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 7:
8. The method according to claim 5, further comprising:
before feeding the magnet into the coating chamber:
pre-evacuating a sample feeding chamber of the coating machine and a cooling chamber of the coating machine below 10−1Pa, pre-evacuating a cleaning chamber of the coating machine, the coating chamber, and a buffer chamber of the coating machine to below 8×10−3Pa, introducing clean inert gas into the cleaning chamber, the coating chamber, and the buffer chamber to a pressure of 0.5˜0.7MPa, wherein:
the cleaning chamber and the buffer chamber communicates with the coating chamber;
the cooling chamber is connected to the buffer chamber through a first valve; and
the cleaning chamber is connected to the sample feeding chamber through a second valve;

feeding the magnet into the sample feeding chamber, and evacuating the sample feeding chamber below 8×10−3Pa; and
opening the second valve, feeding the magnet into the cleaning chamber, closing the second valve, and performing ion cleaning on the magnet with a pressure in the cleaning chamber being 0.5˜0.7 MPa; and

after the magnet is coated in the coating chamber:
feeding the magnet into the buffer chamber, opening the first valve, moving the magnet to the cooling chamber, closing the first valve, and introduce inert gas to the cooling chamber to a pressure of 100˜110kPa to cool the magnet.