Patent ID: 9151593
Filing Date: 2015-10-06
Classification: G01B,H01L,Y10T

Abstract:
1. A system for positioning a processing tool in relation to a workpiece, a workpiece alignment mark being disposed on the workpiece, comprising: a first object, an object alignment mark and the workpiece being disposed on the first object; a second object displaceable along at least one movement direction relative to the first object, the processing tool adapted to machine and/or inspect the workpiece during a production process, and adapted to detect the object alignment mark, being disposed on the second object; an alignment sensor, adapted to detect the object alignment mark and the workpiece alignment mark, disposed on the second object; a scannable measuring standard, extending along the at least one movement direction, disposed on the second object; and at least two scanner units, adapted to scan the measuring standard, disposed on the first object and adapted to determine a relative position between the first object and the second object along the movement direction, the two scanner units having a defined offset; wherein the offset between the two scanner units satisfies: wherein {right arrow over (d)}