Patent US5397320A successfully refreshed from Google Patents.
US4904577A
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Optical recording element and alloy for use therein
Assignee: Eastman Kodak Co
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Filing: 1988-11-21
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Granted: 1990-02-27
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Expires: 2008-11-21
Abstract
Abstract There is disclosed an antimony, tin and indium alloy which contains an additional element. The additional element is selected from the group consisting of titanium, aluminum, magnesium, manganese, silver, bismuth, germanium, lead, tellurium, gold, zinc, copper, palladium, nickel, iron, cobalt, and cadmium. The additional element substantially reduces arcing during the sputtering process used to make optical recording layers from the alloy.
Inventors
- 👤 Yuan-Sheng Tyan
- 👤 Pranab K. Raychaudhuri
- 👤 Fridrich Vazan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
C; C22; C22C; C22C12/00; G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/243; G11B2007/24302; G11B2007/24304; G11B2007/24306; G11B2007/24308; G11B2007/2431; G11B2007/24312; G11B2007/24314; G11B2007/24316
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
In an alloy of antimony, tin and indium for use in optical recording, the improvement wherein said alloy includes at least one additional element selected from the group consisting of titanium, aluminum, magnesium, manganese, silver, bismuth, germanium, lead, tellurium, gold, zinc, copper, palladium, nickel, iron, cobalt, and cadmium, said additinal element being present in an amount sufficient to reduce arcing during sputtering of said alloy.
Claim 2
Dependent Claim
65 words
In an alloy of antimony, tin and indium for use in optical recording, the improvement wherein said alloy includes at least one additional element selected from the group consisting of titanium, aluminum, magnesium, manganese, silver, bismuth, germanium, lead, tellurium, gold, zinc, copper, palladium, nickel, iron, cobalt, and cadmium, said additinal element being present in an amount sufficient to reduce arcing during sputtering of said alloy.
Claim 3
Dependent Claim
18 words
An alloy according to claim 1 wherein said additional element is present in an amount less than 5%.
Claim 4
Dependent Claim
23 words
An alloy according to claim 1 wherein said additional element is selected from the group consisting of aluminum, magnesium, manganese, silver and bismuth.
Claim 5
Dependent Claim
74 words
In an optical recording element comprising a support having therein an optical recording layer comprising an alloy of antimony, tin and indium, the improvement wherein said alloy includes at least one additional element selected from the group consisting of titanium, aluminum, magnesium, manganese, silver, bismuth, germanium, lead, tellurium, gold, zinc, copper, palladium, nickel, iron, cobalt, and cadmium, said additional element being present in an amount sufficient to reduce arcing during sputtering of said alloy.
Claim 6
Dependent Claim
74 words
In an optical recording element comprising a support having therein an optical recording layer comprising an alloy of antimony, tin and indium, the improvement wherein said alloy includes at least one additional element selected from the group consisting of titanium, aluminum, magnesium, manganese, silver, bismuth, germanium, lead, tellurium, gold, zinc, copper, palladium, nickel, iron, cobalt, and cadmium, said additional element being present in an amount sufficient to reduce arcing during sputtering of said alloy.
Claim 7
Dependent Claim
34 words
An optical recording element according to claim 4 comprising, in order, (i) a substrate, (ii) a surface smoothing layer, (iii) a reflecting layer, (iv) said optical recording layer, and (v) a protective overcoat layer.
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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) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |