| 摘要 |
PROBLEM TO BE SOLVED: To provide a large current printed wiring board whose contact resistance is small and work efficiency is good. SOLUTION: A first copper board 11, a second copper board 12, an insulating layer 13 surrounding the first copper board 11 and the second copper board 12, a first through hole 14 passing through the first copper board 11 and the insulating layer 13 positioned above and below the first copper board 11, a first conductor layer 14a which is formed on the inner face of the first through hole 14 and is electrically connected to the first copper board 11, a second through hole 15 passing through the second copper board 12 and the insulating layer 13 positioned above and below the second copper board 12, and a second conductor layer 15a which is formed on the inner face of the second through hole 15 and is electrically connected to the second cooper board 12, are installed.
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