“The manufacturing of an optical device substrate is achieved by anodizing the surface of a metal plate, coating an insulative liquid bonding agent, having a viscosity which can permeate into an anodized film of the metal plate, on the metal plate, and alternately layering, pressing, and heat treating the metal plate coated with the liquid bonding agent and an insulative film bonding agent before the liquid bonding agent becomes solid so that bonding force between the metal plate and an insulation layer is strengthened, bubbles formation in the liquid bonding agent is inhibited, the fragile nature of the liquid bonding agent after the solidification is reduced producing an optical device substrate with improved mechanical strength and an insulation layer of precisely controlled thickness.”