Patent US5228024A successfully refreshed from Google Patents.
US5228024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magneto-optical disk possessing enhanced anti-reflective and anti-oxidative properties
Assignee: LG Electronics Inc
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Filing: 1991-05-17
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Granted: 1993-07-13
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Expires: 2011-05-17
Abstract
Abstract A magneto-optical disk comprising a polycarbonate substrate, a first protective coating coated on the polycarbonate substrate, a recording layer coated on the first protective coating, a second protective coating coated on the recording layer, a reflective layer coated on the second protective coating, wherein the first and second protective coatings comprises at least one multiple layer of SiNx/TiO 2 /SiNx layer or a coating of an amorphous AsxS 1 -x layer. The present invention can provide a magneto-optical disk of a good anti-reflection effect as a result of considerable increase of the θk value, and a good stability against the oxidation.
Inventors
- 👤 Hyuk Moon
- 👤 Ki C. Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:13
CPC Classifications
G; G11; G11B; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
61 words
A magneto-optical disk comprising a polycarbonate substrate, a first protective coating coated on the polycarbonate substrate, a recording layer coated on the first protective coating, a second protective coating coated on the recording layer, a reflective layer coated on the second protective coating, wherein said first and second protective coatings each comprising: a coating of an amorphous AsxS 1 -x layer.
Claim 2
Dependent Claim
61 words
A magneto-optical disk comprising a polycarbonate substrate, a first protective coating coated on the polycarbonate substrate, a recording layer coated on the first protective coating, a second protective coating coated on the recording layer, a reflective layer coated on the second protective coating, wherein said first and second protective coatings each comprising: a coating of an amorphous AsxS 1 -x layer.
Claim 3
Dependent Claim
26 words
A magneto-optical disk according to claim 1, wherein, in said amorphous AsxS 1 -x layer, the constant x is weight % ranging from 20 to 50.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-07-12 | 1997-01-11 | 1997-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-07-12 | 2001-01-11 | 2001-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-07-12 | 2005-01-11 | 2005-07-13 | $7700.00 | Window Closed / Lapsed |