Chemistry: electrical and wave energy – Apparatus – Coating – forming or etching by sputtering
Patent
1991-02-04
1992-06-16
Weisstuch, Aaron
Chemistry: electrical and wave energy
Apparatus
Coating, forming or etching by sputtering
118723, 156345, 31511141, 20429816, 20429831, 20429834, 20429837, 20429807, 20429833, 42218605, H05H 146, C23C 1434, B01J 1912
Patent
active
051222515
ABSTRACT:
A high density ionized plasma is generated in a source chamber using a single loop disposed in a plane that intercepts the central axis of the source chamber perpendicularly or at a lesser angle and spaced from the closed end of the chamber. With a longitudinal magnetic field and an inert or reactive gas injected into the source chamber, excitation of the antenna with RF energy in the 5 to 30 MHz establishes the M=0 excitation mode or components of both the M=0 and M=1 modes. Low frequency whistler waves are created which generate a uniform and high density plasma and high plasma current. The plasma source thus defined is used in combination with process chamber configurations in which static shaped or time modulated magnetic fields enhance the distribution and uniformity of the plasma at a substrate to be etched, deposited or sputtered.
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patent: 4859908 (1989-08-01), Yoshida et al.
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patent: 4990229 (1991-02-01), Campbell et al.
patent: 5032202 (1991-07-01), Tsai et al.
Campbell Gregor A.
Conn Robert W.
deChambrier Alexis P.
Pearson David C.
Shoji Tatsuo
Plasma & Materials Technologies, Inc.
Weisstuch Aaron
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