Information storage apparatus using a magnetic medium coated with a wear-resistant thin film
View Patent ↗There is provided an information storage apparatus including recording medium and a head. The recording medium has an electrode layer, a magnetic layer that is stacked on the electrode layer, and a wear-resistant thin film that is stacked on the magnetic layer. The head has a conductive probe for injecting charge to record information and sensing the charge injected into the recording medium to reproduce information in a state that the conductive probe contacts the recording medium. A magnetic medium, which is coated with a wear-resistant thin film, stores charges to record information and reproduce information using an electrostatic force. Thus, it is possible to stably store highly integrated information. Also, a probe contacts a recording medium to record and reproduce information at a high speed. Thus, sensitivity and resolution can be improved.
1. An information storage apparatus using charge, the information storage apparatus comprising:
a recording medium having an electrode layer, a magnetic layer that is stacked on the electrode layer, and a wear-resistant thin film that is stacked on the magnetic layer; and
a head having a conductive probe for injecting charge to record information and sensing the charge injected into the recording medium to reproduce information in a state that the conductive probe contacts the recording medium.
2. The information storage apparatus of claim 1 , wherein the charge is injected by differences in potential between the electrode layer and the conductive probe.
3. The information storage apparatus of claim 2 , wherein the charge is injected into an interface between the magnetic layer and the electrode layer.
4. The information storage apparatus of claim 2 , wherein the charge is injected into an interface between the magnetic layer and the wear-resistant thin film.
5. The information storage apparatus of claim 2 , wherein the charge is injected inside the wear-resistant thin film or onto the surface of the wear-resistant thin film.
6. The information storage apparatus of claim 1 , wherein the wear-resistant thin film is diamond like carbon.
7. The information storage apparatus of claim 1 , wherein the wear-resistant thin film is chrome oxide.
8. The information storage apparatus of claim 6 , wherein the conductive probe has a tip with a diameter of 50 nm or less.
9. The information storage apparatus of claim 7 , wherein the conductive probe has a tip with a diameter of 50 nm or less.
10. The information storage apparatus of claim 1 , wherein the conductive probe is one of a conic probe, a pyramidic probe, and a cylindrical probe.
11. The information storage apparatus of claim 1 , wherein the recording medium is a rotary recording medium.
12. The information storage apparatus of claim 1 , wherein the recording medium is a stage type recording medium which is actuated in an X-axis and/or Y-axis direction.
13. An information storage apparatus using charge, the information storage apparatus comprising:
a recording medium having an electrode layer, a metal layer that is stacked on the electrode layer, and a wear-resistant thin film that is stacked on the metal layer; and
a head having a conductive probe for injecting charge to record information and reproducing information by phase shift due to the charge injected into the recording medium in a state that the conductive probe contacts the recording medium.
14. The information storage apparatus of claim 13 , wherein the charge is injected by differences in potential between the electrode layer and the conductive probe.
15. The information storage apparatus of claim 14 , wherein the charge is injected into an interface between the metal layer and the electrode layer.
16. The information storage apparatus of claim 14 , wherein the charge is injected into an interface between the metal layer and the wear-resistant thin film.
17. The information storage apparatus of claim 14 , wherein the charge is injected inside the wear-resistant thin film or onto the surface of the wear-resistant thin film.
18. The information storage apparatus of claim 13 , wherein the wear-resistant thin film is diamond like carbon.
19. The information storage apparatus of claim 13 , wherein the wear-resistant thin film is chrome oxide.
20. The information storage apparatus of claim 18 , wherein the conductive probe has a tip with a diameter of 50 nm or less.
21. The information storage apparatus of claim 19 , wherein the conductive probe has a tip with a diameter of 50 nm or less.
22. The information storage apparatus of claim 13 , wherein the conductive probe is one of a conic probe, a pyramidic probe, and a cylindrical probe.
23. The information storage apparatus of claim 13 , wherein the recording medium is a rotary recording medium.
24. The information storage apparatus of claim 13 , wherein the recording medium is a stage type recording medium which is actuated in an X-axis or Y-axis direction.