Patent ID: 6602641
Filing Date: 2003-08-05
Classification: G03F

Abstract:
A method for using alignment marks in a stepper and scanner tool, comprising the steps of:providing a stepper and scanner tool; providing a semiconductor substrate, whereby said substrate is a bare semiconductor substrate that has as yet not been subjected to any semiconductor processing steps; providing a zero-layer reticle, said zero-layer reticle comprising a first alignment mark in addition to comprising multiple second alignment marks, a location of said first alignment mark with respect to said multiple second alignment marks being fixed; positioning said semiconductor substrate within said stepper and scanner tool; positioning said zero-layer reticle in a reticle position within said stepper and scanner tool; and printing said first alignment mark on the surface of said substrate, assuring that each of said second alignment marks is printed on the surface of said substrate by using said first alignment mark as an alignment mark.