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Sheet random access memory

  • US 4,791,604 A
  • Filed: 07/23/1986
  • Issued: 12/13/1988
  • Est. Priority Date: 02/15/1984
  • Status: Expired due to Term
First Claim
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1. A nonvolatile random access memory comprising:

  • a substrate including a plurality of separate magnetically polarizable ferromagnetic domains at a corresponding plurality of distinguishable fixed locations;

    fixed drive means for selectively creating a fixed predetermined net magnetic polarization of at least some of said domains within said substrate at a randomly accessed one of said distinguishable fixed locations by aligning at least some of said domains at said fixed location without propagation of a magnetic region within said substrate; and

    fixed sensing means for selectively sensing the direction of magnetic polarity of an arbitrarily selected one of said plurality of distinguishable ferromagnetic domains,whereby a true, random, nonvolatile mass memory is provided.

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