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

feeding the magnet into the sample feeding chamber, and evacuating the sample feeding chamber below 10−1Pa;
opening the second valve, feeding the magnet into the second buffer chamber, closing the second valve, and evacuating the second buffer chamber below 8×10−3Pa; and
opening the third valve, delivering the magnet into the cleaning chamber, closing the third valve, and performing ion cleaning on the magnet with a pressure of the cleaning chamber being 0.50.7 MPa; and

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