| 摘要 |
An optical semiconductor device comprises a lead frame, a mount bed integrated with the lead frame, an optical semiconductor element mounted on the mount bed with an adhesive agent interposed therebetween, and a light-transmitting resin for sealing the optical semiconductor element. A surface of the mount bed mounting the optical semiconductor element has a concave portion and has one end of a discharge hole penetrating the mount bed in the concave portion.
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