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Ionization of sputtered metals in high power pulsed magnetron sputtering
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- Böhlmark, Johan (författare)
- Linköpings universitet,Plasma och ytbeläggningsfysik,Tekniska högskolan
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- Alami, Jones (författare)
- Linköpings universitet,Plasma och ytbeläggningsfysik,Tekniska högskolan
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- Christou, Chris (författare)
- Diamond Light Source, Rutherford Appleton Laboratory, Chilton, United Kingdom
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- (creator_code:org_t)
- American Vacuum Society, 2005
- 2005
- Engelska.
- Ingår i: Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films. - : American Vacuum Society. - 0734-2101 .- 1520-8559. ; 23:1, s. 18-22
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- The ion to neutral ratio of the sputtered material have been studied for high power pulsed magnetron sputtering and compared with a continuous direct current (dc) discharge using the same experimental setup except for the power source. Optical emission spectroscopy (OES) was used to study the optical emission from the plasma through a side window. The emission was shown to be dominated by emission from metal ions. The distribution of metal ionized states clearly differed from the distribution of excited states, and we suggest the presence of a hot dense plasma surrounded by a cooler plasma. Sputtered material was ionized close to the target and transported into a cooler plasma region where the emission was also recorded. Assuming a Maxwell–Boltzmann distribution of excited states the emission from the plasma was quantified. This showed that the ionic contribution to the recorded spectrum was over 90% for high pulse powers. Even at relatively low applied pulse powers, the recorded spectra were dominated by emission from ions. OES analysis of the discharge in a continuous dc magnetron discharge was also made, which demonstrated much lower ionization.
Nyckelord
- ionisation
- excited states
- sputter deposition
- plasma deposition
- plasma diagnostics
- NATURAL SCIENCES
- NATURVETENSKAP
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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- Journal of Vacuum Science & Technology. A. Vacuum, Surfaces, and Films (Sök värdpublikationen i LIBRIS)
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- Böhlmark, Johan
- Alami, Jones
- Christou, Chris
- Ehiasarian, Arut ...
- Helmersson, Ulf
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- Linköpings universitet
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