COPPER FOIL WITH CARRIER, LAMINATE, PRINTED WIRING BOARD AND METHOD FOR PRODUCING PRINTED WIRING BOARD

摘要

PROBLEM TO BE SOLVED: To provide a copper foil with a carrier which satisfactorily suppresses falling of roughened particles in a roughened particle layer provided on a side surface of an ultrathin copper layer and has good peel strength.SOLUTION: There is provided a copper foil with a carrier which comprises a carrier, an intermediate layer, an ultrathin copper layer and a surface treatment layer containing a roughening-treated layer in this order, wherein the number of particles having a diameter more than 1 μm of roughened particles constituting the roughening-treated layer is suppressed to 5 pieces or less in the range of 10 μm square and roughened particles having a diameter of 0.1 μm or more and 1 μm or less are present in a density of 500 pieces or more and 3000 pieces or less in the range of 10 μm square.SELECTED DRAWING: Figure 1