| 摘要 |
<p>PURPOSE:To produce miniature photo-interrupter requiring no holder cases by a method wherein the creeping of photo shielding resin to light emitting and receiving windows is prevented by pushing forth devices at the time of molding with the photo shielding resin. CONSTITUTION:A chip 1 is mounted on a lead frame 2, wire-connected 3 to the other lead frame 2, and primarily molded with the photo transmitting resin 4. A light emitting element device 5 and a light receiving element device 5' after primary molding are made opposed and inserted to another cutting die case, and then integral molding is carried out by casting photo shielding resin. Grooves 10 provided respectively in the backs of the devices correspond to the projection provided in the cutting die case at the time of the secondary molding. The primary molded parts of the devices are pushed forth by this projection, and then the part 11 serving as the light emitting and receiving window is pressed on the mold and prevents the creeping of the resin 9 to the window part.</p> |
