Patent ID: 6759351
Filing Date: 2004-07-06
Classification: G03F,H01L,Y10S

Abstract:
A method for eliminating polymer blobs in a photoresist mask formed at the surface of a semiconductor wafer, comprising the steps of:providing a semiconductor wafer having a photoresist layer formed thereon; exposing, baking and developing the photoresist layer to produce a patterned photoresist mask; and heating the wafer for a time sufficient to reach a temperature in a 100-400Â° C. range and without cooling it, and then rinsing the wafer with deionized water at a temperature equal to or higher than the room temperature; wherein the semiconductor wafer comprises silicon, said step of heating the silicon wafer includes a step of post-development bake performed after said development step, the silicon wafer is immediately rinsed after said bake step, and the bake temperature is about 140Â° C.