PATENT CLAIM ANALYSIS

Application Number: 16069198
Application Type: Utility
Filing Date: 2018-07
Publication Date: 2019-01
Patent Classification: ["355", "072000"]

Abstract:
A dynamic-magnetic steel magnetic levitation double-workpiece-stage vector arc switching method and apparatus based on wireless energy transmission, falling within the semiconductor manufacturing equipment technology. The apparatus comprises a support frame ( 1 ), a balance mass block ( 2 ), magnetic levitation workpiece stages ( 4 a,  4 b ), a workpiece stage measurement apparatus, wireless energy transmission apparatuses ( 5 a,  5 b ) and a wireless energy receiving apparatus ( 406 ), wherein the two workpiece stages work between a measurement site ( 11 ) and an exposure site ( 12 ); a laser interferometer ( 6 ) is used to measure the positions of the workpiece stages; the wireless energy transmission apparatuses ( 5 a,  5 b ) are used to provide energy for a sensor ( 407 ) in a micro-drive stage; the workpiece stages are driven using a magnetic levitation planar electrical motor; and during a double-workpiece-stage switching process, the planar electrical motor is used to drive the two workpiece stages so as to achieve single-beat arc quick switching. By using the method and apparatus, the problem that an existing stage switching scheme has many beats, a long track, many start-stop links and a long time for stabilization is solved, thereby reducing the stage switching links, shortening the stage switching time, and improving the productivity of a lithography machine.

Claim (Index 1):
A vector arc revolve switching method based on a wireless energy transmission for moving magnet steel magnetic levitation double-workpiece-stage, comprising: in an initial working state,\n providing a first wafer stage in a pre-alignment state in a measurement position, and providing a second wafer stage in an exposure state in an exposure position; in a first step, completing a pre-alignment process of the first wafer stage in the measurement position, driving the first wafer stage by a moving magnet to a preset pre-transposition position A of the measurement position, and the first wafer stage is then charged by wireless energy transmission and waits; completing an exposure process of the second wafer stage in the exposure position, driving the second wafer stage by the moving magnet to a preset position C of the exposure position; in a second step, moving the first wafer stage and the second wafer stage counterclockwise along a vector circular arc path through a vector control of a planar motor, during the movement, maintaining the phases of the first and second wafer stages unchanged and measuring the movement positions of the first and the second wafer stages by laser interferometers; wherein completing the switching process of the first and the second wafer stages by moving the first wafer stage to the preset position C in the exposure position and moving the second wafer stage to a preset position D in the measurement position; wherein a silicon wafer in the first wafer stage is lithographed and exposed in the exposure position and once the exposure is finished, the finished one is replaced by a new silicon wafer and the new silicon wafer is pre-aligned on the second wafer stage in the measurement position; in a third step, completing a pre-alignment process in the measurement position, driving the second wafer stage to the preset position A of the measurement position, and the second wafer stage is then charged by wireless energy transmission and waits; completing an exposure process in the exposure position, driving the first wafer stage to the preset position C of the exposure position; in a fourth step, moving the second wafer stage and the first wafer stage clockwise along the circular arc path through another vector control of the planar motor; wherein when the second wafer stage is moved to the preset position C in the exposure position and the first wafer stage is moved to the preset position D in the measurement position, the transposition process of wafer stages is completed; wherein the silicon wafer in the second wafer stage is lithographed and exposed in the exposure position and the finished wafer is replaced by another new silicon wafer; wherein the new silicon wafer is pre-aligned on the first wafer stage in the measurement position; wherein at this time, the system returns to the initial working state, and an operating cycle of transposition operation of the two wafer stages is completed; and where the measurement, exposure, and switching processes of the charging and communication of two wafer stages are all completed via wireless energy transmission.

Metadata:
- Claim Count in Document: 1.0
- Percentile: 95.0
- Lexical Diversity: 2.26606
- Patent Class: 355.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['13228254', '13727229', '14646160', '14273887', '15599785']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6405605526071849
- 35 USC 102 Novelty (BERT): 0.4771427197424907
- Combined Prediction Score: 0.6242187693207155
- Mean Citation Score: 173.41706200000004
- Max Citation Score: 177.33476000000005
- Similarity Product: 121.4600204160905

Labels:
- Claim Label 101: 1
- Claim Label 102: 1
- Claim Label 103: 0
- Claim Label 112: 1
- Combined Label: 1
- Label 101 Adjusted: 1

Dataset: test