Back to results
US 6,713,196 B1Granted
Magnetic recording medium and magnetic recording device
AssigneeFujitsu Limited
InventorIsatake Kaitsu
Life of this patent
Estimating the term…
Abstract
The present invention provides a high-density, low-noise magnetic recording medium. This magnetic recording medium includes a substrate, a non-magnetic underlayer formed on the substrate, and a magnetic recording layer formed on the underlayer. The magnetic recording layer contains cobalt as the main component, 10 atm % to 18 atm % of chromium, 5 atm % to 20 atm % of platinum, and 10 atm % to 20 atm % of boron.
Claims5
A magnetic recording medium comprising:
- a substrate;
- a non-magnetic underlayer formed on the substrate in direct contact therewith;
- and
- a magnetic recording layer formed on the underlayer,
- wherein the magnetic recording layer contains 10 atm % to 14 atm % of chromium, 5 atm % to 20 atm % of platinum, 10 atm % to 20 atm % of boron and cobalt as a balancing component, and
- the underlayer is made of an alloy that contains chromium as a balancing component and at least one element selected from a group consisting of molybdenum, wolfram, iridium, ruthenium, and rhenium,
- wherein the underlayer contains said at least one element with a concentration of 5 atm % to 30 atm %.
4 more elements
A magnetic recording device that includes a magnetic recording medium comprising:
- a substrate;
- a non-magnetic underlayer formed on the substrate in direct contact therewith;
- and
- a magnetic recording layer formed on the underlayer,
- wherein the magnetic recording layer contains 10 atm % to 14 atm % of chromium, 5 atm % to 20 atm % of platinum, 10 atm % to 20 atm % of boron, and cobalt as a balancing component, and
- the underlayer is made of an alloy that contains chromium as a balancing component and at least one element selected from a group consisting of molybdenum, wolfram, iridium, ruthenium, and rhenium,
- wherein the underlayer contains said at least one element with a concentration of 5 atm % to 30 atm %.
4 more elements
Dependencies are inferred from the claim text.