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US 7,443,711 B1Granted
Non-volatile programmable impedance nanoscale devices
AssigneeHewlett-Packard Development Company, L.P.
InventorsDuncan R. Stewart, Patricia A. Beck, Douglas A. Ohlberg
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Abstract
Programmable impedance devices and methods of fabricating the devices are disclosed. The programmable impedance devices exhibit non-volatile tunable impedance properties. A programmable impedance device includes a first electrode, a second electrode and a programmable material disposed between the two electrodes. The programmable material may be disposed at a junction between the first and second electrodes.
Claims30
A programmable impedance device, comprising:
- a first electrode;
- a second electrode disposed to form a junction wherein the second electrode at least partially overlaps the first electrode;
- and
- a programmable material of nanometer-scale thickness disposed between the first electrode and the second electrode at least at the junction, the programmable material operably coupling the first electrode and the second electrode such that the programmable impedance device exhibits a non-volatile programmable impedance that is tunable through a continuum of impedance values between and including a low impedance state and a high impedance state using a first bias direction to decrease the impedance and a second bias direction to increase the impedance.
1 more element
A programmable impedance device, comprising:
- a first electrode;
- a second electrode disposed to form a junction wherein the second electrode at least partially overlaps the first electrode;
- and
- a programmable material disposed between the first electrode and the second electrode at least at the junction, the programmable material operably coupling the first electrode and the second electrode such that the programmable impedance device exhibits a non-volatile programmable impedance that is tunable through a continuum of impedance values between and including a low impedance state and a high impedance state using a first bias direction to decrease the impedance and a second bias direction to increase the impedance, wherein the programmable material comprises an inorganic material.
1 more element
A programmable impedance device, comprising:
- a first electrode;
- a second electrode disposed to form a junction wherein the second electrode at least partially overlaps the first electrode;
- and
- a programmable material disposed between the first electrode and the second electrode at least at the junction, the programmable material operably coupling the first electrode and the second electrode such that the programmable impedance device exhibits a non-volatile programmable impedance that is tunable through a continuum of impedance values between and including a low impedance state and a high impedance state using a first bias direction to decrease the impedance and a second bias direction to increase the impedance, wherein the non-volatile programmable impedance is substantially constant for at least 2.5 years.
1 more element
Dependencies are inferred from the claim text.