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Photo by Julien Dorsaz, EPFL - CMi

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Bulk and Sleeve Electron Beam Lithography for Silicon Nitride Photonic Crystals

This is a method to improve the quality of lithography - in particular electron beam lithography (EBL). During an EBL exposure the electrons undergo different scattering processes. One scattering process that plays an important role is the back scattering of the electrons from the substrate or different stacks of thin film present in the exposure stack. As a result the actual dose that the resist sees is quite different that the original exposure dose. This ...