| 摘要 |
PROBLEM TO BE SOLVED: To make unnecessary the forming of lead terminals and to reduce the working man-hour by placing an electric circuit board at the center levels of lead terminals of the packages of both photoelectric and electro-optical elements and connecting both lead terminals together on both sides of the circuit board without bending the terminals. SOLUTION: An electrooptical conversion element and a photoelectric conversion element are stored in the airtight packages 2 and 5 respectively. A transmission circuit 1 and a reception circuit 4 are mounted on an electric circuit board 6. The centers of lead terminals of both packages 2 and 5 are set at the same level as the thickness center of the substrate 6, and the packages 2 and 5 are connected to the patterns 8 formed on both sides of the board 6 to hold the board between them. The led terminals 9 and 10 connected to the electrooptical conversion element and the lead terminals 11 and 12 connected to the photoelectric conversion element are shielded by the conductors provided on the surface and rear surface sides of the board 6 respectively. |
