Patent ID: 7172683

Claim:
A method of managing a plating liquid used in a plating apparatus, said method comprising: sampling the plating liquid; analyzing components of the sampled plating liquid using an automatic analyzing device; and based on results of said analyzing, replenishing the plating liquid with component replenishing liquids containing the components of the plating liquid, a total amount of the component replenishing liquids to be supplied to the plating liquid is substantially equal to a reduction of an amount of the plating liquid caused by plating substrates in the plating apparatus, said replenishing comprising replenishing the plating liquid with component replenishing liquids each including: a standard liquid; and a plurality of solutions each including: a basic liquid including copper sulfate and sulfuric acid; and one of a plurality of different types of additives; wherein the standard liquid includes the basic liquid, the plurality of different types of additives, and hydrochloric acid; wherein said replenishing is performed in a manner so as to maintain concentrations of the components of the plating liquid within a certain management range.