Patent ID: 11920236
Assignee: BEIJING ZHONG KE SAN HUAN HI-TECH CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC C  B  H | IPC B  C  H

Claim 4:
5. A coating method for preparing the composite coating layer according to claim 1, comprising:
feeding a magnet into a coating chamber of a coating machine;
passing the magnet under a first target in the coating chamber for sputtering to form the first coating layer over a surface of the magnet, the first coating layer including the NdCu coating layer, the PrCu coating layer, or the PrNdCu coating layer; and
passing the magnet under a second target in the coating chamber for sputtering to form the second coating layer over an outer surface of the first coating layer, the second coating layer including the Tb coating layer.