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US 4,902,585 AGranted
Recording medium and method of producing the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazufumi Ogawa, Hideharu Tamura
Life of this patent
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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.sub.3 --(CF.sub.2)m--(CH.sub.2)n--SiCl.sub.3 (m, n: integer) and the agent is polymerized with the recording layer. The recording medium may provide high density recording performance.
Claims12
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.sub.3 --(CF.sub.2)m--(CH.sub.2)n--SiCl.sub.3 (m, n:
- integer) is used as said silane surface active agent.
2 more elements
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.
1 more element
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.
1 more element
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.
1 more element
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.sub.3 --(CF.sub.2).sub.m --(CH.sub.2).sub.n --SiCl.sub.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.
3 more elements
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.
Dependencies are inferred from the claim text.