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US 12,557,564 B2Granted
Memory cell with a variable element and a phase change memory
AssigneeInternational Business Machines Corporation
InventorsNing Li, Andrew Herbert Simon, Injo Ok, Kangguo Cheng, Timothy Mathew Philip, Kevin W. Brew, Jin Ping Han, Juntao Li, Nicole Saulnier
Life of this patent
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Abstract
An electrical device includes a first electrode in series with a second electrode. A phase change memory (PCM) is in series with the second electrode. A variable electrical element is in series with the phase change memory.
Claims18
An electrical device, comprising:
- a first electrode in series with a second electrode;
- a phase change memory (PCM) in series with the second electrode;
- and
- a variable electrical element in series with the PCM,
- wherein the variable electrical element includes at least one oxide layer, and wherein the first electrode is a bottom electrode in direct contact with the at least one oxide layer and is in direct contact with the PCM.
2 more elements
An electrical device, comprising:
- a phase change memory (PCM) in direct contact with both a first electrode and a layer with one or more metal interconnects;
- and
- a variable electrical element in direct contact with the PCM and in series with the PCM and comprising at least one oxide layer,
- wherein the first electrode is a bottom electrode in direct contact with the at least one oxide layer, and wherein the first electrode is in direct contact with the PCM.
1 more element
A method for forming an electrical device, the method comprising:
- providing a layer with one or more metal interconnects;
- providing an insulator layer over the layer with the one or more metal interconnects;
- forming a first electrode in the insulator layer and in direct contact with at least one metal interconnect of the layer with the one or more metal interconnects;
- providing a phase change memory (PCM) over the first electrode and in direct contact with the first electrode;
- providing a second electrode over the PCM and in direct contact with the PCM;
- and
- providing a variable electrical element in series with the PCM, the variable electrical element having at least one oxide layer in direct contact with the first electrode, wherein the PCM and the at least one oxide layer are in series.
4 more elements
Dependencies are inferred from the claim text.