| 摘要 |
There is provided a method of manufacturing a circuit board having a first fixed contact and a second fixed contact that extend substantially orthogonal to each other on the same surface, the life span required for the first fixed contact being longer than that required for the second fixed contact. The method includes: etching a copper foil formed on the entire surface of an insulating substrate to form the patterns of the first and second fixed contacts; polishing the surface of the insulating substrate with buff to remove an oxide film adhered to the copper foil; and sequentially forming a nickel layer having a thickness of about 1 to about 5 mum and a gold layer having a thickness of about 0.01 to about 0.5 mum on each of the first and second fixed contacts. In the method, the buffing direction is substantially aligned with a direction in which a first movable contact slides on the first fixed contact.
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