Abstract:
Disclosed are relate to an apparatus for supplying a cleaning liquid to a substrate. The cleaning liquid supply unit includes a mixing container having a liquid mixing space in the interior thereof, a first supply member configured to supply a first liquid into the liquid mixing space, a second supply member configured to supply a second liquid that is different from the first liquid into the liquid mixing space, and a mixing member configured to mix the first liquid and the second liquid supplied into the liquid mixing space, and the mixing member may include a circulation line, through which the liquids in the liquid mixing space circulate, and a pressure adjusting member configured to provide a pressure to the liquids such that the liquids in the liquid mixing space flows into the circulation line and adjust the pressure.
Abstract:
Disclosed are an apparatus and a method for manufacturing a cleaning solution. The method includes mixing a surfactant chemical and pure water at a first temperature, and after the mixing of the surfactant chemical and the pure water at the first temperature, mixing the surfactant chemical and the pure water while cooling the surfactant chemical and the pure water to a second temperature that is lower than the first temperature.
Abstract:
Disclosed is a method of regenerating a phosphoric acid solution from a treatment liquid including silicon (Si), hydrogen fluoride (HF), and phosphoric acid, the method including removing the silicon by supplying hydrogen fluoride corresponding to a preset amount or more to the treatment liquid, removing the hydrogen fluoride by heating the treatment liquid to a boiling point of hydrogen fluoride or higher, and adjusting a temperature and a concentration of the phosphoric acid to preset values.