Method and apparatus for plasma enhanced chemical vapor deposition
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United States of America Patent
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May 24, 2011
Grant Date -
May 29, 2008
app pub date -
Nov 8, 2007
filing date -
Nov 10, 2006
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Abstract
A method and apparatus for coating substrates by means of plasma enhanced vapor deposition are provided, in which at least part of the surroundings of the substrate surface of a substrate to be coated is evacuated and a process gas with a starting substance for the coating is admitted, wherein the coating is deposited by a plasma being ignited by radiating in electromagnetic energy in the surroundings of the substrate surface filled with the process gas. The electromagnetic energy is radiated in by a multiplicity of pulse sequences, preferably microwave or radiofrequency pulses, with a multiplicity of pulses spaced apart temporally by first intermissions, wherein the electromagnetic energy radiated in is turned off in the intermissions, and wherein the intermissions between the pulse sequences are at least a factor of 3, preferably at least a factor of 5, longer than the first intermissions between the pulses within a pulse sequence.
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