Patent ID: 7985649

Claim:
A method of making a semiconductor device on a semiconductor layer, comprising: forming a select gate dielectric layer over the semiconductor layer; forming a select gate layer over the select gate dielectric layer; forming a sidewall of the select gate layer by removing at least a portion of the select gate layer; removing a portion of the select gate dielectric layer underlying the select gate layer to form an undercut under the select gate layer; growing a sacrificial layer on at least a portion of the sidewall of the select gate layer and under at least a portion of the select gate layer; removing the sacrificial layer to result in an exposed surface of the at least portion of the sidewall of the select gate layer and an exposed surface of the semiconductor layer under the select gate layer; forming a control gate dielectric layer over at least a portion of the exposed surface of the semiconductor layer under the select gate layer and at least a portion of the exposed surface of the at least portion of the sidewall of the select gate layer; forming a charge storage layer over the control gate dielectric layer; and forming a control gate layer over the charge storage layer.