Data reader with spin filter
AssigneeSeagate Technology LLC
InventorsDavid A. Deen, Taras G. Pokhil
Life of this patent
Estimating the term…
Abstract
A data reader may be configured with at least a detector stack positioned on an air bearing surface and consisting of a spin accumulation channel continuously extending from the air bearing surface to an injector stack. The injector stack can have at least one cladding layer contacting the spin accumulation channel. The at least one cladding layer may have a length as measured perpendicular to the ABS that filters minority spins from the detector stack.
Claims20
An apparatus comprising a spin accumulation channel continuously extending from an air bearing surface (ABS) and disposed between an injector and detector, the detector contacting the spin accumulation channel and the ABS, the injector contacting the spin accumulation channel and separated from the ABS and detector, a controller configured to pass a read signal from at least two separate terminals each positioned proximal the injector to at least one terminal positioned proximal the detector to sense data bits on a data storage medium proximal the ABS.
An apparatus comprising first and second data readers positioned on an air bearing surface (ABS), each data reader comprising a spin accumulation channel continuously extending from an air bearing surface (ABS) and disposed between an injector and detector, the detector of each data reader contacting the spin accumulation channel and the ABS, the injector of each data reader contacting the spin accumulation channel and separated from the ABS and detector, a controller configured to pass a read signal from first and second injector terminals to third and fourth detector terminals to sense data bits on a data storage medium proximal the ABS with the respective data readers.
A method comprising:
- position a data reader proximal a data storage medium, the data reader comprising a spin accumulation channel continuously extending from an air bearing surface (ABS) and disposed between an injector and detector, the detector contacting the spin accumulation channel and the ABS, the injector contacting the spin accumulation channel and separated from the ABS and detector;
- and
- passing a read signal from at least two separate injector terminals each positioned proximal the injector to at least one detector terminal positioned proximal the detector as directed by a controller to sense data bits on the data storage medium.
Dependencies are inferred from the claim text.