Magnetic recording medium fabrication method and apparatus
View Patent ↗A method of fabricating a magnetic recording medium by sequentially forming a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body, includes forming the lubricant by depositing a first lubricant on the stacked body after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere, and depositing a second lubricant on the stacked body after depositing the first lubricant, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere.
1. A method of fabricating a magnetic recording medium by sequentially forming a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body, comprising:
forming the lubricant,
wherein the forming the lubricant includes
depositing a first lubricant on the stacked body in a first process chamber after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere; and
depositing a second lubricant on the stacked body in a second process chamber that is different from the first process chamber after depositing the first lubricant, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere.
2. The method of fabricating the magnetic recording medium as claimed in claim 1 , wherein the first lubricant has a molecular mass lower than a molecular mass of the second lubricant.
3. The method of fabricating the magnetic recording medium as claimed in claim 1 , wherein the first lubricant includes diol having a molecular mass within a range of 500 to 2000.
4. The method of fabricating the magnetic recording medium as claimed in claim 1 , wherein the second lubricant includes tetraol having a molecular mass within a range of 1500 to 5000.
5. The method of fabricating the magnetic recording medium as claimed in claim 1 , further comprising:
subjecting a surface of the protection layer to nitriding after forming the protection layer and before depositing the first lubricant.
6. The method of fabricating the magnetic recording medium as claimed in claim 1 , wherein the protection layer, or a surface layer portion of the protection layer after forming the protection layer, is formed by carbon nitride.
7. The method of fabricating the magnetic recording medium as claimed in claim 1 , further comprising:
transporting the stacked body from the first process chamber to the second process chamber via a transport region,
wherein a process gas pressure A within the first process chamber, a process gas pressure B within the second process chamber, and a gas pressure C in the transport region satisfy relationships C>A and C>B.
8. The method of fabricating the magnetic recording medium as claimed in claim 7 , further comprising:
supplying an inert gas to the transport region.
9. The method of fabricating the magnetic recording medium as claimed in claim 1 , wherein a bonded ratio between the protection layer and the first lubricant is in a range of 60% to 90%, and a bonded ratio between the protection layer and the second lubricant is in a range of 10% to 30%.
10. The method of fabricating the magnetic recording medium as claimed in claim 1 , wherein a bonded ratio between the protection layer and the lubricant layer is in a range of 85% to 95%.
11. The method of fabricating the magnetic recording medium as claimed in claim 1 , further comprising:
subjecting a surface of the protection layer to oxidizing after forming the protection layer and before depositing the first lubricant.
12. The method of fabricating the magnetic recording medium as claimed in claim 1 , wherein the protection layer, or a surface layer portion of the protection layer after forming the protection layer, is formed by carbon oxide.