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红外波段激光驱动极紫外光刻光源研究进展

Research progress on infrared laser driven extreme ultraviolet lithography source

  • 摘要: 激光驱动等离子体产生13.5 nm的极紫外光源,用于目前最先进的光刻机,而10.6 μm CO2气体激光是商用极紫外光刻机的驱动光源。固体激光由于插头效率高、输出功率/能量可扩展性强等优点,有望在未来成为新一代驱动光源。归纳了产生极紫外光源的激光-等离子体相互作用的物理过程,综述了10.6 μm CO2气体激光器、1 μm和2 μm固体激光3种红外波段激光在驱动等离子体产生极紫外光和光学系统方面的研究进展,讨论了1 μm和2 μm固体激光器作为驱动光源的优越性。在此基础上,对红外波段激光驱动极紫外光刻光源的研究前景进行了展望。

     

    Abstract: A 13.5 nm extreme ultraviolet light source produced by the laser driven plasma is used in today's most advanced lithography machines and chip manufacturing. Generally, a 10.6 μm CO2 gas laser is the driving light of commercial extreme ultraviolet lithography. In the future, solid-state lasers are expected to become a new generation of driving light sources due to their high plug efficiency and strong output power/energy scalability. The physical process of laser-plasma interaction for producing extreme ultraviolet light was summarized. The research progress of 10.6 μm CO2 gas laser 1 μm and 2 μm solid-state lasers in driving plasma to produce extreme ultraviolet light and optical system was reviewed. The advantages of 1 μm and 2 μm solid-state lasers as driving light sources were emphatically discussed. On this basis, the research prospect of infrared laser driven extreme ultraviolet lithography source is prospected.

     

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