Patent US4988573A successfully refreshed from Google Patents.
US4988573A
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US
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Medium related members
Assignee: TDK Corp
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Filing: 1989-07-13
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Granted: 1991-01-29
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Expires: 2009-07-13
Abstract
Abstract A plasma-polymerized film covers a surface of a medium related member which constructs or is disposed in a casing in which a tape or disk-shaped recording medium is receiving for travel or rotating motion. The film contains C, F and at least one element of Si, B, P and N. The total content of F and at least one element of Si, B, P, and N ranges from 5 to 40 atom % of the film, and the atomic ratio of (Si+B+P+N)/F ranges from 2/10 to 5/1.
Inventors
- 👤 Masatoshi Nakayama
- 👤 Kunihiro Ueda
- 👤 Masatoshi Okamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:32
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/02; G11B23/04; G11B23/08; G11B23/087; G11B23/08707; G11B23/08785; C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; G11B23/08757; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31652; Y10T428/31663; Y10T428/31678; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
106 words
A recording and/or reproducing medium related member which constructs or is disposed in a casing in which a tape or disk-shaped medium is received for travel or rotating motion and is in sliding contact with said tape or disk-shaped medium, wherein a plasma-polymerized film is formed on a surface of said member wherein said film contains C, F and at least one element of Si, B, P, and N, the total content of F and at least one element of Si, B, P, and N ranging from 5 to 40 atom % of the film, and the atomic ratio of (Si+B+P+N)/F ranging from 2/10 to 5/1.
Claim 2
Dependent Claim
106 words
A recording and/or reproducing medium related member which constructs or is disposed in a casing in which a tape or disk-shaped medium is received for travel or rotating motion and is in sliding contact with said tape or disk-shaped medium, wherein a plasma-polymerized film is formed on a surface of said member wherein said film contains C, F and at least one element of Si, B, P, and N, the total content of F and at least one element of Si, B, P, and N ranging from 5 to 40 atom % of the film, and the atomic ratio of (Si+B+P+N)/F ranging from 2/10 to 5/1.
Claim 3
Dependent Claim
24 words
The medium related member of claim 1 wherein said plasma-polymerized film further contains H with an atomic ratio of C/H of up to 2/1.
References Cited (Backward Citations)
JPS58222114A
Cited
JPS58222115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-01-28 | 1994-07-30 | 1995-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-01-28 | 1998-07-30 | 1999-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-01-28 | 2002-07-30 | 2003-01-29 | $7700.00 | Window Closed / Lapsed |