Patent ID: 8298336
Filing Date: 2012-10-30
Classification: H01J,Y10T

Abstract:
1. An apparatus for delivering gas to a substrate, the apparatus comprising: upper and lower chamber bodies forming a cavity; a gas source in fluid communication with the cavity; an exhaust unit adapted to remove gas in the cavity; a chuck disposed in the cavity; and an injector containing a plurality of continuous channels extending therethrough, each channel in communication with the cavity and the gas source, wherein each channel is independent from one another and comprises: a first section having a first diameter and a longitudinal axis along a direction of the first section connected to a second section having a second diameter and a longitudinal axis along a direction of the second section, where an intersection between the first section and the second section is at an angle sufficient to prevent light rays that enter the first section along the direction of the longitudinal axis of the first section from exiting the second section without reflecting from a surface in the channel and where the first diameter is substantially equal to the second diameter at the intersection.