Figure 4. Schematic diagrams of the process sequence for the fabrication of the hybrid mask
mold. (a) Cr alignment marks pattern over Al thin layer on quartz substrate, (b) PMMA and
co-polymer pattern by e-beam lithography, (c) Cr dot array by lift-off, (d) Al dry etch,
(e) quartz dry etch, (f) Cr and Al wet etch, and (g) micron size Cr pattern by lift-off.