| 摘要 |
A carbon nitride overcoat layer of a magnetic recording medium is deposited onto a magnetic layer within a plasma chamber. The magnetic layer is supported by a substrate. A negative bias voltage, typically in the range of -50 volts to -400 volts, and more preferably in the -75 volts to -250 volts range, is applied to the magnetic layer during the depositing step. A 5nm thick carbon nitride overcoat layer applied in this manner has a durability at least as good as a conventional carbon nitride overcoat layer 10nm thick. Therefore, by providing equal durability at reduced thickness, the signal to noise ratio is improved significantly. |
