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High-refractive index nanoparticle fluids for 193-nm immersion lithography

机译:用于193 nm浸没式光刻的高折射率纳米粒子流体

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A critical issue preventing the implementation of 193nm immersion lithography (193i) to the 32nm node is the availability of high refractive index (n > 1.8) and low optical absorption fluids. To overcome these issues, we have synthesized high refractive index nanoparticles and introduced them into the immersion fluid to increase the refractive index. Hydrolysis and sol-gel methods have been implemented to grow high refractive index nanoparticles with diameters of 3-4nm. Depending on the synthetic route, it is possible to produce stable suspensions of nanoparticles in either aqueous or organic solvents, making it possible to synthesize a stable high-index immersion fluid.
机译:阻止对32nm节点实施193nm浸没式光刻(193i)的关键问题是高折射率(n> 1.8)和低光吸收液的可用性。为了克服这些问题,我们合成了高折射率的纳米粒子,并将其引入浸液中以增加折射率。已实施水解和溶胶-凝胶法以生长直径为3-4nm的高折射率纳米粒子。取决于合成途径,有可能在水或有机溶剂中产生稳定的纳米颗粒悬浮液,从而有可能合成稳定的高折射率浸没流体。

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