PHOTOCOUPLER

摘要

A photocoupler includes: a light emitting element; a light receiving element; an inner resin layer; and an outer resin layer. The light emitting element is driven by an input electrical signal. The light receiving element is configured to convert emission light of the light emitting element into an electrical signal. The inner resin layer includes a base resin and a curing agent. The base resin contains isocyanuric acid having an epoxy group. The curing agent contains an acid anhydride having an acid anhydride group. The inner resin layer covers the light emitting element and the light receiving element. Then outer resin layer encloses the inner resin layer and configured to block the emission light. Carbon atomic concentration increases and oxygen atomic concentration decreases with distance in depth direction of the inner resin layer from an interface.

主权项

1. A photocoupler comprising:
a light emitting element driven by an input electrical signal; a light receiving element configured to convert emission light of the light emitting element into an electrical signal for output; an inner resin layer including a base resin and a curing agent, the base resin containing isocyanuric acid having an epoxy group, the curing agent containing an acid anhydride having an acid anhydride group, the inner resin layer covering the light emitting element and the light receiving element; and an outer resin layer enclosing the inner resin layer and configured to block the emission light, carbon atomic concentration increasing and oxygen atomic concentration decreasing with distance in depth direction of the inner resin layer from an interface between the inner resin layer and the outer resin layer.