| 摘要 |
A light-emitting element ( 2 ) and a light-receiving element ( 3 ) are mounted, spaced from each other, on a main body ( 1 a) of a flexible board ( 1 ). These elements ( 2, 3 ) are encapsulated in a light-permeable light-emitting side molded resin section ( 6 a, 6 b) and a light-permeable light-receiving side molded resin section ( 6 c, 6 d), respectively. Positions of the light-emitting element ( 2 ) and light-receiving element ( 3 ) and orientations of a light-emitting surface of the light-emitting element ( 2 ) and a light-receiving surface of the light-receiving element ( 3 ) are freely settable owing to flexibility of the flexible board ( 1 ). A communication IC ( 4 ) is mounted on the flexible board ( 1 ) and between the elements ( 2, 3 ) and encapsulated in an IC side molded resin section ( 6 e, 6 f). An extended portion ( 1 b) extends from a midsection of the main body ( 1 a) of the flexible board ( 1 ) and has an external connection terminal ( 11 ) at its tip.
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