Magnetic thin film media with a pre-seed layer of CrTi
AssigneeHitachi Global Storage Technologies Netherlands B.V.
InventorsXiaoping Bian, Mary Frances Doerner, Mohammad Taghi Mirzamaani, Tim Minvielle, Kai Tang
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Abstract
A thin film magnetic media structure comprising a pre-seed layer CrTi is disclosed. The CrTi pre-seed layer presents an amorphous or nanocrystalline structure. The preferred seed layer is RuAl. The use of the CrTi/RuAl bilayer structure provides superior adhesion to the substrate and resistance to scratching, as well as, excellent coercivity and signal-to-noise ratio (SNR) and reduced cost over the prior art.
Claims17
A thin film layer structure comprising:
- a layer of CrTi having from 35 to 55 at. % Ti and having an amorphous or nanocrsytalline structure;
- and
- a layer of RuAl above the layer of CrTi, the RuAl having a B2 crystallographic structure.
A magnetic thin film storage medium comprising:
- a substrate;
- a layer of CrTi deposited on the substrate;
- a layer of RuAl over the layer of CrTi;
- and
- at least one magnetic layer over the layer of RuAl.
A method of fabricating a magnetic thin film storage medium comprising the steps of:
- depositing a layer of CrTi on a substrate;
- depositing a layer of RuAl over the layer of CrTi;
- and
- depositing a plurality of layers over the layer of RuAl, including at least one magnetic layer.
A disk drive comprising:
- a magnetic transducer including a read and a write head;
- a spindle;
- and
- a magnetic thin film disk mounted on the spindle, the magnetic thin film disk including a layer of CrTi followed by a layer of RuAl and at least one magnetic layer.
Dependencies are inferred from the claim text.