Resistance change element, storage device, and neural network apparatus
AssigneeKabushiki Kaisha Toshiba
InventorsKoichi Mizushima, Yoshifumi Nishi, Kumiko Nomura
Life of this patent
Estimating the term…
Abstract
According to one embodiment, a resistance change element includes a first electrode, a second electrode, a first transition metal compound layer provided between the first electrode and the second electrode and including lithium ions in lattice site locations, a second transition metal compound layer provided between the first transition metal compound layer and the second electrode and including the lithium ions in the lattice site locations, and a lithium ion conductor layer provided between the first transition metal compound layer and the second transition metal compound layer and being a solid material allowing the lithium ions to pass therethrough and resistant to electrons.
Claims16
A storage device comprising:
- a resistance change element including:
- a first electrode;
- a second electrode;
- a first transition metal compound layer provided between the first electrode and the second electrode and including lithium ions in lattice site locations;
- a second transition metal compound layer provided between the first transition metal compound layer and the second electrode and including the lithium ions in the lattice site locations;
- and
- a lithium ion conductor layer provided between the first transition metal compound layer and the second transition metal compound layer and being a solid material allowing the lithium ions to pass therethrough and resistant to electrons;
- a control circuit connected to the resistance change element and configured to control a write operation and a read operation using the resistance change element;
- an output circuit connected to the resistance change element and configured to output an output voltage based on the read operation;
- and
- a first circuit configured to couple the output circuit to one of the first electrode and the second electrode of the resistance change element, wherein
- in the read operation, the first circuit switches from a state in which an input pulse is applied to the first electrode and the second electrode is coupled to the output circuit to a state in which the input pulse is applied to the second electrode and the first electrode is coupled to the output circuit.
A storage device comprising:
- a resistance change element including:
- a first electrode;
- a second electrode;
- a first transition metal compound layer provided between the first electrode and the second electrode, including lithium ions, and containing at least one of a rock salt type transition metal oxide and a spinel type transition metal oxide;
- a second transition metal compound layer provided between the first transition metal compound layer and the second electrode and containing at least one of Li7Ti5O12 and Li4Ti5O12;
- and
- a lithium ion conductor layer provided between the first transition metal compound layer and the second transition metal compound layer and being a solid material allowing the lithium ions to pass therethrough and resistant to electrons;
- a control circuit connected to the resistance change element and configured to control a write operation and a read operation using the resistance change element;
- an output circuit connected to the resistance change element and configured to output an output voltage based on the read operation;
- and
- a first circuit configured to couple the output circuit to one of the first electrode and the second electrode of the resistance change element, wherein
- in the read operation, the first circuit switches from a state in which an input pulse is applied to the first electrode and the second electrode is coupled to the output circuit to a state in which the input pulse is applied to the second electrode and the first electrode is coupled to the output circuit.
Dependencies are inferred from the claim text.