A method for producing a pattern on a substrate includes providing at
least one exposure of the pattern onto a layer of the substrate by a
higher-precision lithography mechanism and providing at least one
exposure of the pattern onto a layer of the substrate by a
lower-precision lithography mechanism. The exposures can be done in
either order, and additional exposures can be included. The
higher-precision lithography mechanism can be immersion lithography and
the lower-precision lithography mechanism can be dry lithography.