Data reader with resonant tunneling
AssigneeSeagate Technology LLC
InventorsDavid A. Deen, Thomas E. Dunn
Life of this patent
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Abstract
A data reader may have an resonant tunnel structure disposed between first and second magnetic structures. The resonant tunnel structure can be configured with a spacer layer disposed between first and second barrier layers. The first barrier layer can have a first thickness that is smaller than a second thickness of the second barrier layers with the thicknesses each measured along a common plane to provide resonant tunneling for the data reader.
Claims20
An apparatus comprising a data reader having a resonant tunnel structure disposed between first and second magnetic structures, the resonant tunnel structure comprising a spacer layer disposed between first and second barrier layers having different thicknesses measured along a common plane.
An apparatus comprising:
- a data reader a data reader having a resonant tunnel structure disposed between first and second magnetic structures, the resonant tunnel structure comprising a first barrier layer having a first thickness, a second barrier layer having a second thickness, and a spacer layer having a third thickness, the spacer layer disposed between first and second barrier layers, the first, second, and third thicknesses being different and each measured along a common plane;
- a data storage medium separated from the data reader by an air bearing;
- and
- a data bit stored in the data storage medium.
A method comprising:
- disposing an resonant tunnel structure of a data reader between first and second magnetic structures, the resonant tunnel structure comprising a spacer layer disposed between first and second barrier layers having different thicknesses measured along a common plane;
- and
- passing a current through the data reader to sense a data bit stored on an adjacent data storage medium.
Dependencies are inferred from the claim text.