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US 6,532,210 B2Granted
Disk-type recording medium having a crack hindering element
AssigneeSamsung Electronics Co., Ltd.
InventorJun-min Park
Life of this patent
Estimating the term…
Abstract
A disk-type recording for protection of media recording and/or reproduction units, including an information recording surface portion disposed around a center hole and a crack hindering element to hinder the generation of a crack at the center hole from advancing to an outer edge of the disk-type recording media. The crack hindering element includes at least one annular protrusion portion protruded around the center hole.
Claims34
A media disk, comprising:
- a non-recording surface portion disposed around a center hole of the disk;
- an information recording surface portion disposed around the non-recording surface portion;
- and
- a crack hindering element formed in the non-recording surface portion to hinder the generation of a crack at the center hole from advancing to an outer edge of the disk, with the crack hindering element including at least one annular protrusion portion protruded around the center hole,
- wherein the at least one annular protrusion portion is not adjacent to the center hole but spaced a predetermined distance from the center hole.
2 more elements
A media disk, comprising:
- a non-recording surface portion disposed around a center hole of the disk;
- an information recording surface portion disposed around the non-recording surface portion;
- and
- a crack hindering element formed in the non-recording surface portion hinder the generation of a crack at the center hole from advancing to an outer edge of the disk, with the crack hindering element including at least one annular iron core embedded around the center hole.
1 more element
A media disk, comprising:
- a non-recording surface portion disposed around a center hole of the disk;
- an information recording surface portion disposed around the non-recording surface portion;
- and
- a crack hindering element placed in the non-recording surface portion to hinder the generation of a crack at the center hole from advancing to an outer edge of the disk, with the crack hindering element including at least one annular taping member adhered to an area surrounding the center hole, the annular taping member being made of a material different from a material of the information recording surface portion.
1 more element
A media disk, comprising:
- a non-recording surface portion disposed around a center hole of the disk;
- an information recording surface portion disposed around the non-recording surface portion;
- and
- a crack hindering element generated in the non-recording surface portion to hinder the generation of a crack at the center hole from advancing to an outer edge of the disk, with the crack hindering element including a coating layer disposed on an area surrounding the center hole.
1 more element
A media disk, comprising:
- a non-recording surface portion disposed around a center hole of the disk;
- an information recording surface portion disposed around the non-recording surface portion;
- and
- a crack hindering element formed on the non-recording surface portion to hinder the generation of a crack at the center hole from advancing to an outer edge of the disk, with the crack hindering element including an annular flange portion disposed at an edge of the center hole, the annular flange portion being thicker than the non-recording surface portion.
1 more element
A recording/reproducing unit protection method, comprising:
- forming an annular element around a center hole of a disk to prevent a crack at the center hole from advancing to an outer edge of the disk and thereby preventing shearing of the disk upon a recording or reproduction of information by a recording and/or reproducing unit, wherein the annular element is formed in a non-recording portion of the disk and the annular element is formed by integrally forming at least one protrusion on the surface of the non-recording portion of the disk, with the at least one protrusion being formed not adjacent to the center hole but spaced a predetermined distance from the center hole.
A recording/reproducing unit protection method, comprising:
- forming an annular element around a center hole of a disk to prevent a crack at the center hole from advancing to an outer edge of the disk and thereby preventing shearing of the disk upon a recording or reproduction of information by a recording and/or reproducing unit, wherein the annular element is formed in a non-recording portion of the disk and by embedding a core into the non-recording portion of the disk.
A recording/reproducing unit protection method, comprising:
- forming an annular element around a center hole of a disk to prevent a crack at the center hole from advancing to an outer edge of the disk and thereby preventing shearing of the disk upon a recording or reproduction of information by a recording and/or reproducing unit, wherein the annular element is formed in a non-recording portion of the disk and formed by adhering a taping member, made of a different material than the disk, to a surface of the non-recording portion of the disk.
A recording/reproducing unit protection method, comprising:
- forming an annular element around a center hole of a disk to prevent a crack at the center hole from advancing to an outer edge of the disk and thereby preventing shearing of the disk upon a recording or reproduction of information by a recording and/or reproducing unit, wherein the annular element is formed in a non-recording portion of the disk by coating a material onto at least one surface of the non-recording portion of the disk.
A media disk, comprising:
- a non-recording surface portion disposed around a center hole of the disk;
- an information recording surface portion disposed around the non-recording surface portion;
- and
- an annular element formed in the non-recording portion of the disk, around the center hole, to prevent a crack at the center hole from advancing to an outer edge of the disk and to thereby prevent shearing of the disk, wherein the annular element is disposed on upper and lower surfaces of the media disk.
1 more element
Dependencies are inferred from the claim text.