Patent ID: 9116423
Filing Date: 2015-08-25
Classification: B82Y,G03F

Abstract:
1. An imprint lithography apparatus, comprising: an imprint template arrangement for use in imprinting a pattern into imprintable medium; a substrate holder configured to hold a substrate provided with imprintable medium to, in use, be patterned by the imprint template arrangement; a structure located away from the substrate holder and extending across the substrate holder, and such that the imprint template arrangement is, in use, located between the structure and the substrate holder, wherein: the substrate or substrate holder has a first part of a substrate or substrate holder configuration determination arrangement and the structure has a second part of the substrate or substrate holder configuration determination arrangement, the first part or second part of the substrate or substrate holder configuration determination arrangement comprising one or more arrays of lines whose displacement is being measured, and the other of the first part or second part of the substrate or substrate holder configuration determination arrangement comprising one or more encoders that faces towards, and arranged to measure the displacement of, one or more of the one or more arrays of lines, and the imprint template arrangement has a first part of an imprint template arrangement configuration determination arrangement and the structure has a second part of the imprint template arrangement configuration determination arrangement, the first part or second part of the imprint template arrangement configuration determination arrangement comprising one or more arrays of lines whose displacement is being measured, and the other of the first part or second part of the imprint template arrangement configuration determination comprising one or more encoders that faces towards one or more of the one or more arrays of lines and arranged to measure the displacement of the one or more of the one or more arrays of lines separately from the displacement measured by the substrate or substrate holder configuration determination arrangement of the one or more of the one or more arrays of lines of the substrate or substrate holder configuration determination arrangement.