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AssigneeSeagate Technology LLC
InventorsJialuo Jack Xuan, Xiaohua Shel Yang, Chung-Yuang Shih, Taesun E. Kim
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A magnetic data storage medium is provided that has a substrate surface with regularly spaced, continuous ridges and grooves thereby to enhance the magnetic layer crystallization orientation. Data storage tracks extend longitudinally along the ridges, the grooves between adjacent ridges providing separation between data tracks on either side of each ridge. To form the substrate surface a focused laser beam is continuously applied to the substrate in a path of generally circumferential direction on the disk surface between inner and outer radii of a data storage zone while the substrate is rotated at a relatively constant first speed and the focused beam is moved radially at a relatively constant second speed.
A magnetic recording disk comprising a substrate circumferentially bounded about a rotational axis, a surface of the substrate having a laser textured data zone, said data zone having a plurality of continuous ridges having slanted sidewalls formed at rcgularly spaced intervals and separated from each other by grooves, said ridges having data storage tracks thereon, wherein said data zone comprises an entirety of said surface that extends between an inner radius and an outer radius in the vicinity of the disk circumference, said grooves defining a continuous generally spiral circumferential path extending from said inner radius to said outer radius.
Dependencies are inferred from the claim text.