Copper alloy GMR recording head
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Dec 17, 2002
Grant Date -
N/A
app pub date -
Mar 20, 2000
filing date -
Mar 20, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A spin valve structure that is thinner than currently available spin valves is described. This improvement is achieved through use of a thinner free layer. The key feature of the invention is the insertion of a seed enhancement layer between the seed and the free layer. The seed enhancement layer must have a FCC crystal structure, our preferred material for it being NiCu. When this layer is present, a constant GMR ratio of about 7% is obtained for a thickness range of the free layer of from 10 to 40 Angstroms. A process for manufacturing this structure is also disclosed.
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