Patent ID: 8002959
Filing Date: 2011-08-23
Classification: H05K

Abstract:
1. 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 the steps of: a first step of forming the through-hole in the glass substrate; a second step of forming an electrode layer having an opening part in an area corresponding to the through-hole on one surface of the glass substrate, and by an electrolytic plating method, sealing the opening part of the electrode layer with the metal at a first current density, and further by the electrolytic plating method, depositing the metal from the sealed opening part to an opening part of the through-hole of another surface of the glass substrate at a second current density lower than the first current density to fill the through-hole inside with the metal; a third step of removing the electrode layer and the metal projecting from the through-hole on said another surface of the glass substrate from the glass substrate; a fourth step of forming an adhesion-reinforcing layer on each of the front and rear surfaces of the glass substrate; and a fifth step of forming the electric wirings on the adhesion-reinforcing layer formed on each of the front and rear surfaces of the glass substrate, the electric wirings being electrically connective through the metal filling the through-hole.