Patent ID: 8652902
Filing Date: 2014-02-18
Classification: H01L

Abstract:
1. A method comprising: providing a semiconductor-on-insulator substrate comprising: forming at least two trenches in the semiconductor-on-insulator substrate, wherein the at least two trenches extend through the top layer and the dielectric layer and extend partially through the base layer; as a result of forming the at least two trenches, forming at least one elevated structure comprising: forming isolation regions at a bottom of the at least two trenches, wherein forming the isolation regions comprises partially filling the at least two trenches; thermally oxidizing exposed sidewall surfaces of at least the top portion, thereby providing a gate dielectric layer on at least the exposed sidewall surfaces; and forming a conductive layer over the at least one elevated structure, the gate dielectric layer, and the isolation regions to form at least one floating gate semiconductor memory device.