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    • 8. 发明专利
    • PLASMA PROCESSOR
    • JPH03232224A
    • 1991-10-16
    • JP2931190
    • 1990-02-07
    • MITSUBISHI ELECTRIC CORP
    • NISHIOKA KYUSAKUSHIBANO TERUOFUJIWARA NOBUO
    • C23F4/00H01L21/205H01L21/302
    • PURPOSE:To confine any charge particles contained in discharged plasma in a magnetic field for effectively avoiding the arrival of the charged particles at a wafer thereby enabling the plasma gas in high density to be produced for accelerating the processing rate by installing a local magnetic field impression means between a plasma producer and a processing chamber. CONSTITUTION:Any discharged plasma 3 is confined in a magnetic field generated by a magnetic field impression mechanism 9 installed on the peripheral part of a discharge tube 4. Accordingly, especially the charged particles such as ions, etc., contained in the discharged plasma 3 are effectively confined in the magnetic field so that specified particles such as radicals or neutral particles, etc., may selectively reach a wafer 6 to be processed. In such a constitution, it is recommended that said magnetic field impression mechanism 9 is installed as close as possible to the plasma producer, that is, as high as possible from the discharge tube 4 so that the effect of confining the plasma gas is enhanced thus enabling the plasma gas in high density to be produced.