount-bed and electrically connected to a pair of first leads. A light receiving device is mounted on a second mount-bed, is electrically connected to a pair of second leads, and receives light emitted from the light emitting device by reflection. A first resin has a first refractive index and covers the light emitting device and the light receiving device. An opaque container has a concave portion to store the light emitting device and the light receiving device, and reflects the light emitted from the light emitting device at the concave portion. A second resin has a second refractive index lower than the first refractive index and fills a space between the first resin and the concave portion of the opaque container. A lid seals the concave portion of the opaque container.
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