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- W1966201431 abstract "An important aspect of single-layer resist use at 193-nm is the inherently poor etch resistance of the polymers currently under evaluation for use. In order to provide the information necessary for resist process selection at 193 nm, we have projected the ultimate etch resistance possible in 193-nm transparent polymers based on a model we have developed. First, a data base of etch rates was assembled for various alicyclic methacrylates. This data base has been used to develop an empirical structure-property relationship for predicting polymer etch rates relative to novolac-based resist. This relationship takes the functional form normalized rate equals -3.80r<SUP>3</SUP> plus 6.71r<SUP>2</SUP> minus 4.42r plus 2.10, where r is the mass fraction of polymer existing as cyclic carbon. From this analysis, it appears as though methacrylate resists equal in etch resistance to deep UV resists will be possible. Early generations of methacrylate-based 193-nm resists were also evaluated in actual IC process steps, and those results are presented with a brief discussion of how new plasma etch chemistries may be able to further enhance resist etch selectivity." @default.
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- W1966201431 date "1996-06-14" @default.
- W1966201431 modified "2023-10-05" @default.
- W1966201431 title "Limits to etch resistance for 193-nm single-layer resists" @default.
- W1966201431 doi "https://doi.org/10.1117/12.241835" @default.
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