Memory device with active and passive layers
AssigneeAdvanced Micro Devices, Inc.
InventorsJuri H. Krieger, Nikolai Yudanov
Life of this patent
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Abstract
A memory including memory cells having active and passive layers may store multiple information bits. The active layer may include an organic polymer that has a variable resistance based on the movement of charged species (ions or ions and electrons) between the passive layer and the active layer. The passive layer may be a super-ionic material that has high ion and electron mobility. The active layer may be self-assembled from a monomer in a liquid or gas.
Claims26
A method for forming a memory having a plurality of reversibly programmable memory cells, comprising:
- forming a plurality of first electrodes comprising copper on a substrate;
- forming a passive layer comprising copper sulfide on each of the plurality of first electrodes;
- selectively forming a polymer layer only over the passive layer on each of the plurality of first electrodes to form an active layer thereon by exposing the passive layer to a monomer gas such that material in the monomer gas self-assembles only on the passive layer on each of the plurality of first electrodes to form a polymer in the active layer, the polymer having a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, and
- forming a plurality of second electrodes over the active layer.
A method for forming a memory having a plurality of reversibly programmable memory cells, comprising:
- forming a plurality of first electrodes comprising copper on a substrate;
- forming a passive layer comprising copper sulfide on each of the plurality of first electrodes;
- selectively forming a polymer layer only over the passive layer on each of the plurality of first electrodes to form an active layer thereon by exposing the passive layer to a monomer gas such that material in the monomer gas self-assembles only on the passive layer on each of the plurality of first electrodes to form a polymer in the active layer, the polymer having a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, selectivity forming a polymer layer comprises:
- forming a layer of polyphenylacetylene (PPA) or polydiphenylacetylene (PDPA) as the active layer;
- and
- forming a plurality of second electrodes over the active layer.
A method for forming a memory having a plurality of reversibly programmable memory cells, comprising:
- forming a plurality of first electrodes on a substrate;
- forming a passive layer comprising a superionic material on each of the plurality of first electrodes;
- selectively forming a polymer layer only over the passive layer on each of the plurality of first electrodes to form an active layer thereon by exposing the passive layer to a gas such that material in the gas self-assembles only on the passive layer on each of the plurality of first electrodes to form the polymer layer, the polymer layer having a reversibly variable electrical conductivity upon the introduction and removal of charged species from the passive layer, and
- forming a plurality of second electrodes over the active layer.
Dependencies are inferred from the claim text.