Patent US4074016A successfully refreshed from Google Patents.
US4074016A
Expired / Lapsed
US
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Magnetic record carrier
Assignee: International Business Machines Corp
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Filing: 1976-12-09
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Granted: 1978-02-14
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Expires: 1996-12-09
Abstract
Abstract A record carrier for a magnetic thin film metal layer includes a substrate coated with a pigmented epoxy resin as a synthetic substance layer. The pigment includes approximately 20% titanium dioxide and approximately 2% aluminum oxide. A thin getter metal layer is deposited over the synthetic substance layer for absorbing the outgasing from the synthetic substance layer. A relatively thicker metal layer such as chromium is then deposited over the getter layer for enhancing the magnetic properties of the subsequently deposited magnetic layer.
Inventors
- 👤 Gerhard Trippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/73; G11B5/7368; G11B5/7369; G11B5/733; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/923; Y10S428/924; Y10S428/926; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12611; Y10T428/12618; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
54 words
A multi-layer magnetic record carrier, comprising: a substrate; a synthetic substance layer deposited onto said substrate; a layer of getter metal vacuum deposited onto said synthetic substance layer; and a layer of an undercoat metal vacuum deposited onto said getter metal layer, said undercoat metal layer being substantially thicker than said getter metal layer.
Claim 2
Dependent Claim
54 words
A multi-layer magnetic record carrier, comprising: a substrate; a synthetic substance layer deposited onto said substrate; a layer of getter metal vacuum deposited onto said synthetic substance layer; and a layer of an undercoat metal vacuum deposited onto said getter metal layer, said undercoat metal layer being substantially thicker than said getter metal layer.
Claim 3
Dependent Claim
23 words
A multi-layer magnetic record carrier as defined in claim 1 wherein said synthetic substance layer is pigmented with at least one metal oxide.
Claim 4
Dependent Claim
31 words
A multi-layer magnetic record carrier as defined in claim 2 wherein said layer of getter metal consists of a metal the oxide of which serves to pigment said synthetic substance layer.
Claim 5
Dependent Claim
21 words
A multi-layer magnetic record carrier as defined in claim 1 wherein said synthetic substance layer consists of a pigmented epoxy resin.
Claim 6
Dependent Claim
23 words
A multi-layer magnetic record carrier as defined in claim 4 wherein said pigmented epoxy resin is pigmented with titanium oxide and aluminum oxide.
Claim 7
Dependent Claim
19 words
A multi-layer magnetic record carrier as defined in claim 5 wherein said layer of getter metal consists of titanium.
Claim 8
Dependent Claim
16 words
A multi-layer magnetic record carrier as defined in claim 1 wherein said undercoat metal is chromium.
Claim 9
Dependent Claim
40 words
A multi-layer magnetic record as defined in claim 1 wherein said synthetic substance layer is a thickness of approximately 12500 Angstroms, said getter metal layer is approximately 250 Angstroms thick, and said undercoat metal layer is approximately 5000 Angstroms thick.
Claim 10
Dependent Claim
23 words
A multi-layer magnetic record carrier as defined in claim 1 wherein said synthetic substance layer is pigmented with titanium oxide and aluminum oxide.
Claim 11
Dependent Claim
22 words
A multi-layer magnetic record carrier as defined in claim 9 wherein said getter metal layer consists of approximately 250 Angstroms of titanium.
Claim 12
Dependent Claim
30 words
A multi-layer magnetic record carrier as defined in claim 9 wherein said synthetic substance layer is an epoxy resin pigmented with approximately 20% titanium dioxide and approximately 2% aluminum oxide.
Claim 13
Dependent Claim
82 words
A multi-layer, magnetic record carrier for a ferromagnetic recording layer comprising: a substantially rigid substrate; a synthetic substance layer pigmented with titanium oxide and aluminum oxide deposited onto said substrate; a thin layer of titanium vacuum deposited as a getter metal onto said synthetic substance layer such that the titanium layer prevents outgassing from said synthetic substance layer; and a layer of an undercoat metal vacuum deposited onto said titanium layer, said undercoat metal layer being substantially thicker than said titanium layer.
Claim 14
Dependent Claim
82 words
A multi-layer, magnetic record carrier for a ferromagnetic recording layer comprising: a substantially rigid substrate; a synthetic substance layer pigmented with titanium oxide and aluminum oxide deposited onto said substrate; a thin layer of titanium vacuum deposited as a getter metal onto said synthetic substance layer such that the titanium layer prevents outgassing from said synthetic substance layer; and a layer of an undercoat metal vacuum deposited onto said titanium layer, said undercoat metal layer being substantially thicker than said titanium layer.
Claim 15
Dependent Claim
28 words
A multi-layer magnetic record carrier as defined in claim 12 wherein said synthetic substance layer is an epoxy resin pigmented with 20% titanium oxide and 2% aluminum oxide.
Claim 16
Dependent Claim
41 words
A multi-layer magnetic record carrier as defined in claim 12 wherein said synthetic substance layer is a thickness of approximately 12,500 Angstroms, said getter metal layer is approximately 250 Angstroms thick, and said undercoat metal layer is approximately 5000 Angstroms thick.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |