Etching a substrate: processes – Gas phase etching of substrate – Application of energy to the gaseous etchant or to the...
Patent
1997-07-14
1999-01-12
Powell, William
Etching a substrate: processes
Gas phase etching of substrate
Application of energy to the gaseous etchant or to the...
156345, 216 69, 216 70, 438728, B44C 122
Patent
active
058582592
ABSTRACT:
A plasma processing apparatus and method is equipped with a vacuum chamber, helmholtz coils, a microwave generator and gas feeding systems. An auxiliary magnet is further provided in order to strengthen the magnetic field in the vacuum chamber to produce centrifugal drifting force which confine the plasma gas about the center position of the vacuum chamber.
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Hirose Naoki
Inujima Takashi
Takayama Toru
Ferguson Jr. Gerald J.
Powell William
Semiconductor Energy Laboratory Co,. Ltd.
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