| 摘要 |
PROBLEM TO BE SOLVED: To realize stable mounting by soldering a module on a PCB(Printed Circuit Board) by soldering three terminals. SOLUTION: An optical element (LED 8) and an IC 9 are mounted on a base substrate 17 and are sealed with light transmissive sealing resin 10, an edge of base substrate 17 includes an extending part 18 projected from both external sides of a plastic module to accommodated an optical element module (light emitting module 16), a through-hole electrode 19 is provided to the extending part 18, and this through-hole electrode is electrically connected, by soldering, to external connecting electrode formed on the printed circuit board 12 via the through-hole electrode 19. The through-hole electrode 19 is located for four terminals in total (19a: Vin, 19b: Vcc, 19c: GND, and 19d: Non- contact) with two terminals on both sides of extending part. The same configuration is also formed for a receiving optical module. Stable mounting can be realized for the PCB by positioning two terminals on both sides of the extending part 18. Accordingly, this mounting method can be applied to thin mounting elements. |
