MANUFACTURING METHOD OF BORED LAMINATE, BORED LAMINATE, MANUFACTURING METHOD OF MULTILAYER SUBSTRATE, COMPOSITION FOR FORMING GROUND LAYER

摘要

PROBLEM TO BE SOLVED: To provide a manufacturing method of a bored laminate in which the form accuracy of holes formed by laser processing is excellent, and adhesion of a metal layer to be laminated is also excellent, and to provide a bored laminate obtained by the manufacturing method.SOLUTION: The manufacturing method of a bored laminate includes a boring step for forming a hole that reaches the surface of a first metal layer from the surface of a laminate to be processed on the plating layer side, by performing laser processing on the laminate to be processed including the first metal layer, a ground layer containing a polymer having a repeating unit having a cyano group and metal oxide particles, and a plating layer in this order on a substrate. The content of the repeating unit having a cyano group in the polymer is 10-60 mol% for all repeating units in the polymer, the grain size of the metal oxide particles is 50-2000 nm, and the content of the metal oxide particles in the ground layer is 20-60 mass%.