Patent ID: 6440638
Filing Date: 2002-08-27
Classification: G03F,H01L

Abstract:
A method for fabricating a photoresist plug having controlled vertical dimensions within a trench, said method comprising the steps of:providing a substrate having at least one trench formed therein; providing a layer of photoresist over said substrate, said photoresist filling said at least one trench; exposing said layer of photoresist to wavelengths of radiation to which said photoresist is sensitive, wherein said photoresist in said at least one trench is exposed to a controlled depth, wherein said radiation is directed at said layer of photoresist at an oblique angle of incidence with respect to a major dimension of said layer of photoresist, and wherein said depth is controlled by said angle of incidence; developing said exposed layer of photoresist; and stripping said exposed layer of photoresist.