Patent ID: 8419924
Filing Date: 2013-04-16
Classification: C25D,H05K

Abstract:
1. A method for manufacturing a wiring substrate, comprising: forming a resist for anodic oxidation on the first surface of a metal plate having a first surface and a second surface on an opposite side of the first surface of the metal plate; forming a protective film on the second surface of the metal plate; immersing the metal plate in an anodic oxidation bath; oxidizing the metal plate serving as an anode in the anodic oxidation bath such that a portion of the metal plate exposed from the resist is oxidized from the first surface toward the second surface and the metal plate retains a metal layer forming the second surface of the metal plate; removing the resist for anodic oxidation from the first surface of the metal plate; and removing the protective film from the metal layer formed on the second surface of the metal plate.