| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit board in which the conductive loss is low when being mounted on an electric or electronic device for high-frequency current and troubles in the electric or electronic device can be prevented. SOLUTION: A circuit board 1 is formed by laminating a layer 2 made of copper foil and a copper-planted layer 3 on an insulating board 5 made of polytetrafluoroethylene so that a predetermined circuit is formed, and laminating a tin-planted layer 4 on the layers made of copper. |
