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    • 1. 发明授权
    • UHF/VHF plasma for use in forming integrated circuit structures on
semiconductor wafers
    • UHF / VHF等离子体,用于在半导体晶片上形成集成电路结构
    • US5300460A
    • 1994-04-05
    • US32744
    • 1993-03-16
    • Kenneth S. CollinsCraig A. RoderickChan-Lon YangDavid N. K. WangDan Maydan
    • Kenneth S. CollinsCraig A. RoderickChan-Lon YangDavid N. K. WangDan Maydan
    • C23C16/509H01J37/32H05H1/46H01L21/00H01L21/02H01L21/22H01L21/265
    • H01J37/32174C23C16/509H01J37/32082H05H1/46
    • An improved method of fabricating integrated circuit structures on semiconductor wafers using a plasma-assisted process is disclosed wherein the plasma is generated by a VHF/UHF power source at a frequency ranging from about 50 to about 800 MHz. Low pressure plasma-assisted etching or deposition processes, i.e., processes may be carried out within a pressure range not exceeding about 500 milliTorr; with a ratio of anode to cathode area of from about 2:1 to about 20:1, and an electrode spacing of from about 5 cm. to about 30 cm. High pressure plasma-assisted etching or deposition processes, i.e., processes may be carried out with a pressure ranging from over 500 milliTorr up to 50 Torr or higher; with an anode to cathode electrode spacing of less than about 5 cm. By carrying out plasma-assisted processes using plasma operated within a range of from about 50 to about 800 MHz, the electrode sheath voltages are maintained sufficiently low, so as to avoid damage to structures on the wafer, yet sufficiently high to preferably permit initiation of the processes without the need for supplemental power sources. Operating in this frequency range may also result in reduction or elimination of microloading effects.
    • 公开了使用等离子体辅助方法制造半导体晶片上的集成电路结构的改进方法,其中等离子体由VHF / UHF电源以约50至约800MHz的频率产生。 低压等离子体辅助蚀刻或沉积工艺,即工艺可以在不超过约500毫托的压力范围内进行; 阳极与阴极面积的比例为约2:1至约20:1,电极间距约为5cm。 到约30厘米。 高压等离子体辅助蚀刻或沉积工艺,即工艺可以在500毫乇至50乇以上的压力下进行; 阳极至阴极间距小于约5厘米。 通过使用在约50至约800MHz的范围内操作的等离子体等离子体辅助处理,电极护套电压保持足够低,以避免损坏晶片上的结构,但足够高以优选允许引发 该过程无需补充电源。 在该频率范围内工作也可能导致微载物效应的降低或消除。