H. Watanabe et al., REPAIR TECHNIQUE FOR PHASE-SHIFTING MASKS USING SILICON-CONTAINING RESIST, I.E.E.E. transactions on electron devices, 40(12), 1993, pp. 2211-2215
A novel repair technique for shifter defects on phase shifting masks i
s described. It is based on the spin-coating of silicon-containing res
ist on the entire mask, electron beam exposure, and development. The n
ewly developed repair technique is quite simple because it does not re
quire the deposition or removal of shifter materials. Both intrusion a
nd extrusion shifter defects have been successfully repaired.