Patent ID: 6120606
Filing Date: 2000-09-19
Classification: C23C,H01J,Y10S,Y10T

Abstract:
A gas vent system for vacuum chamber, said system comprising:a gas supply;an anti-vibrating tube connected after said gas supply for transferring gas without introducing vibration from said gas supply to said vacuum chamber;a gas regulator connected after said anti-vibrating tube for controlling a flow rate of said gas;a first line with a first metering valve connected after said gas regulator, said first lines allowing said gas to pass through into said vacuum chamber in a first flow rate for minimizing generated particles due to a pressure difference when venting said gas into said vacuum chamber;a second line connected after said gas regulator, said second line being connected in parallel with said first line, said second line having a second metering valve and an in-line valve in series, after said first line starts to vent said gas into said vacuum chamber, said second line allowing said gas to pass through into said vacuum chamber in a second flow rate higher than said first flow rate for increasing a venting rate of said vacuum chamber by opening said first line and said second line at a same time;a vent valve connected after said first line and said second line but before the vacuum chamber; anda filter connected between said vent valve and said vacuum chamber.