Patent ID: 9027573
Filing Date: 2015-05-12
Classification: H01L

Abstract:
1. A substrate processing apparatus comprising: a process tank including a pair of opposed sidewalls, the process tank being configured to store a chemical liquid therein and to process a plurality of substrates by the chemical liquid; a substrate holding mechanism including a holding part configured to hold the plurality of substrates vertically, and a back part connected to the holding part, the back part being interposed between the substrates held by the holding part and one sidewall of the pair of opposed sidewalls of the process tank when the substrate holding mechanism is loaded into the process tank, the substrate holding mechanism being configured to immerse the substrates held by the holding part into the chemical liquid; and a heating device disposed on the process tank, the heating device being configured to heat the stored chemical liquid; wherein the heating device includes a first heating device disposed on the one sidewall of the process tank, and a second heating device disposed on the other sidewall thereof, a control unit is connected to the first heating device and the second heating device, the control unit is configured to independently control an energy output of the first heating device and an energy output of the second heating device, the control unit is configured to control the first heating device and the second heating device by varying values of currents provided to the first heating device and the second heating device such that the energy output of the first heating device is larger than the energy output of the second heating device, so as to heat the chemical liquid stored in the process tank, and when the substrate holding mechanism is loaded into the process tank, the back part is interposed between the substrates held by the holding part and the first heating device.