| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing printed wiring board by which the thickness of lines can be reduced and the accuracy of a wiring pattern can be improved by preventing an etching margin from becoming thick as plating is performed plural times, in a built-up printed wiring board in which components can be mounted on via holes and stacked via holes can also be formed. SOLUTION: Since interlayer connection is obtained through bumps formed by etching copper foil, the plating performed in the conventional method for conducting via holes becomes unnecessary and the etching margin becomes thin. Consequently, the method of manufacturing printed wiring board can be provided by which the thickness of lines can be reduced and the accuracy of the wiring pattern can be improved. COPYRIGHT: (C)2004,JPO
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