Patent ID: 6238747
Filing Date: 2001-05-29
Classification: B05C,G03F,H01L

Abstract:
A method for dispensing liquid from a linear nozzle onto a surface of an IC (integrated circuit) wafer with minimized backsplash, the method comprising the steps of:filling up a liquid chamber of said linear nozzle with said liquid to be dispensed onto said surface of said IC wafer, wherein said linear nozzle extends substantially across a diameter of said surface of said IC wafer;dispensing said liquid from a plurality of nozzle passages arranged in a linear configuration on said linear nozzle onto said surface of said IC wafer;directing a liquid stream from a center nozzle passage of said linear nozzle to said surface of said IC wafer, wherein said center nozzle passage of said linear nozzle is oriented perpendicular with said surface of said IC wafer, directing a plurality of liquid streams at an angle with respect to a vertical axis perpendicular to said surface of said IC wafer, wherein said angle is sufficient to reduce backsplash when said liquid streams hit said IC wafer, wherein nozzle passages on a first side of said center nozzle passage are oriented in a first direction that is at said angle with respect to a vertical axis perpendicular to said surface of said IC wafer, and wherein nozzle passages on a second side of said center nozzle passage are oriented in a second direction that is opposite to said first direction and that is at said angle with respect to said vertical axis perpendicular to said surface of said IC wafer; andspinning said wafer in one of a clockwise or counterclockwise direction, depending on said orientation of said first and second directions of said nozzle passages, so as to reduce backsplash when said liquid streams hit said IC wafer.