Invention Grant
US07659211B2 Method and apparatus for fabricating a memory device with a dielectric etch stop layer 有权
用于制造具有介电蚀刻停止层的存储器件的方法和装置

Method and apparatus for fabricating a memory device with a dielectric etch stop layer
Abstract:
The present technique relates to a method and apparatus to provide a dielectric etch stop layer that prevents shorts for a buried digit layer as an interconnect. In a memory device, such as DRAM or SRAM, various layers are deposited to form structures, such as PMOS gates, NMOS gates, memory cells, P+ active areas, and N+ active areas. These structures are fabricated through the use of multiple masking processes, which may cause shorts when a buried digit layer is deposited if the masking processes are misaligned. Accordingly, a dielectric etch stop layer, such as aluminum oxide Al2O3 or silicon carbide SiC, may be utilized in the array to prevent shorts between the wordlines, active areas, and the buried digit layer when the contacts are misaligned.
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