Magnetic thin film media with a bi-layer structure of CrTi/Nip

Details Magnetic thin film media with a bi-layer structure of CrTi/Nip Magnetic thin film media with a bi-layer structure of CrTi/Nip

2005-02-22

2005-02-22

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Composite

Of inorganic material

C428S611000, C428S667000, C428S668000, C428S900000, C427S130000, C427S131000

Reexamination Certificate

active

06858331

ABSTRACT:
A thin film magnetic media structure with a bi-layer structure of amorphous chromium titanium (CrTi) followed by an amorphous layer of nickel phosphorus (NiP) is disclosed. After the NiP has been deposited it is exposed to oxygen to form an oxidized surface. Preferably the underlayer is deposited directly onto the oxidized NiP surface. The bi-layer structure of CrTi/NiP promotes excellent in-plane crystallographic orientation in the cobalt alloy magnetic layer(s) and allows an ultra-thin chromium underlayer to be used which provides better control over grain size and distribution. When the CrTi/NiP bi-layer structure is combined with a circumferentially textured substrate, preferably glass, a high Mrt orientation ratio (OR) results.

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