| 摘要 |
In an apparatus for controlling a gas-rise pattern in a vacuum treatment process a gas inlet (1) is operatively connected with a mass-flow-controller MFC (2); said MFC (2) being again operatively connected via a first valve (5) with a vacuum chamber (3) and in parallel via second valve (6) with a vent-line (4). Said connection with the vent-line (4) further comprises means for varying the pump cross section of said vent-line (4). In another embodiment the appa-ratus for controlling a gas-rise pattern in a vacuum treatment process comprises a gas inlet (13) operatively connected with a vacuum chamber (3) via a valve (11), wherein the connection between gas inlet (13) and valve (11) further comprises a diaphragm (12).
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