Magnetically positioned X-Y stage having six degrees of freedom
US6441514B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2000 |
| Grant date | Aug 27, 2002 |
| Priority date | — |
| Expiry date | Jun 5, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2201/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The respective magnets of each of a plurality of spaced Halbach magnet arrays in both the X and Y directions that incorporate in the arrays in both directions, the magnets having a field oriented parallel to the Z axis in alternately the positive and negative directions. The magnets in each array in each direction that are not shared by the crossing Halbach magnet arrays each has a horizontal field orientation parallel to either the X or the Y axis with the filed direction in each instance pointing toward the adjacent magnet having its field oriented in the positive Z direction. Additionally, four layers of coils of wire in separate X-Y planes in substantially vertical alignment with each other contain coils each with a selected orientation relative to the X or Y axis such that they provide levitation, lateral motion, as well as roll, pitch and yaw adjustments to the magnet array forming an X-Y stage for precision positioning an object located on the top surface of the magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.