We have reduced the critical dimension bias for reticle fabrication.
Pattern transfer to the radiation-blocking layer of the reticle substrate
essentially depends upon use of a hard mask to which the pattern is
transferred from a photoresist. The photoresist pull back which occurs
during pattern transfer to the hard mask is minimalized. In addition, a
hard mask material having anti-reflective properties which are matched to
the reflective characteristics of the radiation-blocking layer enables a
reduction in critical dimension size and an improvement in the pattern
feature integrity in the hard mask itself. An anti-reflective hard mask
layer left on the radiation-blocking layer provides functionality when
the reticle is used in a semiconductor device manufacturing process.