Claims
- 1. An information recording medium having a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate, wherein:the groove structure is wobbled in a radius direction of the medium; the track is divided into a plurality of recording units in the track direction by at least one radial boundary line; at least two adjacent recording units in the radius direction of the medium comprise one zone; and the groove structure included in the respective recording units within one zone has substantially the same number of wobbling.
- 2. An information recording medium having a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate, wherein:the groove structure is wobbled in a radius direction of the medium; the track is divided into a plurality of recording units in the track direction by at least one radial boundary line; at least two adjacent recording units in the radius direction of the medium comprise one zone; and the groove structure which is adjacent to each other in the radius direction of the medium within one zone has substantially the same wobbling cycle.
- 3. An information recording medium having a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate, wherein:the groove structure is wobbled in a radius direction of the medium; the track is divided into a plurality of recording units in the track direction by at least one radial boundary line; at least two adjacent recording units in the radius direction of the medium comprise one zone; and the groove structure of the adjacent recording units in the radius direction of the medium within one zone has substantially the same wobbling cycle and the same number of wobbling.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8-197297 |
Jul 1996 |
JP |
|
9-023480 |
Feb 1997 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation of U.S. application Ser. No. 09/350,107, filed Jul. 9, 1999, now U.S. Pat. No. 6,219,331, issued Apr. 17, 2001, which is a continuation of U.S. application Ser. No. 09/090,310, filed Jun. 4, 1998, now U.S. Pat. No. 5,930,228, which is a continuation application of U.S. application Ser. No. 08/900,294, filed on Jul. 25, 1997, now U.S. Pat. No. 5,936,933, which application relates to U.S. application Ser. No. 08/863,126, filed on May 27, 1997, entitled “INFORMATION RECORDING METHOD AND APPARATUS” by H. Miyamoto et al, and assigned to the present assignee, based on Japanese Patent Application Nos. 08-136189 filed on May 30, 1996 and 09-079587 filed on Mar. 31, 1997, the subject matter of which is incorporated herein by reference.
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Dec 1997 |
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Continuations (3)
|
Number |
Date |
Country |
Parent |
09/350107 |
Jul 1999 |
US |
Child |
09/761570 |
|
US |
Parent |
09/090310 |
Jun 1998 |
US |
Child |
09/350107 |
|
US |
Parent |
08/900294 |
Jul 1997 |
US |
Child |
09/090310 |
|
US |