| 摘要 |
PURPOSE:To provide a printed wiring board which is safe in public health, excellent in wire bonding characteristics, and cheap. CONSTITUTION:The outermost surface of a mounting terminal part 721 of a conductor circuit 72 of a printed wiring board is coated with a palladium plating film 1. The palladium plating film 1 is formed through an electroless plating method, where cyanogen compound is not contained in plating liquid. A palladium plating film 1 is comparatively cheaper than a gold plating film and formed without causing an adverse effect to public health. |
