One magnetic sided media for low cost and low capacity applications
View Patent ↗One-sided magnetic media for a hard disk drive. Methods are implemented to create a magnetic media with only one surface capable of recording data. The second surface is a non-data recording side of the media and is constructed so that it does not interfere with the recording properties of the recording side or the structural usefulness of the media. Additionally, the second surface can be a low quality surface capable of limited magnetic recording.
1. A method of making a one sided media disk including the steps of:
determining if a second side of a substrate is defective and a first side of the substrate is not defective;
forming a high quality magnetic recording layer on only the first side of the substrate if after the step of determining, it is determined that the second side of substrate is defective and the first side of a substrate is not defective;
forming at least one of an underlayer and an adhesion layer including CrTi on the first and the second side of the substrate; and
forming a protective layer on the first side and the second side of the substrate after the step of forming a high quality magnetic recording layer on only the first side of the substrate.
2. The method of making a one sided media disk of claim 1 , wherein the protective layer includes carbon.
3. The method of making a one sided media disk of claim 1 , wherein the second side of the substrate is defective.
4. The method of making a one sided media disk of claim 1 , wherein the first side of the substrate includes patterning for a patterned media application and the second side of the substrate does not include patterning for a patterned media application.
5. The method of making a one sided media disk of claim 1 , wherein layers on the second side of the substrate do not include precious metals.
6. The method of making a one sided media disk of claim 1 , wherein layers on the second side of the substrate do not include a soft underlayer.
7. The method of making a one sided media disk of claim 1 , further including the step of performing a magnetic certification test on only the first side of the substrate.
8. The method of making a one sided media disk of claim 5 , wherein layers on the second side of the substrate do not include a soft underlayer.
9. A method of making a one sided media disk including the steps of:
determining if a second side of a substrate is defective and a first side of the substrate is not defective;
forming a high quality magnetic recording layer on only the first side of the substrate if after the step of determining, it is determined that the second side of substrate is defective and the first side of a substrate is not defective;
forming at least one of an underlayer and an adhesion layer including AlTi on the first and the second side of the substrate; and
forming a protective layer on the first side and the second side of the substrate after the step of forming a high quality magnetic recording layer on only the first side of the substrate.
10. The method of making a one sided media disk of claim 9 , wherein the protective layer includes carbon.
11. The method of making a one sided media disk of claim 9 , wherein the second side of the substrate is defective.
12. The method of making a one sided media disk of claim 9 , wherein the first side of the substrate includes patterning for a patterned media application and the second side of the substrate does not include patterning for a patterned media application.
13. The method of making a one sided media disk of claim 9 , wherein layers on the second side of the substrate do not include precious metals.
14. The method of making a one sided media disk of claim 9 , wherein layers on the second side of the substrate do not include a soft underlayer.
15. The method of making a one sided media disk of claim 9 , further including the step of performing a magnetic certification test on only the first side of the substrate.
16. The method of making a one sided media disk of claim 13 , wherein layers on the second side of the substrate do not include a soft underlayer.
17. The method of making a one sided media disk of claim 12 , wherein layers on the second side of the substrate do not include precious metals.
18. The method of making a one sided media disk of claim 12 , wherein layers on the second side of the substrate do not include a soft underlayer.
19. The method of making a one sided media disk of claim 12 , further including the step of performing a magnetic certification test on only the first side of the substrate.
20. A method of making a one sided media disk including the steps of:
determining if a second side of a substrate is defective and a first side of the substrate is not defective;
forming a high quality magnetic recording layer on only the first side of the substrate if after the step of determining, it is determined that the second side of substrate is defective and the first side of a substrate is not defective and;
forming a protective layer on the first side and the second side of the substrate after the step of forming a high quality magnetic recording layer on only the first side of the substrate,
wherein the first side of the substrate includes patterning for a patterned media application and the second side of the substrate includes a defective pattern for a patterned media application.
21. The method of making a one sided media disk of claim 20 , wherein the protective layer includes carbon.
22. The method of making a one sided media disk of claim 20 , wherein the second side of the substrate is defective.
23. The method of making a one sided media disk of claim 20 , wherein layers on the second side of the substrate do not include precious metals.
24. The method of making a one sided media disk of claim 20 , wherein layers on the second side of the substrate do not include a soft underlayer.
25. The method of making a one sided media disk of claim 20 , further including the step of performing a magnetic certification test on only the first side of the substrate.