| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method for obtaining a protection layer having both excellent corrosion resistance and adhesiveness of a lubricant.SOLUTION: A method for manufacturing a magnetic recording medium including a magnetic layer, a protection layer lower layer, a protection layer upper layer and a lubricant layer which are formed on a base plate and configured so that a total film thickness of the protection layer lower layer and the protection layer upper layer is 2.5 nm or less includes a step (1) for forming the protection layer lower layer, a step (2) for applying oxygen plasma treatment to the protection layer lower layer, a step (3) for forming the protection layer upper layer, and a step (4) for applying nitrogen plasma treatment to the protection layer upper layer in the order. It is preferred that the protection layer lower layer and the protection layer upper layer are composed of a carbon-base material and it is further preferred that these layers are composed of diamond-like carbon. It is preferred that a contact angle of the protection layer lower layer with water in atmosphere is 25 degrees or less. |
