Patent ID: 6686107
Filing Date: 2004-02-03
Classification: G03F

Abstract:
A method for producing a semiconductor device, comprising:performing a projection exposure using a projection exposure apparatus in which images of a circuit pattern formed on a device area of a mask are exposed at each predetermined region on a substrate by way of a projection optical system, the performing operation including: reading mask error data for a subject mask out of a memory unit, the mask error data containing information regarding an error positional displacement of a position of the device area relative to the mask alignment marks including at least shift error data &dgr; and rotation error data &thgr;, for use in corrective optimal alignment of the device area during projection based upon a position of the mask alignment marks; calculating wafer alignment correction values using the mask error data, with the wafer alignment correction values being useable to correct at least any shift error and any rotation error between the circuit pattern of the mask and each predetermined exposure region of the wafer by way of the projection system in a wafer coordinate system of a wafer stage mountable with a wafer; positioning the subject mask on a mask stage having a mask coordinate system, using the mask alignment marks; and upon controlling wafer alignment in the wafer coordinate system relative to the mask alignment marks in accordance with the calculated wafer alignment correction values at each predetermined exposure region, exposing the images of the circuit pattern formed on device area of the mask onto photoresist coated on a surface of the wafer within the predetermined exposure region, by way of the projection optical system; developing the photoresist; and applying an etching treatment to the wafer to form a developed photoresist mask, and using the developed photoresist mask to form at least portions of circuit patterns on the wafer.