PLASMA TREATER
PURPOSE:To fix semiconductor wafers without fail by stable electrostatic adsorption without unfavorably affecting the semiconductor wafers and devices. CONSTITUTION:Within the title plasma treater, a dielectric 3a is formed on the surface of a lower electrode 3 so as to mount a semiconductor wafer 9...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To fix semiconductor wafers without fail by stable electrostatic adsorption without unfavorably affecting the semiconductor wafers and devices. CONSTITUTION:Within the title plasma treater, a dielectric 3a is formed on the surface of a lower electrode 3 so as to mount a semiconductor wafer 9 as a workpiece on this dielectric body 3a, the lower electrode 3 is impressed with a positive voltage using a DC power supply 5 for electrostatic adsorption to make the voltage negative by plasma treatment while electrically insulated from the lower electrode 3 by the dielectric 3a so that the voltage difference from the semiconductor wafer 9 not decreasing the negative voltage may be increased to augment the electrostatic adsorption. |
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