POWER CONVERTER UNIT, PLASMA PROCESSING EQUIPMENT AND METHOD OF CONTROLLING SEVERAL PLASMA PROCESSES
Power converter unit (1,1') capable to convert an electrical input power into a bipolar output power and to deliver this output power to at least two independent plasma processing chambers (9a, 9b .. 9n), the unit (1,1') comprising: - one power input port (2) for connection to an electrica...
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Format: | Patent |
Sprache: | eng ; fre ; ger |
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Zusammenfassung: | Power converter unit (1,1') capable to convert an electrical input power into a bipolar output power and to deliver this output power to at least two independent plasma processing chambers (9a, 9b .. 9n), the unit (1,1') comprising:
- one power input port (2) for connection to an electrical power delivering grid (7),
- at least two, preferably more than two, power output ports (3a, 3b, .. 3n) each for connection to one of the plasma process chambers (9a, 9b, ... 9n),
- a control device (4) configured to control the unit (1,1') to deliver the bipolar output power to the power output ports (3a, 3b, .. 3n), using control parameters of at least one of: power, voltage, current, excitation frequency, or threshold for protective measures, such the control device (4) comprising a virtual power supply (24a, 24b, .. 24n) for every output port (3a, 3b, .. 3n), every virtual power supply (24a, 24b, .. 24n) comprising a separate complete set of all fixed and time varying parameters and internal states associated with the operation of every individual output port (3a, 3b, .. 3n) is kept in the control device (4). |
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