Two-terminal reversibly switchable memory device
First Claim
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1. A method, comprising:
- providing a memory element (ME) including a first ion reservoir having mobile oxygen ions and in contact with a first electrode of a two-terminal switch and a tunnel barrier and a second reservoir in contact with the tunnel barrier and positioned between a second electrode of the two-terminal switch and the tunnel barrier, the second reservoir operative as a repository for the mobile oxygen ions; and
applying a read voltage across the first and second electrodes, the read voltage operative to generate a read current having a magnitude that is indicative of a present conductivity of the ME, wherein applying the read voltage is non-destructive to the present conductivity of the ME.
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Abstract
A memory using mixed valence conductive oxides is disclosed. The memory includes a mixed valence conductive oxide that is less conductive in its oxygen deficient state and a mixed electronic ionic conductor that is an electrolyte to oxygen and promotes an electric field effective to cause oxygen ionic motion.
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Citations
20 Claims
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1. A method, comprising:
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providing a memory element (ME) including a first ion reservoir having mobile oxygen ions and in contact with a first electrode of a two-terminal switch and a tunnel barrier and a second reservoir in contact with the tunnel barrier and positioned between a second electrode of the two-terminal switch and the tunnel barrier, the second reservoir operative as a repository for the mobile oxygen ions; and applying a read voltage across the first and second electrodes, the read voltage operative to generate a read current having a magnitude that is indicative of a present conductivity of the ME, wherein applying the read voltage is non-destructive to the present conductivity of the ME. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus, comprising:
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a first electrode; a second electrode; and a memory element (ME) positioned between the first and second electrodes, the ME electrically in series with the first and second electrodes, the ME including; a first ion reservoir including mobile oxygen ions, the first ion reservoir in contact with the first electrode, a tunnel barrier in contact with the first ion reservoir and the second electrode, wherein the tunnel barrier made from a material that is an electrolyte to the mobile oxygen ions and is permeable by the mobile oxygen ions when a first voltage is applied across the first and second electrodes, and the tunnel barrier is electrically in series with the first ion reservoir; and a second reservoir in contact with the tunnel barrier and positioned between the second electrode and the tunnel barrier, the second reservoir operative as a repository for the mobile oxygen ions. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification