METHOD OF CONTROLLING A LITHOGRAPHIC APPARATUS AND DEVICE MANUFACTURING METHOD, CONTROL SYSTEM FOR A LITHOGRAPHIC APPARATUS AND LITHOGRAPHIC APPARATUS
In a method of controlling a lithographic apparatus, historical performance measurements are used to calculate a process model relating to a lithographic process. Current positions of a plurality of alignment marks provided on a current substrate are measured and used to calculate a substrate model...
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| creator | VAN DONKELAAR, Ingrid Margaretha Ardina HULSEBOS, Edo Maria VERHEES, Loek Johannes Petrus LUCAS, Jorn Kjeld TINNEMANS, Patricius Aloysius Jacobus BIJNEN, Franciscus Godefridus Casper BRINKHOF, Ralp HERES, Pieter Jacob |
| description | In a method of controlling a lithographic apparatus, historical performance measurements are used to calculate a process model relating to a lithographic process. Current positions of a plurality of alignment marks provided on a current substrate are measured and used to calculate a substrate model relating to a current substrate. Additionally, historical position measurements obtained at the time of processing the prior substrates are used with the historical performance measurements to calculate a model mapping. The model mapping is applied to modify the substrate model. The lithographic apparatus is controlled using the process model and the modified substrate model together. Overlay performance is improved by avoiding over- or under-correction of correlated components of the process model and the substrate model. The model mapping may be a subspace mapping, and dimensionality of the model mapping may be reduced, before it is used. |
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| subjects | APPARATUS SPECIALLY ADAPTED THEREFOR CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY MATERIALS THEREFOR ORIGINALS THEREFOR PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS |
| title | METHOD OF CONTROLLING A LITHOGRAPHIC APPARATUS AND DEVICE MANUFACTURING METHOD, CONTROL SYSTEM FOR A LITHOGRAPHIC APPARATUS AND LITHOGRAPHIC APPARATUS |
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