| 摘要 |
A top plate (1) for magnetic devices, such as chucks, lifters, clamps etc. comprises a plurality of elongate magnetic piece means regularly spaced apart and separated by non-magnetic material in a direction substantially perpendicular to the length thereof and parallel to a clamping surface (7) formed. The non-magnetic material consists of a coating (8) on the magnetic piece means (6) joint to form the top plate. <IMAGE> |
