Alignment systems and methods for lithographic systems
First Claim
1. A method of automatic process control for the manufacture of microdevices, comprising:
- receiving data from an alignment mark detection system having a plurality of detector channels;
determining an updated processing strategy based on said received data from said alignment mark detection system; and
altering a processing step based on said updated processing strategy, wherein said plurality of detector channels of said alignment mark detection system provide a corresponding plurality of signals substantially simultaneously during detection of an alignment mark.
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Abstract
An alignment system for a lithographic apparatus has a source of alignment radiation; a detection system that has a first detector channel and a second detector channel; and a position determining unit in communication with the detection system. The position determining unit is constructed to process information from said first and second detector channels in a combination to determine a position of an alignment mark on a work piece, the combination taking into account a manufacturing process of the work piece. A lithographic apparatus has the above mentioned alignment system. Methods of alignment and manufacturing devices with a lithographic apparatus use the above alignment system and lithographic apparatus, respectively.
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Citations
32 Claims
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1. A method of automatic process control for the manufacture of microdevices, comprising:
- receiving data from an alignment mark detection system having a plurality of detector channels;
determining an updated processing strategy based on said received data from said alignment mark detection system; and
altering a processing step based on said updated processing strategy, wherein said plurality of detector channels of said alignment mark detection system provide a corresponding plurality of signals substantially simultaneously during detection of an alignment mark. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- receiving data from an alignment mark detection system having a plurality of detector channels;
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12. An automatic process control system for the manufacture of microdevices, comprising:
- a data processing unity adapted to receive data from an alignment mark detection system having a plurality of detector channels, wherein said data processing unit determines an updated processing strategy based on data received from said alignment mark detection system and outputs a signal to alter a processing step based on said updated processing strategy, and wherein said plurality of detector channels of said alignment mark detection system provide a corresponding plurality of signals substantially simultaneously during detection of an alignment mark.
- View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method of automatic equipment control for the manufacture of microdevices, comprising:
- receiving data from an alignment mark detection system having a plurality of detector channels;
determining an updated processing strategy based on said received data from said alignment mark detection system; and
altering a processing step based on said updated processing strategy, wherein said plurality of detector channels of said alignment mark detection system provide a corresponding plurality of signals substantially simultaneously during detection of an alignment mark. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32)
- receiving data from an alignment mark detection system having a plurality of detector channels;
Specification