Unevenly mixed copolymers

Figure 6. Clearing Dose vs Crosslink Density for Unevenly Mixed Copolymers.

Figure 7. Thickness Remaining vs Mix Ratio for Unevenly Mixed Copolymers.

Other methods of reducing the crosslink density have also led to sensitivity improvements, of which the most promising is the uneven copolymer mixtures with a potential 60-70% reduction in operating dose. However, the solutions must be aged after mixing in order to obtain reproducible performance. This technique also requires work on a developer system. Flood exposure yields a 50% improvement in sensitivity but creates additional processing difficulties due to double exposure effects. 

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