Patent ID: 6200633
Filing Date: 2001-03-13
Classification: G03F,G05D,H01L,Y10T

Abstract:
A spin-coating method, comprising the steps of:(a) holding a substrate to be processed such that the surface to be processed of the substrate is kept substantially horizontal;(b) adding a solvent to an initial process solution which already contains a solvent and stirring the resultant mixture so as to prepare a primary mixed liquid material having a process solution concentration lower than that of the initial process solution;(c) adding an additional solvent to said primary mixed liquid material immediately before supply of the solution to the substrate so as to prepare a final mixed liquid material having a process solution concentration lower than that of the primary mixed liquid material;(d) supplying first said final mixed liquid material to a surface to be processed of the substrate; and, then,(e) supplying the primary mixed liquid material to the surface to be processed of the substrate,wherein said substrate is rotated about an axis perpendicular to a surface to be processed of said substrate in each of said steps (d) and (e).