Patent ID: 6242307
Filing Date: 2001-06-05
Classification: H01L

Abstract:
A method for fabricating a flash memory, the method comprising:providing a substrate;forming a first oxide layer and a first conductive layer on the substrate, wherein the first oxide layer and the first conductive layer are in a strip shape and extends along a first direction;forming a mask layer to cover one sidewall of the first conductive layer and the substrate next to the sidewall;performing oxidation, so that a second oxide layer is formed on the exposed substrate and the exposed conductive layer;stripping the mask layer and removing all of the second oxide layer not covered by the floating gate;forming a dielectric layer and a second conductive layer on the first conductive layer and the substrate; andpatterning the second conductive layer, the dielectric layer and the first conductive layer, wherein the patterned second conductive layer and the patterned dielectric layer are bar-shaped and extends along a second direction perpendicular to the first direction.