Abstract
In next generation lithography to make sub-15nm pattern, Directed self-assembly (DSA) and Nano-imprint lithography (NIL) are proposed. The current DSA process is complicated and it is difficult to decrease width and line edge roughness of a guide pattern for sub-15nm patterning. In the case of NIL, it is difficult to make the master template having sub- 15nm pattern. This paper describes cost-effective lithography process for making sub-15nm pattern using DSA on a guide pattern replicated by Nano-imprinting (NIL + DSA). Simple process for making sub-15nm pattern is proposed. The quartz templates are made and line/space patterns of half pitch (hp) 12nm and hp9.5nm are obtained by NIL + DSA.
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