| 摘要 |
PURPOSE: To prevent the scattering of conductive substance and improve durability by forming a pot-shaped hole in the position corresponding to input/output terminals of a circuit board or a connection board, and charging conductive substance into the hole, and inserting the input/output terminals. CONSTITUTION: An electrode 21 is formed on a circuit board 20, and photosensitive high polymer material 24 is applied thereon, and with place of the electrode 21 as a mask, it is exposed to light and is developed. Then, it is etched to form a pot-shaped hole 25 on the electrode 21. Next, conductive substance 23 using liquid metal is charged into the hole 25, and the electrode 11 made on the circuit board 10 is inserted. By this constitution, because the inlet of the hole 25 is narrow, the reduction of the conductive substance is prevented for a long period, and the low resistance can be preserved. |
