| 摘要 |
PROBLEM TO BE SOLVED: To provide a lead-free printed circuit board which can be discriminated easily from a printed circuit board using lead solder, and to provide a method of managing the same. SOLUTION: Color of resist 4 on a printed circuit board 1 using lead-free solder is differentiated from the color of resist 4 of the printed circuit board 1 using lead solder. Color of resist 4 on the printed circuit board 1 using lead-free solder is set other than green. Difference of gray level is set between the color of resist 4 of the printed circuit board 1 using lead-free solder and the color of resist 4 of the printed circuit board 1 using lead solder. COPYRIGHT: (C)2007,JPO&INPIT
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