Wall topology storage system
AssigneeInternational Business Machines Corporation
InventorOtto Voegeli
Life of this patent
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Abstract
A wall topology storage system wherein information in the form of data bits is stored as polarity reversals in magnetic domain walls separating adjacent magnetic domains. A plurality of bits is stored in each wall as a plurality of reversals, resulting in greater storage capacity than when using the adjacent domain itself.
Claims13
A data storage apparatus comprising a magnetic storage medium having a series of stripe domains separated by domain walls having at least one polarity reversal in the wall, the sign of said polarity reversal representing data stored in the wall, and
- a drive film comprising a series of stripe domains separated by domain walls and located adjacent to and orthogonal to the stripe domains in said storage medium, wherein the intersections of the domain walls of said storage medium and of said drive film define bit locations.
A method of reading data stored as the sign of the polarity reversals in domain wall in a magnetic storage medium having a series of stripe domains separated by domain walls and having a drive film comprising a series of stripe domains separated by domain walls and located adjacent to and orthogonal to said stripe domains in said storage medium and where the intersections of the domain walls of said storage medium and of said drive film define bit locations comprising the steps of
- sensing the sign of the polarity of the wall reversal at a first bit location as indicative of data stored in the walls.
Dependencies are inferred from the claim text.