US4902585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recording medium and method of producing the same
Assignee: Panasonic Holdings Corp
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Filing: 1988-02-23
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Granted: 1990-02-20
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Expires: 2008-02-23
Abstract
Abstract Disclosed is a recording medium which comprises a base body of the recording medium, a recording layer formed on the base body, and a protective layer formed on the recording layer for protecting the recording layer. The protection layer is made from a silane surface active agent containing fluorine atoms (e.g., CF 3 --(CF 2 )m--(CH 2 )n--SiCl 3 (m, n: integer) and the agent is polymerized with the recording layer. The recording medium may provide high density recording performance.
Inventors
- 👤 Kazufumi Ogawa
- 👤 Hideharu Tamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:53
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/72; B; B82; B82Y; B82Y30/00; B05; B05D; B05D1/00; B05D1/18; B05D1/185; B82Y10/00; B82Y40/00; G11B5/64; G11B5/725; G11B5/7253; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
84 words
A recording medium comprising: a base body for said recording medium; at least one recording layer formed on said base body; and at least one protective layer formed on said recording layer for protecting said recording layer, said protective layer being made from a silane surface active agent containing fluorine atoms by chemical adsorption in non-aqueous solvent containing said silane surface active agent and wherein CF 3 --(CF 2 )m--(CH 2 )n--SiCl 3 (m, n: integer) is used as said silane surface active agent.
Claim 2
Dependent Claim
84 words
A recording medium comprising: a base body for said recording medium; at least one recording layer formed on said base body; and at least one protective layer formed on said recording layer for protecting said recording layer, said protective layer being made from a silane surface active agent containing fluorine atoms by chemical adsorption in non-aqueous solvent containing said silane surface active agent and wherein CF 3 --(CF 2 )m--(CH 2 )n--SiCl 3 (m, n: integer) is used as said silane surface active agent.
Claim 3
Dependent Claim
102 words
A recording medium comprising: a base body for said recording medium; at least one recording layer formed on said base body; and at least one protective layer formed on said recording layer for protecting said recording layer, said protective layer being a monomolecular polymer film or monomolecular cumulative polymer film made from repeating ##STR2## wherein m and n are integers of about 5 to 15 and wherein the said recording layer is bonded to the silicon atoms of said units through an oxygen atom thereof and said silicon atoms of said units are connected to each other through the oxygen atoms thereof.
Claim 4
Dependent Claim
102 words
A recording medium comprising: a base body for said recording medium; at least one recording layer formed on said base body; and at least one protective layer formed on said recording layer for protecting said recording layer, said protective layer being a monomolecular polymer film or monomolecular cumulative polymer film made from repeating ##STR2## wherein m and n are integers of about 5 to 15 and wherein the said recording layer is bonded to the silicon atoms of said units through an oxygen atom thereof and said silicon atoms of said units are connected to each other through the oxygen atoms thereof.
Claim 5
Dependent Claim
93 words
A recording medium comprising: a base body of said recording medium; at least one recording layer containing oxygen atoms thereon formed on said body; and at least one protection layer formed on said recording layer as a lubricant for protecting said recording layer, said protection layer being made from a mono-molecular film or mono-molecular cumulative film containing carbon chains with hydrogen and fluorine atoms, which chains are attached to a backbone of ##STR3## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof.
Claim 6
Dependent Claim
93 words
A recording medium comprising: a base body of said recording medium; at least one recording layer containing oxygen atoms thereon formed on said body; and at least one protection layer formed on said recording layer as a lubricant for protecting said recording layer, said protection layer being made from a mono-molecular film or mono-molecular cumulative film containing carbon chains with hydrogen and fluorine atoms, which chains are attached to a backbone of ##STR3## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof.
Claim 7
Dependent Claim
117 words
A recording medium comprising: a base body of said recording medium; at least one recording layer containing oxygen atoms thereon formed on said body; and at least one protection layer formed on said recording layer as a lubricant for protecting said recording layer, said protection layer being made from a mono-molecular film containing carbon chains with hydrogen and fluorine atoms which chains are attached to a backbone of ##STR4## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof by a chemical adsorption technique which comprises contacting said recording layer with a silane surface active agent containing fluorine atoms, which agent is dissolved in a nonaqueous solvent.
Claim 8
Dependent Claim
117 words
A recording medium comprising: a base body of said recording medium; at least one recording layer containing oxygen atoms thereon formed on said body; and at least one protection layer formed on said recording layer as a lubricant for protecting said recording layer, said protection layer being made from a mono-molecular film containing carbon chains with hydrogen and fluorine atoms which chains are attached to a backbone of ##STR4## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof by a chemical adsorption technique which comprises contacting said recording layer with a silane surface active agent containing fluorine atoms, which agent is dissolved in a nonaqueous solvent.
Claim 9
Dependent Claim
21 words
The recording medium of claim 4, wherein said recording and protection layers are formed on both surfaces of said base body.
Claim 10
Dependent Claim
19 words
The recording medium of claim 4, wherein said base body is made by a material which is optically transparent.
Claim 11
Dependent Claim
20 words
The recording medium of claim 4, wherein said recording medium is magnetic recording medium, optical recording medium or recording disc.
Claim 12
Dependent Claim
100 words
A recording medium comprising: a base body of said recording medium; 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 as a lubricant, said protection layer being made from a silane of the formula: CF 3 --(CF 2 ) m --(CH 2 ) n --SiCl 3 (m, n: integer) and said silane reacting with said recording layer to form a backbone of ##STR5## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof.
Claim 13
Dependent Claim
100 words
A recording medium comprising: a base body of said recording medium; 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 as a lubricant, said protection layer being made from a silane of the formula: CF 3 --(CF 2 ) m --(CH 2 ) n --SiCl 3 (m, n: integer) and said silane reacting with said recording layer to form a backbone of ##STR5## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof.
Claim 14
Dependent Claim
15 words
The recording medium of claim 8 wherein m and n are about 5 to 15.
Claim 15
Independent Claim
102 words
A method of producing a recording medium comprising the steps of: forming a recording layer containing oxygen on a base body of said recording medium; and forming a protection layer on said recording layer, said protection layer being made from a silane surface active agent containing carbon chains with hydrogen and fluorine atoms, and said silane reacting with oxygen in said recording layer to form a backbone of ##STR6## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof, said silane being applied to said recording layer by a chemical absorption technique.
Claim 16
Independent Claim
102 words
A method of producing a recording medium comprising the steps of: forming a recording layer containing oxygen on a base body of said recording medium; and forming a protection layer on said recording layer, said protection layer being made from a silane surface active agent containing carbon chains with hydrogen and fluorine atoms, and said silane reacting with oxygen in said recording layer to form a backbone of ##STR6## (n: integer) bond, and said backbone being bonded directly or indirectly to said recording layer through the --O-- bonds thereof, said silane being applied to said recording layer by a chemical absorption technique.
Claim 17
Dependent Claim
31 words
The method of claim 10, wherein a chemical substance of the formula CF 3 --(CF 2 )m--(CH 2 )n--SiCl 3 (m, n: integer) is used as said silane surface active agent.
Claim 18
Dependent Claim
14 words
The method of claim 11 wherein m and n are about 5 to 15.
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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) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |