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Rewritable data storage medium

A technology of data storage and media, applied in the field of rewritable data storage media

Inactive Publication Date: 2008-10-29
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] A disadvantage of the known media described in said application is that the consumer's optical disc recorder can relatively easily erase the identification marks

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] In Figures 1 and 2 a rewritable data storage medium 1 is represented having a rewritable recording layer 9 provided with a tracking mechanism 8 having tracks. The recording layer 9 has a data recording area 5 , and an erasable identification mark 3 present in an identification mark area 4 different from the data recording area 5 . The identification mark 3 spans the radius width of several hundred tracks of the tracking structure 8 in the data recording area 5 . The data recording area 5 has a first tracking structure 8', while the identification mark area 4 is substantially off the tracking structure or has a second tracking structure 8" which is actually different from the first tracking structure 8'.

[0031] The rewritable data storage medium 1 may be an optical data storage medium having a rewritable recording layer 9 consisting of a material which can be changed between an amorphous and a shaped state. These types of storage media are generally referred to as pha...

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Abstract

The rewritable data storage medium (1) has a rewritable recording layer (9) provided with a tracking structure (8). Said layer (9) has a data recording area (5). An erasable identification mark is present in an identification mark area (4, 4') other than the data recording area (5). The data recording area (5) has a first tracking structure (8'), whereas the identification mark area (4, 4') is substantially free from a tracking structure or has a second tracking structure (8') substantially different from the first tracking structure (8'). Thus erasure of the identification mark is practically impossible, because the location of the erasing spot of a recorder cannot be controlled precisely in radial direction.

Description

technical field [0001] The present invention relates to a rewritable data storage medium having a rewritable recording layer provided with a tracking structure having tracks, said layer having a data recording area, and an erasable identification mark present in a different The identification mark area of ​​the data recording area and which extends over a radial width approximately equal to the width of several tracks of the track structure in the data recording area. Background technique [0002] Said rewritable data storage medium is known from Japanese patent application JP-09073666-A. The known medium is an optical recording medium. An optically readable pattern is written on the outside of the data recording area of ​​the recording layer. The pattern is readable by eye or by machine and can be used as an identification mark. [0003] Rewritable data storage, and particularly rewritable recording on optical recording media, is currently finding increasing use in high-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B20/12G11B20/00G11B19/02G11B7/007G06F3/06G06F3/08G11B7/24073G11B7/24094G11B7/24097G11B11/00
CPCG11B20/00086G11B19/02G11B7/007G11B20/1217G11B20/00586G11B7/28G11B7/242G11B2220/216G11B2007/00754
Inventor J·H·M·斯普瑞特J·C·塔尔斯特拉R·A·布伦蒂克R·R·德伦滕
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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