| 摘要 |
The present invention relates to an improved contact surface of pin hole (e.g, a ground pin hole, screw fastening hole, or the like), which is adopted on a substrate, the substrate is formed with at least a pin hole (e.g, a ground pin hole, screw fastening hole, or the like) hole and characterized in that: the periphery of the pin hole (e.g, a ground pin hole, screw fastening hole, or the like) is formed with plural soldering joints and plural penetrated holes, thereby allowing a pin (e.g., pin, ground pin, screw, or the like) and the substrate to be formed with an excellent contact surface for achieving a grounding effect. |
