Patent ID: 6340253
Filing Date: 2002-01-22
Classification: G03F,H01L

Abstract:
A resist peeling system for peeling resist residue adhering on a semiconductor wafer by using a resist peeling solution composed of multiple components, said resist peeling system comprising:a peeling solution tank for storing said resist peeling solution; an electric conductivity monitor for monitoring the electric conductivity of said resist peeling solution; a means for estimating the components ratio in said resist peeling solution on the basis of said electric conductivity; and a component adding mechanism for adding, when a component of said resist peeling solution is estimated to be insufficient on the basis of the result estimated by said estimating means, a suitable amount of the component estimated to be insufficient to said resist peeling solution, said component adding mechanism comprises a continuously replenishing mechanism for continuously adding the component estimated to be insufficient to said resist peeling solution and an intermittently replenishing mechanism for intermittently adding a new resist peeling solution or the component estimated to be insufficient, thereby compensating the loss of said resist peeling solution due to carry-out of said resist peeling solution by adhesion thereof on said semiconductor wafer.