WAFER STEPPER. THE PRODUCT IS AN EXPOSURE MACHINE USED TO EXPOSE A PATTERN ON A WAFER BY SHINING A LIGHT THROUGH THE RETICLE (GLASS PLATE CONTAINING PATTERN). AS THE ENTIRE WAFER CANNOT BE ACCURATELY EXPOSED IN ONE PROCEDURE THE STEPPER EXPOSES AN SMALL AREA AND THEN REPEATS THE STEPS UNTIL COMPLETE.

THE WAFER STEPPER HAS BEEN CLASSIFIED IN ACCORDANCE WITH THE FOLLOWING:- GENERAL INTERPRETIVE RULES (GIRS) GIR 1 HAS BEEN USED TO CLASSIFY THE PRODUCT BY THE TERMS OF HEADING 8486 MACHINES AND APPARATUS OF A KIND USED SOLELY OR PRINCIPALLY FOR THE MANUFACTURE OF SEMICONDUCTOR BOULES OR WAFERS, SEMICONDUCTOR DEVICES, ELECTRONIC INTEGRATED CIRCUITS OR FLAT PANEL DISPLAYS; MACHINES AND APPARATUS SPECIFIED IN NOTE (C) TO THIS CHAPTER; PARTS AND ACCESSORIES GIR 6 HAS BEEN USED TO CLASSIFY THE PRODUCT TO SUBHEADING LEVEL 848620 MACHINES AND APPARATUS FOR THE MANUFACTURE OF SEMICONDUCTOR DEVICES OR OF ELECTRONIC INTEGRATED CIRCUIT CN CODE 84862090 OTHER THAN MACHINE TOOLS OEPRATED BY ULTRASONIC PROCESS TARIC CODE 8486209000 ALSO CLASSIFIED IN ACCORDANCE WITH:- THE HARMONISED SYSTEM EXPLANATORY NOTES TO HEADING 9010 NOTE (A) WHICH EXCLUDES APPARATUS FOR PROJECTION OR DRAWING ONTO SEMICONDUCTOR MATERIAL TO HEADING 8486