Patent ID: 6322660
Filing Date: 2001-11-27
Classification: G01J,G02B,H01J

Abstract:
An apparatus for monitoring for an end point in a plasma etching process, comprising:a plasma etching chamber having a window;a chromator for measuring a radio frequency light wave;a first select bracket attached to the plasma etching chamber in a juxtaposed position overlying the window, the first select bracket being formed to extend outwardly relative to the window a distance that is approximately equal to or less than one inch, wherein the first select bracket further includes a first portion forming radial teeth for securely receiving and holding the fiber optic bundle and a second portion forming a conically shaped receptacle for receiving the fiber optic bundle and for urging the fiber optic bundle to a precise location relative to the bracket and the window;a fiber optic cable bundle optically coupled to the first select bracket whereby light beams created during the etching process may be transmitted through the window and into the fiber optic cable bundle; anda second select bracket attached to the chromator and optically coupled to the fiber optic cable bundle wherein the chromator is optically coupled to the chamber.