Patent ID: 6602727
Filing Date: 2003-08-05
Classification: H01L

Abstract:
A system for analyzing and controlling pattern exposure conditions in semiconductor manufacturing, comprising:an exposing system adapted to expose one or more patterns on one or more layers on a wafer; an exposer driving system adapted to control one or more exposure conditions in the exposing system; one or more gratings formed on one or more layers on the wafer; a light directing system adapted to direct light to at least one portion of the wafer; a light collecting system adapted to collect a light reflected from the at least one portion of the wafer; a measuring system adapted to measure one or more grating signatures and generate a grating signature data based on the light reflected from the one or more gratings; and a processor operatively coupled to the measuring system and the exposer driving system, the processor receiving the grating signature data from the measuring system and the processor using the grating signature data to control the exposing system via the exposer driving system to regulate one or more exposure conditions.