Patent ID: 6764378
Filing Date: 2004-07-20
Classification: B24B,G01F

Abstract:
A method for the point-of-use mixing of a planarization fluid composed of at least two components, comprising:conveying the components to a regulating location along a first path; admitting each component into separate enclosed volumes to at least partially fill the volumes with the respective components, wherein admitting each component further comprises measuring a level of the component admitted to each volume; applying a pressure to each enclosed volume corresponding to a prescribed flow rate for the component; controlling a pressure regulating device coupled to a source of pressurized gas to obtain a gas pressure level; admitting the pressurized gas into each enclosed volume; regulating the rate of flow of the components to a prescribed flow rate; mixing the components to obtain a combined fluid of a prescribed composition; maintaining the prescribed flow rate for each component by controlling the pressure within the respective enclosed volumes; and conveying the combined fluid to a point-of-use along a second path, the second path being substantially shorter than the first path.