Patent ID: 6216475
Filing Date: 2001-04-17
Classification: G05D,H01L

Abstract:
A cooling method for cooling a substrate to a target temperature by loading said substrate onto a placing table by convey means and selectively supplying a first coolant having a temperature lower than said target temperature and a second coolant having a temperature almost equal to the target temperature into a coolant path arranged in said placing table, comprising the steps of:(A1) supplying said second coolant into said coolant path before loading of the substrate onto the placing table to set the temperature of the placing table at a temperature almost equal to the target temperature;(B1) supplying said first coolant into the coolant path when or a predetermined time after the substrate is loaded onto the placing table to cool the substrate; and(C1) supplying again the second coolant into the coolant path after the placing table is cooled to a temperature lower than the target temperature to warm the substrate to the target temperature.