Patent ID: 7407857
Filing Date: 2008-08-05
Classification: G11C,H01L

Abstract:
1. A method of making a memory device on a semiconductor substrate of a first conductivity type, comprising: forming spaced-apart first and second regions in the substrate that have a second conductivity type different from the first conductivity type, wherein a channel region is defined in the substrate between the first and second regions; forming a conductive select gate over and insulated from a first portion of the channel region; forming a conductive floating gate having a bottom surface disposed over and insulated from the first region and a second portion of the channel region, wherein the floating gate formation includes forming a notch in the bottom surface at least partially over the channel region second portion and having an edge that is aligned with an edge of the first region or that is disposed over the first region; and forming a conductive control gate having a first portion disposed adjacent to the floating gate.