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US 6,806,526 B2Granted
Memory device
AssigneeAdvanced Micro Devices, Inc.
InventorsJuri H. Krieger, Nikolai Yudanov
Life of this patent
Estimating the term…
Abstract
A memory storage and retrieval device containing (a) an electrically conductive first electrode; (b) an electrically conductive second electrode; and (c) a layer stack intermediate the first and second electrodes containing (d) at least one active layer containing at least one polymer with variable electrical conductivity; and (e) at least one passive layer comprised of a material for varying the electrical conductivity of the at least one active layer upon application of an electrical potential difference between the first and second electrodes.
Claims20
A reversibly programmable memory comprising at least one memory cell, the at least one memory cell comprising:
- a first conductive electrode layer;
- a passive layer formed over the first conductive electrode layer, the passive layer being a superionic material adapted to reversibly donate and accept charged species, the charged species including ions or ions and electrodes;
- an active layer formed over the passive layer, the active layer being an organic polymer that has a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, the organic polymer having a relatively lower electrical conductivity when free of charged species and a relatively higher electrical conductivity when charged species are introduced;
- and
- a second conductive electrode layer formed over the active layer;
- wherein the passive layer reversibly donates and accepts charged species to and from the active layer when an electrical potential difference is applied between the first conductive electrode layer and the second conductive electrode layer, and the first conductive electrode layer and the second conductive electrode layer are used to both program the memory cell to store information and read stored information from the memory cell.
3 more elements
A reversibly programmable memory comprising at least one memory cell, the at least one memory cell comprising:
- a first conductive electrode layer made of copper;
- a passive layer formed over the first conductive electrode layer, the passive layer being a superionic material including copper sulfide adapted to reversibly donate and accept charged species, the charged species including ions or ions and electrons;
- an active layer formed over the passive layer, the active layer being an organic polymer that has a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, the organic polymer having a relatively lower electrical conductivity when free of charged species and a relatively higher electrical conductivity when charged species are introduced;
- and
- a second conductive electrode layer formed over the active layer;
- wherein the passive layer reversibly donates and accepts charged species to and from the active layer when an electrical potential difference is applied between the first conductive electrode layer and the second conductive electrode layer, and the first conductive electrode layer and the second conductive electrode layer are used to both program the memory cell to store information and read stored information from the memory cell.
3 more elements
A reversibly programmable memory comprising at least one memory cell, the at least one memory cell comprising:
- a first conductive electrode layer;
- a passive layer formed over the first conductive electrode layer, the passive layer being a superionic material including copper sulfide adapted to reversibly donate and accept charged species, the charged species including ions or ions and electrons;
- an active layer formed over the passive layer, the active layer being an organic polymer that has a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, the organic polymer having a relatively lower electrical conductivity when free of charged species and a relatively higher electrical conductivity when charged species are introduced;
- and
- a second conductive electrode layer formed over the active layer;
- wherein the passive layer reversibly donates and accepts charged species to and from the active layer when an electrical potential difference is applied between the first conductive electrode layer and the second conductive electrode layer, and the first conductive electrode layer and the second conductive electrode layer are used to both program the memory cell to store information and read stored information from the memory cell.
3 more elements
A reversibly programmable memory comprising at least one memory cell, the at least one memory cell comprising:
- a first conductive electrode layer;
- a passive layer formed over the first conductive electrode layer, the passive layer being a superionic material adapted to reversibly donate and accept charged species, the charged species including ions or ions and electrons;
- an active layer formed over the passive layer, the active layer comprising polyphenylacetylene (PPA) or polydiphenylacetylene (PDPA) having a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, the PPA or PDPA having a relatively lower electrical conductivity when free of charged species and a relatively higher electrical conductivity when charged species are introduced;
- and
- a second conductive electrode layer formed over the active layer;
- wherein the passive layer reversibly donates and accepts charged species to and from the active layer when an electrical potential difference is applied between the first conductive electrode layer and the second conductive electrode layer, and the first conductive electrode layer and the second conductive electrode layer are used to both program the memory cell to store information and read stored information from the memory cell.
3 more elements
A reversibly programmable memory comprising at least one memory cell, the at least one memory cell comprising:
- a first conductive electrode layer made of copper;
- a passive layer formed over the first conductive electrode layer, the passive layer being a superionic material including copper sulfide adapted to reversibly donate and accept charged species, the charged species including ions or ions and electrons;
- an active layer formed over the passive layer, the active layer comprising polyphenylacetylene (PPA) or polydiphenylacetylene (PDPA) having a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, the PPA or PDPA having a relatively lower electrical conductivity when free of charged species and a relatively higher electrical conductivity when charged species are introduced;
- and
- a second conductive electrode layer formed over the active layer;
- wherein the passive layer reversibly donates and accepts charged species to and from the active layer when an electrical potential difference is applied between the first conductive electrode layer and the second conductive electrode layer, and the first conductive electrode layer and the second conductive electrode layer are used to both program the memory cell to store information and read stored information from the memory cell.
3 more elements
Dependencies are inferred from the claim text.