US6125101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase-change type optical recording medium having recording marks wider than a recording track
Assignee: TDK Corp
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Filing: 1999-07-14
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Granted: 2000-09-26
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Expires: 2019-07-14
Abstract
Abstract Deterioration of properties associated with high-density recording is suppressed in the recording of a phase change optical recording medium wherein a land or groove is used for the recording track. A method for recording an optical recording medium having a substrate having grooves formed thereon and a recording layer of phase change type on the substrate wherein a groove or a land between two adjacent grooves is used for the recording track is provided. In this method, the record marks are formed such that: M W /T W >1 when T W is width of the recording track, and M W is width of the record mark.
Inventors
- 👤 Takashi Kikukawa
- 👤 Hajime Utsunomiya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:04
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/2407; G11B7/24085; G11B7/004; G11B7/0045; G11B7/00454
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
110 words
A method for recording on an optical recording medium having a substrate having grooves formed therein and a recording layer of a phase change type on the substrate wherein a groove or a land between two adjacent grooves is used for the recording track, the record marks are formed such that: M W /T W >1 when T W is a width dimension of the recording track and M W is a width dimension of the record mark and wherein M W is set such that: M W ≦1.2 (G W +L W ) when G W is width of the groove, and L W is width of the land.
Claim 2
Independent Claim
110 words
A method for recording on an optical recording medium having a substrate having grooves formed therein and a recording layer of a phase change type on the substrate wherein a groove or a land between two adjacent grooves is used for the recording track, the record marks are formed such that: M W /T W >1 when T W is a width dimension of the recording track and M W is a width dimension of the record mark and wherein M W is set such that: M W ≦1.2 (G W +L W ) when G W is width of the groove, and L W is width of the land.
Claim 3
Dependent Claim
21 words
The optical recording method according to claim 1 wherein the record marks are formed such that: M W /T W ≧1.3
Claim 4
Dependent Claim
21 words
The optical recording method according to claim 1 wherein the record marks are formed such that: M W /T w ≧1.5
Claim 5
Independent Claim
102 words
A method for recording on an optical recording medium having a substrate having grooves formed therein and a recording layer of a phase change type on the substrate wherein a groove or a land between two adjacent grooves is used for the recording track, the record marks are formed such that: M W /T W >1 when T W is a width dimension of the recording track and M W is a width dimension of the record mark and wherein the record marks are formed such that: M W /M L ≧1 when M L is length of the shortest record mark.
Claim 6
Independent Claim
102 words
A method for recording on an optical recording medium having a substrate having grooves formed therein and a recording layer of a phase change type on the substrate wherein a groove or a land between two adjacent grooves is used for the recording track, the record marks are formed such that: M W /T W >1 when T W is a width dimension of the recording track and M W is a width dimension of the record mark and wherein the record marks are formed such that: M W /M L ≧1 when M L is length of the shortest record mark.
Claim 7
Dependent Claim
21 words
The optical recording method according to claim 4 wherein the record marks are formed such that: M W /M L ≦4.
Claim 8
Independent Claim
119 words
A method for recording on an optical recording medium having a substrate having grooves formed therein and a recording layer of a phase change type on the substrate wherein a groove or a land between two adjacent grooves is used for the recording track, the record marks are formed such that: M W /T W >1 when T W is a width dimension of the recording track and M W is a width dimension of the record mark and wherein the groove has a depth Gd such that: G d <λ/8n when G d is a depth of the groove, n is a refractive index of the substrate, and λ is a wavelength of the recording or reproducing beam.
Claim 9
Independent Claim
119 words
A method for recording on an optical recording medium having a substrate having grooves formed therein and a recording layer of a phase change type on the substrate wherein a groove or a land between two adjacent grooves is used for the recording track, the record marks are formed such that: M W /T W >1 when T W is a width dimension of the recording track and M W is a width dimension of the record mark and wherein the groove has a depth Gd such that: G d <λ/8n when G d is a depth of the groove, n is a refractive index of the substrate, and λ is a wavelength of the recording or reproducing beam.
Claim 10
Dependent Claim
25 words
The optical recording method according to claim 1 wherein, in said optical recording medium, the record marks are amorphous and the non-recorded area is crystalline.
Claim 11
Dependent Claim
21 words
The optical recording method according to claim 4, wherein the record marks are formed such that M W /T W ≧1.3.
Claim 12
Dependent Claim
21 words
The optical recording method according to claim 4, wherein the record marks are formed such that M W /T W ≧1.5.
Claim 13
Dependent Claim
25 words
The optical recording method according to claim 4, wherein, in said optical recording medium, the record marks are amorphous and the non-recorded area is crystalline.
Claim 14
Dependent Claim
21 words
The optical recording method according to claim 6 wherein the record marks are formed such that: M W /T W ≧1.3.
Claim 15
Dependent Claim
21 words
The optical recording method according to claim 6, wherein the record marks are formed such that M W /T W ≧1.5.
Claim 16
Dependent Claim
25 words
The optical recording method according to claim 6 wherein, in said optical recording medium, the record marks are amorphous and the non-recorded area is crystalline.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-09-26 | 2004-03-27 | 2004-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-09-26 | 2008-03-27 | 2008-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-09-26 | 2012-03-27 | 2012-09-26 | $7700.00 | Window Closed / Lapsed |