Method of producing magnetic recording medium
Patent 4260466 Issued on April 7, 1981. Estimated Expiration Date: 
April 7, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 7, 1998. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3278441 3690932 3713869 InventorsAssigneeApplicationNo. 05/771583 filed on 02/24/1977US Classes:204/192.2, Ferromagnetic204/192.11, Ion beam sputter deposition204/192.14, Coating inorganic material onto polymeric material204/192.15, Specified deposition material or use427/132, Metal coating427/296, Organic base427/302, Resin, rubber, or hardenable oil containing coating427/488, Plasma initiated polymerization427/502, Magnetic recording medium formed427/519, Keto or aldehyde containing group is part of the rate affecting coating material (e.g., benzoin, benzophenone, acetaldehyde, etc.)427/525, Organic material present in substrate, plating, or implanted layer427/527, Silicon present in substrate, plating, or implanted layer427/531, Metal or metal alloy plating or implanted material428/473.5, Of polyimide428/836.1, Metal or alloy magnetic layer428/900MAGNETIC FEATUREExaminersPrimary: Pianalto, BernardAttorney, Agent or FirmInternational ClassesC23C 14/06 (20060101)G11B 5/84 (20060101) G11B 5/851 (20060101) Foreign Application Priority Data1974-03-13 JPAbstractA method of producing a magnetic recording layer on a support comprising simultaneously depositing a ferromagnetic material and a polymer on a support using a vapor deposition technique such as vacuum deposition, sputtering, etc., thereby to produce thereon a magnetic recording layer of a composite film of the ferromagnetic material and the polymer. A further embodiment for producing a magnetic recording layer comprises simultaneously depositing a ferromagnetic material and a monomer or oligomer on the support using a vapor deposition technique, polymerizing the deposited layer, e.g., using a polymerization catalyst or by applying ionizing or electromagnetic rays thereto, to form a composite film of the ferromagnetic material and the polymer. The magnetic recording layer thus obtained in either embodiment can be used for high density recording. |
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