US5075145A
Expired / Lapsed
US
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Optical recording medium
Assignee: Fujifilm Holdings Corp
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Filing: 1990-04-02
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Granted: 1991-12-24
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Expires: 2010-04-02
Abstract
Abstract An optical recording medium comprising a substrate and a metal reflective layer provided on the substrate, in which the metal reflective layer comprises an alloy of Al and at least one metal selected from the elements of Groups Ib, IIa, IVb, Vb, VIb, IIIa, IVa and Va of the Periodic Table.
Inventors
- 👤 Ryoichi Yamamoto
- 👤 Takashi Yamada
- 👤 Satoshi Matsubaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:17
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/252; G11B7/258; G11B7/2585; Y; Y10; Y10S; Y10S428/00; Y10S428/913; Y10S430/00; Y10S430/146; Y10S430/165; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
53 words
An optical recording medium comprising a substrate and an anti-corrosion metal reflective layer, wherein the metal reflective layer comprises an alloy of aluminum and 0.3 to 20 atom % of at least one metal selected from the elements of Groups Ib, IIb, IVb, Vb, VIb, IIIa, IVa and Va of the Periodic Table.
Claim 2
Dependent Claim
53 words
An optical recording medium comprising a substrate and an anti-corrosion metal reflective layer, wherein the metal reflective layer comprises an alloy of aluminum and 0.3 to 20 atom % of at least one metal selected from the elements of Groups Ib, IIb, IVb, Vb, VIb, IIIa, IVa and Va of the Periodic Table.
Claim 3
Dependent Claim
49 words
The optical recording medium as claimed in claim 1, wherein the metal reflective layer comprises an alloy of Al and at least one metal selected from the group consisting of Nb, Zr, V, Mo, Hf, W and Au, the proportion of said metal being 0.5 to 20 atom %.
Claim 4
Dependent Claim
49 words
The optical recording medium as claimed in claim 1, wherein the metal reflective layer comprises an alloy of Al and at least one metal selected from the group consisting of Zn, In, Si, Pb, P, Sb and Bi, the proportion of said metal being 0.3 to 15 atom %.
Claim 5
Dependent Claim
22 words
The optical recording medium as claimed in claim 1, wherein an organic resin protective layer is provided on the metal reflective layer.
Claim 6
Dependent Claim
22 words
The optical recording medium as claimed in claim 1, wherein the metal reflective layer has a thickness of 200 to 2,000 Å.
Claim 7
Dependent Claim
32 words
An optical recording medium as described in claim 1, wherein the aluminum in said alloy is replaced by a metal selected from the group consisting of iron, copper, nickel, titanium and chromium.
Claim 8
Dependent Claim
108 words
A double-side recording type optical recording medium comprising two optical recording media bonded together with a hot melt adhesive, wherein each of said optical recording media includes a substrate, a corrosion resistant metal reflective layer and an organic resin protective layer and the protective layers of said media are bonded together so that the substrates form the outermost layers of the double-side recording type optical recording medium, each said corrosion resistant metal reflective layer comprising an alloy of aluminum and 0.3 to 20 atom % of at least one metal selected from the elements of Groups Ib, IIb, IVb, Vb, IIIa, IVa and Va of the Periodic Table.
Claim 9
Dependent Claim
108 words
A double-side recording type optical recording medium comprising two optical recording media bonded together with a hot melt adhesive, wherein each of said optical recording media includes a substrate, a corrosion resistant metal reflective layer and an organic resin protective layer and the protective layers of said media are bonded together so that the substrates form the outermost layers of the double-side recording type optical recording medium, each said corrosion resistant metal reflective layer comprising an alloy of aluminum and 0.3 to 20 atom % of at least one metal selected from the elements of Groups Ib, IIb, IVb, Vb, IIIa, IVa and Va of the Periodic Table.
Claim 10
Dependent Claim
51 words
The double-side-recording type optical recording medium as claimed in claim 7, wherein the metal reflective layer comprises an alloy of Al and at least one metal selected from the group consisting of Nb, Zr, V, Mo, Hf, W and Au, the proportion of said metal being 0.5 to 20 atom %.
Claim 11
Dependent Claim
51 words
The double-side-recording type optical recording medium as claimed in claim 7, wherein the metal reflective layer comprises an alloy of Al and at least one metal selected from the group consisting of Zn, In, Si, Pb, P, Sb and Bi, the proportion of said metal being 0.3 to 15 atom %.
Claim 12
Dependent Claim
33 words
The double-side-recording type optical recording medium as claimed in claim 7, wherein the hot melt adhesive is at least one resin selected from the group consisting of synthetic rubber-based, EVA-based, acryl-based, and polyamide-based.
Claim 13
Dependent Claim
24 words
The double-side-recording type optical recording medium as claimed in claim 7, wherein the metal reflective layer has a thickness of 200 to 2,000 Å.
Claim 14
Dependent Claim
35 words
A double-side recording type optical recording medium as described in claim 7, wherein the aluminum in said alloy is replaced by a metal selected from the group consisting of iron, copper, nickel, titanium and chromium.
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) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |