Patent ID: 6641673
Filing Date: 2003-11-04
Classification: C23C,H01J,Y10T

Abstract:
An injector system for injecting a fluid reagent into a plasma stream, comprising:a base containing an injector and having a first base surface and a second base surface, comprising: a first inner wall extending from the first base surface into the base and defining a first channel portion for restricting a flow of the fluid reagent and having a shape such that the first inner wall of the first channel portion is parallel to a first axis, wherein the first channel portion has a first diameter; and a second inner wall defining a second channel portion in fluid communication with the first channel portion and having a recessed portion such that the second inner wall of the second channel portion diverges from the first axis at a predetermined angle, wherein the second channel portion has a second diameter that is greater than the first diameter, and wherein the second channel portion directs the fluid reagent into a plasma stream flowing past the second base surface and reduces a buildup of a clogging layer on the second inner wall of the second channel portion over a period of use.