Plating apparatus and plating method
Provided are a plating apparatus and the like capable of improving the uniformity of a plating film formed on a substrate. The plating apparatus includes a plating tank, a substrate holder for holding a substrate, an anode holder disposed in the plating tank to face the substrate held in the substrate holder, the anode holder being configured to hold a soluble anode, an anode mask attached to the anode holder, the anode mask having an opening through which a current flowing between the anode and the substrate passes, an adjustment mechanism configured to adjust an opening dimension of the anode mask, and a controller that controls the adjustment mechanism based on an amount of electrolysis in the anode while the anode is in use.
1 . A plating apparatus comprising:
a plating tank;
a substrate holder for holding a substrate;
an anode holder disposed in the plating tank to face the substrate held in the substrate holder, the anode holder being configured to hold a soluble anode;
an anode mask attached to the anode holder, the anode mask having an opening through which a current flowing between the anode and the substrate passes;
an adjustment mechanism configured to adjust an opening dimension of the anode mask; and
a controller that controls the adjustment mechanism based on an amount of electrolysis in the anode while the anode is in use.
2 . The plating apparatus according to claim 1 , wherein the controller sets the opening dimension by applying the amount of electrolysis to a predetermined relationship between the amount of electrolysis in the anode while the anode is in use and the opening dimension of the anode mask to control the adjustment mechanism.
3 . The plating apparatus according to claim 1 , wherein the controller controls the adjustment mechanism to decrease the opening dimension of the anode mask as the amount of electrolysis in the anode while the anode is in use increases.
4 . The plating apparatus according to claim 1 , further comprising:
a regulation plate provided between the anode mask and the substrate holder, the regulation plate having an opening through which a current flowing between the anode and the substrate passes, wherein
the adjustment mechanism is configured to adjust the opening dimension of the anode mask and an opening dimension of the regulation plate, and
the controller controls the adjustment mechanism based on the amount of electrolysis in the anode while the anode is in use.
5 . The plating apparatus according to claim 1 , wherein the substrate holder is configured to hold the substrate in a state where a surface to be plated is oriented downward in the plating tank.
6 . The plating apparatus according to claim 1 , wherein the substrate holder is configured to hold the substrate in a state where a surface to be plated is oriented to a side in the plating tank.
7 . A plating method in a plating apparatus,
the plating apparatus comprising:
a plating tank;
a substrate holder for holding a substrate;
an anode holder disposed in the plating tank to face the substrate held in the substrate holder, the anode holder being configured to hold a soluble anode; and
an anode mask attached to the anode holder, the anode mask having an opening through which a current flowing between the anode and the substrate passes,
the plating method comprising:
calculating an amount of electrolysis in the anode while the anode is in use; and
adjusting an opening dimension of the anode mask based on the calculated amount of electrolysis.