Patent ID: 7323212
Filing Date: 2008-01-29
Classification: G03F,H01L

Abstract:
1. In the fabrication of semiconductor integrated circuits, a method for generating a dummy dispense signal, comprising: (a) recording a time at which a substrate is processed; (b) recording a time at which a volatile solution is dispensed, wherein the time at which the volatile solution is dispensed comprises a last time at which the volatile solution is dispensed; (c) generating a time difference between a move-in time of the substrate and the last time at which the volatile solution is dispensed; (d) generating a dummy dispense signal when required, (e) recording a recipe for dispensing the volatile solution and a name of the volatile solution, (f) performing a dummy dispense when the time difference is larger than, or equal to, a period of time that is long enough to substantially make a solvent of the volatile solution evaporate; and (g) determining whether the name of the volatile solution responds to the recipe, wherein the volatile solution is photoresist.