| 摘要 |
PROBLEM TO BE SOLVED: To prevent irregularity in performance of a light-receiving/light-emitting element, reduction in a detection efficiency and the like from being generated by a method wherein a recess part provided in a case is formed of a chip arrangement part for arranging a light-receiving/light-emitting chip and a surface-shaped adjustment part having an aperture diameter larger than that of the chip arrangement part into a step shape and a resin guide groove is provided along the outer periphery of the bottom of the adjustment part. SOLUTION: A surface-shaped adjustment part 3b is formed as an aperture diameter larger than that of a chip arrangement part 3a and is formed almost concentrically with the part 3a. A recess part 3 is formed into a two-step step shape having step parts 3d generated by the bottom of the part 3b. Thereby, by making molding resin flow in a resin guide groove, the deformation of the surface of the part 3a, which is hitherto generated by the wall surfaces of the part 3a and the surface tension of the molding resin, is eliminated and a plane is obtained on the surface of the part 3a. Moreover, by making the resin flow in the groove, the thickness of the part 3a is also held constant during the time of filling the groove. Accordingly, an irregularity in the performance of a light-receiving/light-emitting element, which is caused by the molding resin, reduction in a detection efficiency and the like can be prevented from being generated. |
