Discrete track media
AssigneeSeagate Technology LLC
InventorsNurul Amin, Sining Mao
Life of this patent
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Abstract
A method of fabricating a discrete track magnetic recording media. A base layer is provided onto which repeating and alternating magnetic layer and non-magnetic layers are deposited. The thickness of the magnetic layer corresponds to the width of the track of the recording media. A cylindrical rod can be used as the base layer, such that the alternating magnetic and non-magnetic layers spiraling or concentric layers around the rod. The resulting media layer can be cut or sliced into individual magnetic media or used to imprint other media discs with the discrete pattern of the media layer.
Claims8
A method of fabricating a magnetic recording structure having a plurality of tracks, each track having a width, comprising:
- depositing, on a cylindrical base, a first layer having a first thickness, the first layer comprising one of a magnetic layer from a first target and a non-magnetic layer from a second target;
- depositing, on the first layer, a second layer having a second thickness, the second layer comprising the other of the magnetic layer from the first target and the non-magnetic layer from the second target;
- repeating depositing of the first and second layers a predetermined number of times to produce a plurality of magnetic layers and a plurality of non-magnetic layers interposed between the plurality of magnetic layers on the cylindrical base to provide a layered source from which the magnetic recording structure can be formed;
- heating an end surface of the layered source to a predetermined temperature;
- and transferring the heated end surface of the layered source to a base disk by stamping the heated end surface onto the base disk to produce the magnetic recording structure;
- wherein the magnetic recording structure includes the base disk having a plurality of concentric magnetic layers and a plurality of concentric non-magnetic layers interposed between the plurality of the concentric magnetic layers stamped thereon, wherein the thickness of each of the plurality of magnetic layers on the cylindrical base corresponds to the track width of the magnetic recording structure.
A method of fabricating a cylindrical magnetic recording layered structure having a plurality of tracks, each track having a width, comprising:
- depositing, on a substantially planar base, a first layer having a first thickness, the first layer comprising one of a magnetic layer from a first target and a non-magnetic layer from a second target;
- depositing, on the first layer, a second layer having a second thickness, the second layer comprising the other of the magnetic layer from the first target and the non-magnetic layer from the second target;
- repeating depositing of the first and second layers a predetermined number of times to produce a plurality of substantially planar magnetic layers and a plurality of substantially planar non-magnetic layers interposed between the plurality of the substantially planar magnetic layers to provide a layered source;
- and
- cutting a cylinder from the layered source by cutting the outermost layer produced from the plurality of substantially planar non-magnetic layers interposed between the plurality of substantially planar magnetic layers down through the planar base to form the cylindrical magnetic recording layered structure;
- wherein the thickness of each of the plurality of magnetic layers deposited on the planar base corresponds to the track width of the cylindrical magnetic recording layered structure.
Dependencies are inferred from the claim text.