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Record carrier and methods for writing a record carrier

A record carrier and recording layer technology, applied in the direction of optical record carrier, optical record carrier manufacturing, data recording, etc., can solve the problem of very sensitive and difficult changes in writing power

Inactive Publication Date: 2007-06-06
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Writing at different power levels in deep protection layers has proven to be very difficult and is also very sensitive to write power variations etc.

Method used

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  • Record carrier and methods for writing a record carrier
  • Record carrier and methods for writing a record carrier
  • Record carrier and methods for writing a record carrier

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0042] The method shown in Fig. 1 starts at step S1. In step S2, a record carrier having at least a first recording layer, a second recording layer, and a physical barrier that causes discrete pit depths between the first recording layer and the second recording layer is provided. In step S3, it is determined whether to write a pit having a second depth greater than the first depth. If this is not the case, in step S4, a pit having a first depth is written, in which the power of the modulated laser beam for writing is selected so that the first recording layer is penetrated without breaking the physical barrier. If it is determined in step S3 that a pit having a second depth greater than the first depth will be written, the method proceeds to step S5. In step S5, a pit having a second depth is written, in which the power of the modulated laser beam for writing is selected so that the first recording layer is penetrated, the physical barrier is broken, and the second recording laye...

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PUM

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Abstract

The present invention relates to a record carrier (10) for creating a multi-level ROM optical medium, wherein the record carrier 10 comprises a first recording layer (12) and at least a second recording layer (14). In accordance with the invention between said first recording layer (12) and said second recording layer (14) there is provided a physical barrier (16) leading to discrete pit depths. Furthermore, the invention relates to two methods for writing a record carrier to create a multi-level ROM optical medium.

Description

Technical field [0001] The invention relates to a record carrier for creating a multilayer ROM optical medium, wherein the record carrier includes a first recording layer and at least a second recording layer. In addition, the invention also relates to two methods for writing a record carrier to create a multi-layer ROM optical medium, wherein the record carrier includes a first recording layer and at least a second recording layer. Background technique [0002] An important trend in optical data storage is to strive for higher data capacity. From single-layer CD (650MB) to DVD (4, 7GB) and the recently introduced Blu-ray Disc (BD, 25GB), data capacity has continued to increase. Double the capacity by introducing double-layer data storage media, and expect more data storage layers in a single record carrier. Other methods to increase data capacity are also foreseen, similar to magneto-optical recording and readout and near-field recording. Similarly, improved signal processing su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/013G11B7/26G11B7/24088G11B7/253G11B7/2531G11B7/257G11B7/2575
CPCG11B7/24088G11B2007/25708G11B2007/25713G11B7/2531G11B7/2575G11B7/257G11B2007/2571G11B7/242G11B7/261
Inventor E·R·梅恩德斯E·罗登伯格
Owner KONINK PHILIPS ELECTRONICS NV