| 摘要 |
PROBLEM TO BE SOLVED: To provide a reliable printed wiring board and a manufacturing method therefor, capable of wiring in high density even near a land with a teardrop. SOLUTION: Left and right teardrops 40A and 40B are formed to a land 32 which can assure sufficient insulation interval from a line. Meanwhile, to a land 30 close to lines 24 and 26, a teardrop 40B of side angle 30°is fitted on the left side in the figure while a teardrop 44A of side angle 50°is fitted on the right side. By fitting a small, or large side angle, teardrop 44A on the right side of the land 30, two lines 24 and 26 can be disposed between the land 30 and the land 32. COPYRIGHT: (C)2003,JPO
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