Patent ID: 8637397

Claim:
A method of manufacturing a through hole electrode substrate comprising: forming a plurality of through holes passing through the front and back of a wafer-shaped substrate; forming an insulation film on a surface of the substrate and the though hole; forming a seed layer from a metal on at least one side of the substrate and/or the through hole; forming a metal layer having a cap shape on a bottom part of the through hole on a surface on which the seed layer is formed by an electrolytic plating method supplying direct current to the seed layer for a first time period; and filling a metal material into the plurality of through holes by an electrolytic plating method supplying a pulse current to the seed layer and the metal layer; the metal material having an area weighted average crystal grain diameter of 13 μm or more; and at one end of the through holes, having a larger area weighted average crystal grain diameter than the other end.