Patent ID: 6697698
Filing Date: 2004-02-24
Classification: G03F,H01L

Abstract:
A system for correcting a registration error associated with semiconductor device fabrication steps, the system comprising:history storage means for storing a history of an exposure device, illumination conditions and a reticle used for manufacturing of a substrate to be exposed; reticle data storage means for storing a dimension of a circuit pattern of the reticle, a dimension of an overlay mark, a coordinate value of said circuit pattern and a coordinate value of said overlay mark; illumination conditions storage means for storing the exposure device and illumination conditions for each process; wave aberration data storage means for storing wave aberration data for each exposure device and each pattern coordinate value; registration error calculation means for calculating a circuit pattern registration error of a second layer formation process to a first layer formation process and an overlay mark registration error of said second layer formation process to said first layer formation process from said illumination conditions, said circuit pattern dimension, said overlay mark dimension and said wave aberration for each coordinate value; registration error relationship calculation means for calculating a relationship between said circuit pattern registration error and said overlay mark registration error; registration error relationship storage means for storing said registration error relationship, a name of said first layer formation process, a name of said second layer formation process, exposure devices, illumination conditions and reticles used in said first and second layer formation processes; overlay control limit storage means for storing an overlay control limit for each product and process; overlay control limit conversion means for converting said overlay control limit from said registration error relationship; overlay inspection data storage means for storing overlay inspection data; correction calculating means for calculating a correction of said second exposure device from said registration error relationship and said overlay inspection data; a host computer for performing control of an entire semiconductor manufacturing apparatus and input and output of information; input/output control means for performing transfer of information of said plurality of storage means, a plurality of calculation means, selection means and judgement means and transmitting a correction value calculated by a start device issued from said start device judging means and by said correction value calculation means or a correction value issued from a combination of said information storage means to said host computer; an exposure device; and an overlay inspection device.