Recordable optical recording carrier and method for manufacturing recordable optical recording carrier compatible with CD-R

Abstract

An optical recording carrier including, in a data recording area, a continuous-grooved main track (12) for recording primary data to be stored, and a subtrack (13) for recording control data including parameter data and address information. The control data includes a clock signal needless to be provided by the main track (12). The subtrack (13) has a narrower full width at half maximum (FWHM) and a shallower depth than the main track (12). The distance (d') between the main track (12) and the subtrack (13) is not more than half of that between two adjacent main tracks (12). The main track (12) and the subtrack (13) form a double-spiral pattern. When recording data, a recording spot tracks mostly along the centerline of the main track (12) and reads the control data in the subtrack (13) simultaneously to control the recording process. A method for manufacturing a recordable optical recording carrier compatible with a conventional CD-R is also provided.

Description

technical field [0001] The invention relates to the field of optical discs, in particular to a high-density recordable optical disc using a double spiral track format and a manufacturing method thereof. Background technique [0002] Optical discs can store data in various formats, and are the most convenient storage media in the new generation optical storage market. They can be used in a wide range of applications, such as library collection, data backup, electronic publishing, image data storage, and personal medical records. management etc. [0003] When the recordable optical disc records the main data that we want to store, it needs to have appropriate control data to control the entire recording process. The control data can be roughly divided into two categories, one is parameter data, and the other is address information. [0004] The function of the parameter data is: before recording, read the parameter data first to adjust the recording parameters of the recordi...

AI Technical Summary

Problems solved by technology

[0016] For the above-mentioned third LPP recording method, since the LPP must match the phase of the track wobble to be decoded, the track for recording data still needs to form a considerable level of left-right wobble. Although this wobble can use a lower level, however, as before As mentioned above, the problem of crosstalk between adjacent track wobble signals, and the problem that the recorded data cannot be kept at the center of the track due to track wobble, which increases the jitter rate and error rate, can only be reduced but cannot be completely eliminated

What's more, since the signal length of the LPP is equivalent to the length of the minimum recording signal, the recording signal is easily affected by the crosstalk of the LPP signal and misjudged when it is read.

Like this, if the LPP signal level is too high, it will affect the accuracy of the read signal due to the aforementioned crosstalk and other factors. If it is too low, it is easy to cause decoding errors due to misjudgment of the signal, which will affect the recording program.

Therefore, the control of the production process becomes very difficult, which will increase a lot of production costs

Although there is a way to quickly deviate from the center of the track recently, the recorder can read the same control data, but the same problem mentioned above has not been solved.

In addition, DVD-R control data needs to be written and recorded by a recorder. The pre-write operation before leaving the factory will increase the production process and greatly increase the production cost, which is not conducive to the production efficiency of optical discs.

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