Patent ID: 6737202
Filing Date: 2004-05-18
Classification: H01L,Y10S

Abstract:
A method of forming a tiered structure using a multi-layered resist stack comprising the steps of:providing a substrate having a surface; depositing and patterning a base resist layer on the surface of the substrate; stabilizing the patterned base resist layer, thereby forming a stabilized resist layer; forming a resist stack including an isotropically developing material formed on an uppermost surface of the stabilized resist layer and an imageable material formed on a surface of the isotropically developing material; patterning, in alignment with an opening defined in the stabilized resist layer, an opening in the resist stack having a reentrant profile and a dimension greater than the opening defined in the stabilized resist layer; depositing a metal material within the opening defined therein the resist stack and the opening defined therein the stabilized resist layer; and removing the resist stack and the stabilized resist layer, thereby exposing a tiered structure.