Patent ID: 6196251
Filing Date: 2001-03-06
Classification: F16K,Y10T

Abstract:
A gas inlet device to supply a reaction gas to a reaction chamber, comprising:a control chamber to receive the reaction gas from a reaction gas source;at least one control valve, each comprising a control flow restrictor;a gas reservoir into which the reaction gas passes from the control chamber through the control flow restrictor, the gas reservoir having at least one wall;a gas pressure gauge to measure gas pressure in the gas reservoir and control the control valve to set the gas pressure in the gas reservoir at a desired value;a supply chamber to convey the reaction gas to the reaction chamber; andat least one supply valve, each comprising:a supply flow restrictor provided in a wall of the gas reservoir, to convey the reaction gas from the gas reservoir to the supply chamber, the supply flow restrictor having an external opening facing away from the gas reservoir;a supply valve plunger positioned outside of the gas reservoir to open and close the external opening of the supply flow restrictor; anda supply seal to seal the supply valve plunger and the supply chamber.