| 摘要 |
PROBLEM TO BE SOLVED: To provide a printed circuit board which restrains the separation of a land without deteriorating a soldering strength even when a no-lead solder is used as a connecting solder. SOLUTION: On the printed circuit board, a square land 3 is formed on the printed circuit board and solder resists 4A, 4B are formed on the surface of the same. The board is constituted so that the corners of the square land 3 are coated by the solder resists 4A, 4B. COPYRIGHT: (C)2004,JPO
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