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

摘要

A photocoupler comprises a light emitting element and a light detecting element which are both mounted on lead frames. The light emitting element and the light detecting element are enclosed in a transparent resin 19, such that the transparent resin can serve as an optical path between the light emitting element and the light detecting element. A retention frame is disposed around the light emitting element and the light detecting element to hold a low-viscosity resin. Also an electronic device includes a photocoupler.