Magnetischer Aufzeichnungsträger

摘要

A magnetic recording medium has a magnetic layer formed by a thin magnetic metal layer and a carbon protective layer on a non-magnetic substrate. The surface of the carbon protective layer has first protrusions formed by first particles and second protrusions formed by second particles. The carbon protective film has a thickness in the range of 3 nm to 30 nm, while the first protrusions have the heights of 65 nm +/- 15 nm to 95 nm +/- 15 nm and the second protrusions have the heights of 18 nm +/- 5 nm to 28 nm +/- 5 nm. Since the surface properties of the carbon protective film are controlled in this manner, the electro-magnetic conversion characteristics may be prevented from being lowered due to the spacing losses for improving the running durability of the recording medium.