Abstract: A method for manufacturing a magnetic disk is provided that includes the steps: forming a layer of a lubricant material on a surface of a magnetic storage medium, the layer of lubricant material also being located on an interior and/or exterior edge of the medium; and removing at least some of the lubricant material from the edge 160 of the medium.

Abstract: An information-storage media is provided that includes: (a) a substrate disk 312 having first and second opposing surfaces; (b) a first selected layer 304 on the first surface, the first selected layer having a first thickness; (c) a second selected layer 308 on the second surface, the second selected layer having a second thickness, wherein the first and second selected layers have a different chemical composition than the substrate disk; and (d) an information-storage layer 412 adjacent to one or both of the selected layers. The first and second thicknesses are different to provide an unequal stress distribution across the cross-section of the media.

Abstract: A method for manufacturing a magnetic disk is provided that includes the steps: forming a layer of a lubricant material on a surface of a magnetic storage medium, the layer of lubricant material also being located on an interior and/or exterior edge of the medium; and removing at least some of the lubricant material from the edge 160 of the medium.

Abstract: A method for manufacturing a magnetic disk is provided that includes the steps: (a) forming a layer 128 of a lubricant material on a surface of a magnetic storage medium 300, the layer 128 of lubricant material also being located on an interior and/or exterior edge of the medium 300; and (b) removing at least some of the lubricant material from the edge 160 of the medium.

Abstract: Various methods and apparatus for simultaneously processing two single-sided hard memory disks is provided. Disks are positioned in pairs, with one surface of one disk positioned adjacent one surface of the second disk, with the disk surfaces touching or with a slight separation between them. In this back-to-back orientation, the disk pairs may be processed using conventional double-sided disk processing equipment and techniques. However, each disk will not have two active surfaces. Because of the positioning of the disks during processing, only one surface of each disk will be subjected to full processing. Therefore, each disk will only have one active side.

Abstract: An information-storage media is provided that includes: (a) a substrate disk 312 having first and second opposing surfaces; (b) a first interface layer 304 on the first surface, the first interface layer having a first thickness; (c) a second interface layer 308 on the second surface, the second interface layer having a second thickness, wherein the first and second interface layers have a different chemical composition than the substrate disk; and (d) an information-storage layer 412 adjacent to one or both of the interface layers. The first and second thicknesses are different to provide an unequal stress distribution across the cross-section of the media.

Abstract: A single-sided magnetic hard disk 200 is provided that includes opposing first and second sides 300 and 308 having opposing first and second chamfers 408 and 412, respectively. The first chamfer 408 is dissimilar (or differently shaped) from the second chamfer 412.

Abstract: Various apparatus and methods are provided for handling and transporting pairs of gap merge disks. A transfer member is provided in one embodiment which engages the outer perimeter of a pair of disks at three locations. The transfer member is configured to induce an angled tilt to the respective disks such that the bottom perimeter edges of the disks are spaced apart and the top perimeter edges of the disks are in contact. A mandrel is also provided which is configured to engage a pair of disks oriented in this fashion at the center aperture for purposes of transferring the pair of disks from the transport device to a second location for processing or transfer to another processing device.

Abstract: An information-storage media is provided that includes: (a) a substrate disk 312 having first and second opposing surfaces; (b) a first selected layer 304 on the first surface, the first selected selected layer 308 on the second surface, the second selected layer having a second thickness, wherein the first and second selected layers have a different chemical composition than the substrate disk; and (d) an information-storage layer 412 adjacent to one or both of the selected layers. The first and second thicknesses are different to provide an unequal stress distribution across the cross-section of the media.

Abstract: Various apparatus and methods are provided for lubricating hard memory disks. A mandrel is provided in one embodiment with three rows of teeth and provides a stable, three-point engagement with the inside edge of the disks at the center aperture. When removing disks from a cassette, the mandrel preferably places a uniform space between the disks. In a second embodiment, the mandrel may be used to lubricate single-sided hard memory disks. The single-sided hard memory disk may be positioned on the mandrel in pairs in a gap merge orientation, or equally spaced apart.

Abstract: Various apparatus and methods are provided for handling and transporting pairs of gap merge disks. A transfer member is provided in one embodiment which engages the outer perimeter of a pair of disks at three locations. The transfer member is configured to induce an angled tilt to the respective disks such that the bottom perimeter edges of the disks are spaced apart and the top perimeter edges of the disks are in contact. A mandrel is also provided which is configured to engage a pair of disks oriented in this fashion at the center aperture for purposes of transferring the pair of disks from the transport device to a second location for processing or transfer to another processing device.

Abstract: An information-storage media is provided that includes:

Abstract: A single-sided magnetic hard disk 200 is provided that includes opposing first and second sides 300 and 308 having opposing first and second chamfers 408 and 412, respectively. The first chamfer 408 is dissimilar (or differently shaped) from the second chamfer 412.

Abstract: Various methods and apparatus for simultaneously processing two single-sided hard memory disks is provided. Disks are positioned in pairs, with one surface of one disk positioned adjacent one surface of the second disk, with the disk surfaces touching or with a slight separation between them. In this back-to-back orientation, the disk pairs may be processed using conventional double-sided disk processing equipment and techniques. However, each disk will not have two active surfaces. Because of the positioning of the disks during processing, only one surface of each disk will be subjected to full processing. Therefore, each disk will only have one active side.

Abstract: Various apparatus and methods are provided for lubricating hard memory disks. A mandrel is provided in one embodiment with three rows of teeth and provides a stable, three-point engagement with the inside edge of the disks at the center aperture. When removing disks from a cassette, the mandrel preferably places a uniform space between the disks. In a second embodiment, the mandrel may be used to lubricate single-sided hard memory disks. The single-sided hard memory disk may be positioned on the mandrel in pairs in a gap merge orientation, or equally spaced apart.