Patent ID: 6048767
Filing Date: 2000-04-11
Classification: H01L

Abstract:
A method of forming a buried bit-line in a memory cell comprising the steps of:forming a groove in a semiconductor substrate;forming a channel stopper layer on a bottom surface of said groove;forming an insulation film on at least opposing side walls of said groove;forming a conductive film on at least said insulation film in said groove;subjecting said conductive film to anisotropic etching so that said conductive film remains only at said opposite side walls of said groove thus forming conductive films remaining on said opposite side walls of said groove; andfilling said groove with an insulation material thereby isolating said conductive films remaining on said opposite side walls of said groove,wherein said conductive films remaining on said opposite side walls of said groove serve as a bit-line and a noise shielding line, respectively.