To provide a surface light-emitting device with improved brightness, prevented from lowering of reliability.
The surface light-emitting device is composed of: a light guide plate having planar parts on both surfaces; a semiconductor light-emitting device housed in a notched part formed at a side part of the light guide plate, having light-emitting surfaces arranged so as to face light incident surfaces of the notched part; a flexible base plate arranged on the planar part at one side of the light guide plate, on which the semiconductor light-emitting device is mounted; and an adhesive layer formed between the light-emitting surface of the semiconductor light-emitting device and the light incident surface. The planar part and the flexible base plate are stuck by a double-side adhesive tape. In forming the adhesive layer, an adhesive before solidified being about to intrude between the flexible base plate and the light guide plate is intercepted by the double-side adhesive tape.
Tomoyasu Sakaguchi
Hiroki Naito