Patent ID: 7758341

Claim:
A utility apparatus of a substrate processing apparatus that supplies a liquid to the substrate processing apparatus having a plurality of blocks of heat treatment apparatus groups, each comprised of heat treatment chambers, each of which treats a processing target substrate at a predetermined temperature and which are stacked in a vertical direction as a vertical block, or which are disposed in a horizontal direction as a horizontal block, comprising: a plurality of supply ports that supplies the liquid for each vertical block, each horizontal block, each predetermined plurality of heat treatment apparatuses in the vertical block, or each predetermined plurality of heat treatment apparatuses in the horizontal block; a plurality of recovery ports that collects the liquid supplied for the each vertical block, the each horizontal block, the each predetermined plurality of heat treatment apparatuses in the vertical block, or the each predetermined plurality of heat treatment apparatuses in the horizontal block; detecting mechanisms which are provided respectively in the plurality of recovery ports for detecting a temperature of recovered liquid; a control mechanism for that controls based on detection information of the detecting mechanisms; and a switching mechanism for switching the plurality of supply ports collectively to another supply line when the control mechanism determines that the temperature is outside a preset range.