Back to results
US 4,411,963 AGranted
Thin film recording and method of making
OwnerHarry E. Aineinventor
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
OwnerHarry E. Aineinventor
Estimating the term…
A thin film of magnetic recording material is sputter deposited over a base layer of gold and tantalum on a polished substrate. A protective layer of gold and tantalum is deposited overlaying the magnetic recording film. A solid lubricant layer such as carbon, preferably in the form of graphite, gold, silver, tin, molybdenum disulfide, and tungsten disulfide is sputter deposited or ion plated over the protective layer to reduce wear. The recording contacting portion of the recording head is similarly coated with a solid lubricant material. Other suitable protective materials include tantalum, niobium, tungsten and nitrides and carbides of such metals. In a preferred method for making such recording members, the layers are successively sputter deposited in an evacuated sputter chamber, whereby the recording layers and protective coatings are formed in a continuous process requiring only one pump down.
In a magnetic recording medium, a substrate member, a film of magnetic recording material overlaying said substrate, and a protective layer of gold and tantalum overlaying said film of magnetic recording material.
In a method for making a magnetic recording medium, depositing a film of magnetic recording material onto a substrate member, and depositing a layer of gold and tantalum over said film of magnetic recording material.
In a method for making a magnetic recording medium the steps of, depositing at subatmospheric pressure a base layer of a metal selected from the group consisting of molybdenum, titanium, chromium, niobium, tantalum, vanadium, and tungsten overlaying a substrate member, said substrate member comprising a material selected from the class consisting of ceramic, aluminum and glass, depositing at subatmospheric pressure a film of magnetic recording material over said first layer, and depositing at subatmospheric pressure a protective layer of material selected from the class consisting of niobium, tantalum, and tungsten over said magnetic recording film.
In a method for making a recording medium, the steps of, growing a film of recording material onto a substrate member, and growing a protective layer of material over said film of recording material, such protective layer being selected from the class consisting of niobium, tantalum, tungsten, refractory carbides and refractory nitrides.
Dependencies are inferred from the claim text.