Patent ID: 6861675

Claim:
An optically coupled semiconductor device comprising: a multi-layer wiring substrate which is constituted by stacking a second wiring substrate on a first wiring substrate and which has an opening formed in the second wiring substrate; a mount electrode and an electrode for wire-bonding which are formed on a top main face of the first layer and which are disposed at diagonal positions of the opening formed in the second wiring substrate; a light-emitting device whose one terminal is electrically connected to the mount electrode and whose other terminal is electrically connected to the electrode for wire-bonding electrode via a wire and which is arranged so that a light-emitting face thereof may face the opening; a first electrode pad and a second electrode pad which are provided on the top main face of the second wiring substrate in such a manner as to sandwich the opening formed in the second wiring substrate; a photo-receptor element which is arranged in such a manner as to block the opening formed in the second wiring substrate and which is electrically connected to the first electrode pad so that a light-receiving face thereof may face the light-emitting face of the light-emitting device; a switching element which is arranged in such a manner as to block the opening formed in the second wiring substrate and which is electrically connected to the second electrode pad so as to face the wire; and a sealant which seals the opening formed in the second wiring substrate.