Patent ID: 6517999
Filing Date: 2003-02-11
Classification: G03F,H01L

Abstract:
A method of removing a photoresist film from a surface of a substrate, comprising:in a sealed system, placing a substrate having a surface covered with a photoresist film in contact with a liquid photoresist film removing solution containing a concentration of ozone, supplying ozone to a region near a surface of the liquid photoresist film removing solution, and cycling, at least twice, relative positions of the surface of the substrate and the surface of the liquid photoresist film removing solution between a first position, Hmax, where a bottom edge of the substrate is above the surface of the liquid photoresist removing solution, a second position, Hmin, where a top edge of the substrate is below the surface of the liquid photoresist film removing solution, and back to the first position, Hmax, to remove the photoresist film so that ozone in a gas phase proximate and above the surface of the liquid photoresist film removing solution, in a concentration higher than the concentration of ozone in the liquid photoresist film removing solution, contacts the photoresist film proximate and above the surface of the liquid photoresist film removing solution, whereby rate of removal of the photoresist film is increased.