Patent ID: 6063707
Filing Date: 2000-05-16
Classification: H01L

Abstract:
A method of selectively forming a feature of a material on a substrate, where the material is capable of being both sputtered and resputtered, comprising:forming a underlayer film of a lower atomic weight over the substrate, said lower atomic weight being one which will allow sputtering of a material without significant resputtering, the material otherwise capable of both sputtering and resputtering;depositing a dielectric layer over at least a portion of said low atomic weight film;depositing an overlayer over said dielectric layer, said overlayer being of a higher atomic weight material having a weight that will enhance resputtering for the material, said overlayer being deposited only in areas where accumulation of said material is not desired;using a physical deposition process to deposit a material onto said areas of said lower atomic weight underlayer and onto said higher atomic weight overlayer, said physical deposition process accumulating the material on said lower atomic weight underlayer, and forming a thinner layer of the material over said higher atomic weight overlayer; andremoving at least the thinner layer formed over said overlayer film.