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US09391085B2 Self-aligned split gate flash memory having liner-separated spacers above the memory gate 有权
自对准分离栅极闪存,其在存储器栅极上方具有衬垫分离的间隔物

Self-aligned split gate flash memory having liner-separated spacers above the memory gate
Abstract:
Some embodiments of the present disclosure relate to a split gate memory cell which includes a select gate and a memory gate. The select gate has a planar upper surface disposed over a semiconductor substrate and is separated from the substrate by a gate dielectric layer. The memory gate has a planar upper surface arranged at one side of the select gate and is separated from the substrate by a charge trapping layer. The charge trapping layer extends under the memory gate. A first spacer is disposed above the memory gate and is separated from the memory gate by a first dielectric liner. The first dielectric liner extends upwardly along an upper sidewall of the charge trapping layer; and source/drain regions are disposed in the semiconductor substrate at opposite sides of the select gate and the memory gate.
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