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Scanning tunneling microscope

  • US 4,939,363 A
  • Filed: 06/23/1989
  • Issued: 07/03/1990
  • Est. Priority Date: 06/23/1988
  • Status: Expired due to Term
First Claim
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1. A scanning tunneling microscope for investigating the distribution of the electron spins at the surface of a specimen, comprising:

  • a tip disposed above the surface of the specimen;

    means for emitting electrons whose spins are polarized in one direction;

    means for supporting said tip at a specified distance from the surface of the specimen and letting said tip scan the surface of the specimen;

    means for applying a specified voltage between the tip and the specimen and causing a tunnel current to flow between said tip and the specimen;

    means for detecting the tunnel current; and

    means for forming and displaying an image according the tunnel current detected.

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