Photocoupler, method for producing the same, and electronic device equipped with the photocoupler

摘要

A photocoupler comprises a light emitting element 15 and a light detecting element 16 which are both mounted on the same surface of lead frames 13, 14. The light emitting element 15 and the light detecting element 16 are enclosed in a transparent resin 19, such that the transparent resin 19 can serve as an optical path between the light emitting element 15 and the light detecting element 16. In order to hold a low-viscosity transparent resin 19, a retention frame 12 is disposed around the light emitting element 15 and the light detecting element 16.