EP0023328A1
Expired / Lapsed
EP
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Metallic thin film magnetic recording medium
Assignee: Panasonic Holdings Corp
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Filing: 1980-07-18
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Granted: —
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Expires: 2000-07-18
Abstract
Abstract A magnetic thin film deposited on a non-magnetic substrate consists substantially of Ni, Co and oxygen, the content of Ni being between 10 and 55% by weight based on the weight of Ni and Co, the atomic percent ratio of oxygen to Ni and Co being between 3 and 45%.
Inventors
- 👤 Toshiaki Kunieda
- 👤 Masaru Odagiri
- 👤 Takashi Fujita
- 👤 Koichi Shinohara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 00:36
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/64; G11B5/65; G11B5/658; H; H01; H01F; H01F10/00; H01F10/08; H01F10/10; H01F10/12; H01F10/16; H01F41/00; H01F41/14; H01F41/20; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10S428/922; Y10S428/9265; Y10S428/928; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/1266; Y10T428/12771; Y10T428/12861; Y10T428/12931; Y10T428/12944; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A metallic thin film recording medium characterized in that a megnetic thin film deposited on a non-magnetic substrate consists of Ni, Co and oxygen.
Claim 2
Dependent Claim
24 words
A metallic thin film recording medium characterized in that a megnetic thin film deposited on a non-magnetic substrate consists of Ni, Co and oxygen.
Claim 3
Dependent Claim
32 words
A metallic thin film recording medium according to claim 1 characterized in that the content of nickel is between 10 and 55% by weight based on the weight of nickel and cobalt.
Claim 4
Dependent Claim
37 words
A metallic thin film recording medium according to claim 1 or 2 characterized in that the ratio of the oxygen atoms to the sum of nickel and cobalt atoms in atomic percent is between 3 and 45%.
References Cited (Backward Citations)
FR2075229A5
Cited
DE2435887A1
Cited
GB1498631A
Cited
FR2358722A1
Cited
FR2376485A1
Cited
JPS5419199A
Cited
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