MANUFACTURING METHOD OF WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a wiring board which achieves high electric insulation reliability.

SOLUTION: A manufacturing method of a printed board comprises the steps of: depositing an insulation layer 3 on a surface of a multiple patterning board; depositing a base metal layer on the entire surface of the insulation layer 3; depositing a plating metal layer on a surface of the base metal layer with an electrolytic plating method so as to have a wiring conductor pattern corresponding to a wiring conductor 4 and a dummy pattern 23b covering an area ranging from the wiring conductor pattern to a cutting region B; removing the base metal layer exposed from the wiring conductor pattern and the dummy pattern 23b; removing the dummy pattern 23b and the base metal layer located under the dummy pattern 23b; and cutting the cutting regions B and dividing wiring board regions A into individual wiring boards.

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