Patent ID: 7226840
Filing Date: 2007-06-05
Classification: B82Y,G11C,H01L,Y10S

Abstract:
1. A process for forming an electronic device, the process comprising: forming a first set of discontinuous storage elements over a primary surface of a substrate; forming a first trench within the substrate, wherein the first trench includes a wall and a bottom and extends from the primary surface of the substrate; forming a second set of discontinuous storage elements, wherein a first portion of the second set of discontinuous storage elements lie within the first trench; forming a first gate electrode within the first trench after forming the second set of discontinuous storage elements, wherein: removing a part of the first portion of the second set of discontinuous storage elements that overlies the primary surface of the substrate; forming a second gate electrode that overlies the first gate electrode and the primary surface of the substrate, wherein after forming the second gate electrode, substantially none of the first portion of the second set of discontinuous storage elements lies along the wall of the first trench at an elevation between an upper surface of the first gate electrode and the primary surface of the substrate.