Patent ID: 6612319
Filing Date: 2003-09-02
Classification: B05B,H01L,Y10S

Abstract:
An edge bead removal system for applying an edge bead removal solvent on an edge bead formed on a wafer by a photoresist material application system, the edge bead removal system adapted to remove a droplet of edge bead removal solvent from a nozzle tip of an edge bead removal nozzle after the edge bead removal nozzle completes application of the edge bead removal solvent, the system comprising:a supply of edge bead removal solvent; a supply of positively or negatively pressurized air; and and an edge bead removal nozzle with a nozzle tip, the nozzle having a liquid supply chamber adapted to be in fluid communication with the supply of edge bead removal solvent and an air supply chamber adapted to be in fluid communications with the supply of positively or negatively pressurized air, the edge bead removal nozzle having a first state for applying the edge bead removal solvent and a second state for removing any edge bead removal solvent from the nozzle tip, wherein the air supply chamber is in fluid communication with the liquid supply chamber in the second state.