Surface-mounted photocoupler

A surface-mounted photocoupler comprising:

• a light-transparent substrate including a flat mounting portion and edge portions;
• first and second electrode patterns formed on one and other surfaces of said flat mounting portion, respectively;
• a light-emitting element attached to said one surface of mounting portion and electrically connected to said first electrode patterns;
• a light-receiving element attached to said other surface of said mounting portion, so as to oppose said light-emitting element across said substrate, and electrically connected to said second electrode patterns;
• and
• a synthetic resin covering said light-emitting element and said light-receiving element and formed in a rectangular configuration;
• wherein said edge portions are bent and affixed along the outer periphery of said syntectic resin covering one of said light-emitting element and light-receiving element.

A surface-mounted photocoupler comprising:

• a light-transparent substrate including a mounting portion one side of which is projected to form a protrusion and the opposite side of which forms a recess and a horizontal portion at the center of said mounting portion;
• first and second electrode patterns formed on one and other surfaces of said horizontal portion of said mounting portion, respectively;
• an LED formed in a rectangular configuration and having a bottom side fixed to said one surface of said horizontal portion of said mounting portion, a light-emitting portion formed on said bottom side, side faces and electrodes formed on said side faces and electrically connected to said first electrode patterns;
• a phototransistor formed in a rectangular configuration and having a bottom side fixed to said other surface of said horizontal portion of said mounting portion, so as to oppose said LED across said horizontal portion, and a base, an emitter and a collector formed on the bottom side, said emitter and collector being electrically connected to said second electrode patterns, and said base facing said light-emitting portion of said LED through said horizontal portion of said mounting portion;
• and
• a synthetic resin coveting said LED and said phototransistor.