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Title:
MAGNETIC RECORDING MEDIUM
Document Type and Number:
Japanese Patent JPS63304424
Kind Code:
A
Abstract:

PURPOSE: To form protective films to a smaller thickness by providing the 1st protective film which is formed on a magnetic film and consists of Ni-P contg. 6W20wt.% tungsten and the 2nd protective film which is formed on said 1st protective film and consists of SiO2 to this recording medium.

CONSTITUTION: This magnetic recording medium has the protective films constituted by forming the Ni-P film contg. 6W20wt.% tungsten on the magnetic film and forming the SiO2 further thereon. For example, the Ni-W-P film contg. the tungsten exhibits excellent weatherability and is the dense film which is thin (100W200) and has less pinholes. Deterioration in the weatherability is, therefore, obviated by the effect of the Ni-P film even if the thickness of the thin SiO2 is reduced. This magnetic recording medium has the protective films constituted by forming the Ni-P coating on the magnetic layer and forming the SiO2 further thereon in such a manner. The excellent weatherability is thereby obtd. and the formation of the protective films to the smaller thickness is enabled.


Inventors:
NISHIKAWA MASAO
Application Number:
JP14082587A
Publication Date:
December 12, 1988
Filing Date:
June 04, 1987
Export Citation:
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Assignee:
NEC CORP
International Classes:
G11B5/66; G11B5/64; G11B5/72; G11B5/73; G11B5/738; G11B5/82; G11B5/84; (IPC1-7): G11B5/66; G11B5/72; G11B5/82
Attorney, Agent or Firm:
Uchihara Shin



 
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