Patent ID: 9611563
Date: 2017-04-04
CPC Classifications: C25D,G01M

Claim:
1. A method of plating a substrate while holding the substrate by a substrate holder having a first holding member and a second holding member which has an opening, said method comprising: holding the substrate with the substrate holder by supporting one surface of the substrate with the first holding member while placing the second holding member in contact with other surface of the substrate, with the other surface of the substrate exposed through the opening of the second holding member; sealing a gap between the first holding member and the second holding member by a first protruding portion of the second holding member while sealing a peripheral portion of the substrate by a second protruding portion of the second holding member when the substrate is held by the substrate holder, thereby forming an internal space in the substrate holder by the first holding member, the second holding member, and the substrate; covering with a seal case the other surface of the substrate exposed through the opening; sealing a gap between the first holding member and the seal case to form a hermetic space between the substrate holder and the seal case; and performing a leakage test by supplying a tracer gas into the hermetic space while evacuating air from the internal space and checking whether the air evacuated from the internal space contains the tracer gas.