Etching a substrate: processes – Gas phase etching of substrate – With measuring – testing – or inspecting
Reexamination Certificate
2005-06-28
2005-06-28
Ahmed, Shamim (Department: 1765)
Etching a substrate: processes
Gas phase etching of substrate
With measuring, testing, or inspecting
C216S060000, C216S067000, C438S014000, C438S016000, C156S345240, C156S345250, C156S345260
Reexamination Certificate
active
06911157
ABSTRACT:
At least one control parameter such as power supplied to a plasma, process pressure, gas flow rate, and radio frequency bias power to a wafer is changed for an extremely short time as compared with an entire plasma processing time, to the extent that such a change does not affect the result of plasma processing on the wafer, to monitor a temporal change of a plasma state which occurs at the time of changing. A signal resulting from the monitoring method is used to control or diagnose the plasma processing, thereby making it possible to accomplish miniature etching works, high quality deposition, surface processing.
REFERENCES:
patent: 4985114 (1991-01-01), Okudaira et al.
patent: 5405488 (1995-04-01), Dimitrelis et al.
patent: WO 99/14699 (1999-03-01), None
Edamura Manabu
Ikenaga Kazuyuki
Yamamoto Hideyuki
Antonelli Terry Stout & Kraus LLP
Hitachi , Ltd.
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