Processing of silicon nanostructures by Ga+ resistless lithography and reactive ion etching
Ga+ resistless lithography was applied to fabricate silicon nanostructure arrays. Using a reference RIE process a 1:1 pattern transfer could be realized. An adapted RIE process resulted in structures with smaller dimensions than the mask. This RIE process resulted in small lines and pillars with aspect ratios above 10. Widths or diameters of lines or pillars slightly below 20nm could be realized.
ga+ resistless lithography reactive ion etching rie focused ion beam fib fib patterning