窒素雰囲気でのコロナ放電イオナイザーによる除電

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  • Neutralization by a Corona Discharge Ionizer in Nitrogen Atmosphere
  • チッソ フンイキ デノ コロナ ホウデン イオナイザー ニ ヨル ジョデン

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An electrostatic neutralization of multilayer-loading silicon wafers is demonstrated using a corona discharge ionizer in nitrogen atmosphere, where ac and dc voltages are applied to two needle electrodes for generation of the negative- and positive-charged particles, respectively. We observe a surface potential of the silicon wafer decreases from ±1kV to ±20V within three seconds. Moreover, the density profiles of the charged particles generated by the electrodes are experimentally and theoretically investigated in nitrogen and air atmospheres. Our results show the possibility that the negative-charged particles contributing to the electrostatic neutralization are electrons and negative ions in nitrogen and air atmospheres, respectively.

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