Patent ID: 6798002
Filing Date: 2004-09-28
Classification: H01L

Abstract:
A semiconductor memory device, comprising:a. a silicon substrate; b. a periphery memory region delineated on said substrate, said periphery memory region having at least one periphery memory element thereon formed; c. a core memory region also delineated on said substrate, said core memory region comprising at least one set of dual gate core memory structures thereon formed, said dual gate core memory structures at least one pair of core memory stacks, and said core memory stacks comprising: a semiconductor material; and a dielectric material defining respective sidewall portions; d. a sidewall spacer structure comprising an anti-reflective coating material for protecting said core memory stacks during etching operations, said anti-reflective coating material comprising insulator silicon germanium (SiGe); and e. a coating residing on said periphery memory region comprising said anti-reflective coating material, wherein said coating is adapted to protect said periphery memory region during etching operations and to provide a pattern for said at least one periphery memory clement on said periphery memory region.