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US4717628A
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US
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Magnetooptical storage element
Assignee: Sharp Corp
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Filing: 1986-02-19
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Granted: 1988-01-05
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Expires: 2006-02-19
Abstract
Abstract A magnetooptical storage element having a recording layer of a multi-layer construction including a reflective layer. The reflective layer is made of an aluminium-nickel alloy obtained by adding nickel to aluminium such that the aluminium-nickel alloy contains approximately 2 to 10 atomic percent of nickel.
Inventors
- 👤 Akira Takahashi
- 👤 Yoshiteru Murakami
- 👤 Hiroyuki Katayama
- 👤 Junji Hirokane
- 👤 Kenji Ohta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:56
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586; G11B11/10589; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
29 words
A magnetooptical storage element having a multi-layer construction including a reflective layer, wherein said reflective layer comprises an aluminium-nickel alloy containing approximately 2 to 10 atomic percent of nickel.
Claim 2
Dependent Claim
29 words
A magnetooptical storage element having a multi-layer construction including a reflective layer, wherein said reflective layer comprises an aluminium-nickel alloy containing approximately 2 to 10 atomic percent of nickel.
Claim 3
Dependent Claim
35 words
A magnetooptical storage element having a multi-layer construction including a reflective layer, wherein said reflective layer comprises an aluminium-nickel alloy containing an effective amount of nickel for lowering the coefficient of thermal conductivity of aluminum.
Claim 4
Dependent Claim
35 words
A magnetooptical storage element having a multi-layer construction including a reflective layer, wherein said reflective layer comprises an aluminium-nickel alloy containing an effective amount of nickel for lowering the coefficient of thermal conductivity of aluminum.
Claim 5
Dependent Claim
22 words
A magnetooptical storage element as claimed in claim 2, wherein said aluminium-nickel alloy contains approximately 2 to 10 atomic percent of nickel.
Claim 6
Dependent Claim
49 words
A magnetooptical storage element comprising a transparent substrate and a recording element of multilayer construction disposed on said substrate wherein said recording element includes a reflective layer made of an alloy containing aluminum and an effective amount of an element for lowering the coefficient of thermal conductivity of aluminum.
Claim 7
Dependent Claim
49 words
A magnetooptical storage element comprising a transparent substrate and a recording element of multilayer construction disposed on said substrate wherein said recording element includes a reflective layer made of an alloy containing aluminum and an effective amount of an element for lowering the coefficient of thermal conductivity of aluminum.
Claim 8
Dependent Claim
21 words
A magnetooptical storage element as claimed in claim 4, wherein said element is one of nickel, palladium, platinum, chromium and molybdenum.
Claim 9
Dependent Claim
26 words
A magnetooptical storage element as claimed in claim 4, wherein said element is nickel and said alloy contains approximately 2 to 10 atomic percent of nickel.
Claim 10
Dependent Claim
26 words
The magnetooptical storage element as claimed in claim 4 wherein said reflective layer comprises an aluminum-nickel alloy containing approximately 2 to 10 atomic percent of nickel.
Claim 11
Dependent Claim
32 words
The magnetooptical storage element as claimed in claim 4, wherein said reflective layer comprises an aluminum-nickel alloy containing an effective amount of nickel for lowering the coefficient of thermal conductivity of aluminum.
Claim 12
Dependent Claim
58 words
The magnetooptical storage element as claimed in claim 4, wherein said recording element includes a first transparent dielectric film, an amorphous alloy film containing rare earth transition metals disposed on said first transparent dielectric film, a second transparent dielectric film disposed on said amorphous alloy film and said reflective layer is disposed on said second transparent dielectric film.
Claim 13
Dependent Claim
37 words
A magnetooptical storage element having a multi-layer construction including a reflective layer, wherein said reflective layer comprises an alloy containing aluminum and an effective amount of an element for lowering the coefficient of thermal conductivity of aluminum.
Claim 14
Dependent Claim
37 words
A magnetooptical storage element having a multi-layer construction including a reflective layer, wherein said reflective layer comprises an alloy containing aluminum and an effective amount of an element for lowering the coefficient of thermal conductivity of aluminum.
Claim 15
Dependent Claim
21 words
A magnetooptical storage element as claimed in claim 10, wherein said element is one of nickel, palladium, platinum, chromium and molybdenum.
Claim 16
Dependent Claim
26 words
A magnetoooptical storage element as claimed in claim 11, wherein said element is nickel and said alloy contains approximately 2 to 10 atomic percent of nickel.
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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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |