Patent ID: 6218312
Filing Date: 2001-04-17
Classification: C23C,H01F,H01J,H01L

Abstract:
A plasma reactor comprising:a reactor chamber;a plasma source power coupling apparatus near said chamber and an RF power source for supplying RF power to said plasma source power coupling apparatus;a process gas inlet and a process gas supply coupled to said inlet for furnishing a process gas containing etchant and polymer precursors;a support for holding an article to be processed inside said reactor chamber;a polymer-hardening precursor piece maintained at a temperature sufficiently above a polymer condensation temperature so as to increase etch selectivity of oxygen-containing material on said article to non-oxygen-containing material on said article until the selectivity has increased by a factor of at least about 1.5;a bore hole in said polymer-hardening precursor piece;a temperature sensor and an optical fiber coupling said temperature sensor to said bore hole, said one end of said optical fiber extending inwardly at least partially into said bore hole; andwherein said bore hole has a sufficiently high aspect ratio to reduce apparent variation of said emissivity with temperature observed by said sensor.