US4761316A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording medium and method of producing the same
Assignee: Panasonic Holdings Corp
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Filing: 1985-11-18
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Granted: 1988-08-02
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Expires: 2005-11-18
Abstract
Abstract A recording medium which comprises a base body, a recording layer formed on the base body, and a protection layer formed on the recording layer for protecting the recording layer. The protection layer is made from silane surface active agent and the agent is polymerized and bonded to the recording layer. The recording medium provides high density recording performance.
Inventors
- 👤 Kazufumi Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:45
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/72; B; B05; B05D; B05D1/00; B05D1/18; B05D1/185; B82; B82Y; B82Y10/00; B82Y30/00; B82Y40/00; Y; Y10; Y10S; Y10S428/00; Y10S428/90; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
74 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent of the formula CH 2 ═CH--(CH 2 ) n --C.tbd.C--C.tbd.C--(CH 2 ) m --SiCl 3 (n and m are integers) chemically bonded to said recording layer.
Claim 2
Dependent Claim
74 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent of the formula CH 2 ═CH--(CH 2 ) n --C.tbd.C--C.tbd.C--(CH 2 ) m --SiCl 3 (n and m are integers) chemically bonded to said recording layer.
Claim 3
Dependent Claim
13 words
The recording medium of claim 1 wherein, said base body is optically transparent.
Claim 4
Dependent Claim
24 words
The recording medium of claim 1, wherein vinyl groups of said silane surface active agent are bridged to one another by energy beam-irradiation thereto.
Claim 5
Dependent Claim
24 words
The recording medium of claim 1, wherein fluorine is added to vinyl groups of said silane active agent by processing in plasma including fluorine.
Claim 6
Dependent Claim
21 words
The recording medium of claim 1, wherein said recording medium is a magnetic recording medium, optical recording medium or recording disc.
Claim 7
Dependent Claim
21 words
The recording medium of claim 1, wherein said recording and protection layers are formed on both surfaces of said base body.
Claim 8
Dependent Claim
96 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent chemically bonded to said recording layer, said silane surface active agent being a compound of the formula CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) having hydroxy groups added to vinyl groups of said silane surface active agent by use of diborane and alkaline hydrogen peroxide.
Claim 9
Dependent Claim
96 words
A recording medium comprising: a base body; at least one recording layer formed on said base body; and at least one protection layer formed on said recording layer for protecting said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent chemically bonded to said recording layer, said silane surface active agent being a compound of the formula CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) having hydroxy groups added to vinyl groups of said silane surface active agent by use of diborane and alkaline hydrogen peroxide.
Claim 10
Dependent Claim
21 words
The recording medium of claim 7, wherein said recording and protection layers are formed on both surfaces of said base body.
Claim 11
Dependent Claim
13 words
The recording medium of claim 7, wherein said base body is optically transparent.
Claim 12
Dependent Claim
21 words
The recording medium of claim 7, wherein said recording medium is a magnetic recording medium, optical recording medium or recording disc.
Claim 13
Independent Claim
111 words
A method of producing a recording medium comprising the steps of: forming a recording layer on a base body for said recording medium; forming a protection layer on said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent of the formula CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) chemically bonded to said recording layer by use of a chemical adsorption technique; immersing the resultant product into diborane and alkaline hydrogen peroxide so that hydroxy groups are added to vinyl groups of the silane surface active agent; and conducting chemical adsorption of additional silane surface active agent onto the hydroxy groups.
Claim 14
Independent Claim
111 words
A method of producing a recording medium comprising the steps of: forming a recording layer on a base body for said recording medium; forming a protection layer on said recording layer, said protection layer being at least one monomolecular layer of polymerized silane surface active agent of the formula CH 2 ═CH--(CH 2 ) n --SiCl 3 (n: integer) chemically bonded to said recording layer by use of a chemical adsorption technique; immersing the resultant product into diborane and alkaline hydrogen peroxide so that hydroxy groups are added to vinyl groups of the silane surface active agent; and conducting chemical adsorption of additional silane surface active agent onto the hydroxy groups.
Claim 15
Dependent Claim
20 words
The method of claim 11, wherein chemical vinyl groups of said silane surface active agent are bridged to one another.
Claim 16
Dependent Claim
20 words
The method of claim 11, wherein said silane surface active agent is processed in a plasma atmosphere including fluorine gas.
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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) | 1991-08-02 | 1992-02-01 | 1992-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-02 | 1996-02-01 | 1996-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-02 | 2000-02-01 | 2000-08-02 | $7700.00 | Window Closed / Lapsed |