The fluctuations in etch rates caused by changes in chamber conditions were studied. Excess deposition of C-F polymer on the chamber wall increased CFx density while H was consumed by the polymer and/or was deactivated on the conductive surface of Si electrodes. The change in radical densities had a clear relationship with the SiN etch rate. The etch rate was accurately predicted by statistical analysis using equipment engineering system (EES) data and optical emission spectroscopy (OES) signals which were extracted by considering both the physical model and the results of statistical analysis. (C) 2009 The Japan Society of Applied Physics
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CEA, IRFM, F-13108 St Paul Les Durance, FranceCEA, IRFM, F-13108 St Paul Les Durance, France
Munschy, Yann
Bourne, Emily
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CEA, IRFM, F-13108 St Paul Les Durance, France
Ecole Polytech Fed Lausanne, SCITAS, CH-1015 Lausanne, SwitzerlandCEA, IRFM, F-13108 St Paul Les Durance, France
Bourne, Emily
Dif-Pradalier, Guilhem
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CEA, IRFM, F-13108 St Paul Les Durance, FranceCEA, IRFM, F-13108 St Paul Les Durance, France
Dif-Pradalier, Guilhem
Donnel, Peter
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CEA, IRFM, F-13108 St Paul Les Durance, FranceCEA, IRFM, F-13108 St Paul Les Durance, France
Donnel, Peter
Ghendrih, Philippe
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Ghendrih, Philippe
Grandgirard, Virginie
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CEA, IRFM, F-13108 St Paul Les Durance, FranceCEA, IRFM, F-13108 St Paul Les Durance, France
Grandgirard, Virginie
Sarazin, Yanick
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CEA, IRFM, F-13108 St Paul Les Durance, FranceCEA, IRFM, F-13108 St Paul Les Durance, France