Patent ID: 8981234
Filing Date: 2015-03-17
Classification: H05K,Y10T

Abstract:
1. A wiring board, comprising: a nitrided insulating layer that is entirely formed on an electrically insulating layer, a copper nitride that is partially formed on the nitrided insulating layer, and a copper film formed on the copper nitride, wherein the copper nitride and the copper film constitute a wiring pattern, and a lamination of the copper nitride and the nitrided insulating layer is provided between the electrically insulating layer and the copper film, wherein the copper nitride alone has a resistivity of 10 μΩcm or less, wherein a first peel strength of the lamination of the copper nitride and the nitrided insulating layer is higher than a sum of a second peel strength and a third peel strength, the second peel strength corresponding to a lamination of the copper film and the nitrided insulating layer while the third peel strength corresponding to a lamination of the copper nitride and a non-nitrided insulating layer, wherein the first peel strength is 0.92 kN/m, the second peel strength is 0.53 kN/m and the third peel strength is 0.12 kN/m.