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    • 1. 发明授权
    • Large area atmospheric-pressure plasma jet
    • 大面积大气压等离子体射流
    • US06262523B1
    • 2001-07-17
    • US09295942
    • 1999-04-21
    • Gary S. SelwynIvars HeninsSteve E. BabayanRobert F. Hicks
    • Gary S. SelwynIvars HeninsSteve E. BabayanRobert F. Hicks
    • H01J724
    • H01J37/32009H01J37/32082H05H1/46H05H2001/466H05H2245/121
    • Large area atmospheric-pressure plasma jet. A plasma discharge that can be operated at atmospheric pressure and near room temperature using 13.56 MHz rf power is described. Unlike plasma torches, the discharge produces a gas-phase effluent no hotter than 250° C. at an applied power of about 300 W, and shows distinct non-thermal characteristics. In the simplest design, two planar, parallel electrodes are employed to generate a plasma in the volume therebetween. A “jet” of long-lived metastable and reactive species that are capable of rapidly cleaning or etching metals and other materials is generated which extends up to 8 in. beyond the open end of the electrodes. Films and coatings may also be removed by these species. Arcing is prevented in the apparatus by using gas mixtures containing He, which limits ionization, by using high flow velocities, and by properly spacing the rf-powered electrode. Because of the atmospheric pressure operation, there is a negligible density of ions surviving for a sufficiently long distance beyond the active plasma discharge to bombard a workpiece, unlike the situation for low-pressure plasma sources and conventional plasma processing methods.
    • 大面积大气压等离子体射流。 描述了可以在大气压和接近室温下使用13.56MHz rf功率工作的等离子体放电。 与等离子体炬不同,放电产生的气相流出物不高于250℃,施加的功率为约300W,并且显示出明显的非热特性。 在最简单的设计中,使用两个平面的平行电极来产生它们之间的体积中的等离子体。 产生能够快速清洗或蚀刻金属和其他材料的长寿命亚稳态和反应性物质的“射流”,其延伸超过电极开口端的8英寸。 这些物质也可以除去膜和涂层。 通过使用含有He的气体混合物,通过使用高流速限制电离,并通过适当地间隔rf供电的电极,在装置中防止了电弧。 由于大气压力操作,与低压等离子体源和常规等离子体处理方法的情况不同,存在离子的密度可忽略不计,超过有效等离子体放电足够长的距离以轰击工件。