| 摘要 |
PURPOSE:To set a diameter of a throughhole small, and improve withstand voltage characteristics, etc., without deteriorating electric characteristics of contact pins to high frequency by setting only forward end parts of the contact pins to have a smaller diameter than the other parts. CONSTITUTION:In case of mounting a connector by inserting forward end parts 6C of contact pins 6 into a number of throughholes formed in a printed circuit board 7, the part 6C only is formed to be a smaller diameter part than the other parts. Deterioration of high frequency characteristics due to increase of an electric impedance can thus be restricted to the minimum, and a diameter of the throughhole can be set smaller than that in conventional devices. Since a diameter of a land 8 also becomes smaller, an interval between the land 8 and a wiring pattern can be secured to be a desired interval, so withstand voltage characteristics of a substrate 7 to high frequency signals can be improved, and that crosstalk between the signals can be reduced. |
