Patent ID: 6113697
Filing Date: 2000-09-05
Classification: B05C,G03F

Abstract:
Apparatus for coating a wafer with photoresist, said apparatus comprising:a rotary chuck to which a wafer is chucked during a coating operation;a nozzle supported above said chuck;a supply of photoresist to which said nozzle is connected;a linear driving mechanism operatively connected to said nozzle so as to move said nozzle linearly in a radial direction of the wafer chucked to said rotary chuck;a variable speed motor operatively connected to said rotary chuck for rotating said chuck;a sensor operatively associated with said nozzle so as to sense the relative position thereof; anda controller, operatively connected to said sensor and to said motor, for controlling the speed of said motor, based on the location of said nozzle, while said nozzle is moved by said linear driving mechanism.