| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method of manufacturing a photointerrupter that is capable of being manufactured at low cost, has excellent detectability, is surface-mountable on a printed circuit board, and is small in size.SOLUTION: An infrared light LED 2 and a phototransistor 3 are mounted on an aggregate substrate 1, a shield frame aggregate plate 4 is bonded to the aggregate substrate 1 while being aligned with the aggregate substrate 1, resin sealing is performed using a transparent resin, a reflective layer is formed by uniformly applying a light reflective resin to an upper surface of the shield frame aggregate plate 4, a light shielding resin shield layer 7 is further formed to cover the reflective layer, and a gap 8 between a light emission part and a light reception part, an emission slit 441, and an incident slit 431 are formed through cutting work using a dicer blade.</p> |
