Patent ID: 8409952
Filing Date: 2013-04-02
Classification: H01L

Abstract:
1. A method of forming an electronic device comprising: forming a first trench in a workpiece including a substrate, the first trench having side walls and a bottom surface extending for a width between the side walls; forming a charge-storage layer along the side walls and bottom surface of the first trench; forming spacers along the side walls of the first trench overlying the charge-storage layer; subsequent to forming the spacers, implanting ions within the substrate underlying the bottom surface of the first trench to form an implant region; etching, after forming the spacers, at least a portion of the charge-storage layer; removing the spacers after etching; and annealing the implant region, wherein after annealing, the implant region extends the width of the bottom surface and along a portion of the side walls.