Patent ID: 7993509

Claim:
A method for manufacturing a double-sided wiring glass substrate having electric wirings formed on the front and rear surfaces of a glass substrate, and a through-hole filled with a metal and penetrating the glass substrate, the respective electric wirings formed on the front and rear surfaces of the glass substrate being made electrically connective through the metal filling the through-hole, the method comprising: forming the through-hole in the glass substrate and forming a preliminary adhesion-reinforcing layer on the front and rear surfaces of the glass substrate, depositing, by an electroless plating method, a first metal on a sidewall part of the through-hole while allowing a void part penetrating the glass substrate to remain in a central part of the through-hole and on the preliminary adhesion-reinforcing layers, sealing, by an electrolytic plating method, at a first current density, with a second metal an opening part of the void part in the rear surface of the glass substrate, removing the preliminary adhesion-reinforcing layer and the first metal from the front surface of the glass substrate, depositing, by said electrolytic plating method, at a second current density which is lower than the first current density, the second metal in the void part inside from the one sealed opening part to the other opening part to thereby fill the through-hole inside with the second metal, and removing the preliminary adhesion-reinforcing layer and the first metal and the second metal from the rear surface of the glass substrate.