| 摘要 |
An exemplary method for making a memory structure comprises forming a first hard mask layer, forming at least one mask layer above the first hard mask layer, patterning the at least one mask layer, etching the at least one mask layer to form an opening having a first lateral width, and a second lateral width different than the first lateral width, forming a second hard mask layer having substantially the first and second lateral widths in the opening, and etching the first hard mask layer using at least one of the lateral widths of the second hard mask layer.
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