Patent ID: 9274431
Filing Date: 2016-03-01
CPC Classification: G03F

Claim Text:
1. A system for determining an alignment location associated with a pattern formed on a substrate by making electrical measurements as the substrate is moved along an advancement direction, comprising: an alignment structure formed on the substrate, the alignment structure having a first member extending along a first direction that is not parallel to the advancement direction and a second member extending along a second direction that is not parallel to either the advancement direction or to the first member, wherein the first member and the second member are electrically conductive and substantially transparent; one or more probes responsive to relative motion between the substrate and the one or more probes to identify particular portions of the first and second members of the alignment structure and to produce signals identifying such portions; and a controller responsive to signals produced by the one or more probes to determine an alignment location associated with the pattern formed on the substrate.