Solid-state memory device, data processing system, and data processing device
First Claim
1. A solid-state memory device comprising:
- first and second electrodes arranged to a first direction; and
a superlattice laminate sandwiched between the first and second electrodes, the superlattice laminate having a plurality of crystal layers laminated one another, the crystal layers including first and second crystal layers having mutually different compositions, whereinat least a part of the superlattice laminate has an interface of the first and second crystal layers that intersects with the first direction, andthe first crystal layer included in the superlattice laminate comprises a phase change material.
6 Assignments
0 Petitions
Accused Products
Abstract
A solid-state memory device includes: a superlattice laminate having plural crystal layers laminated therein, the crystal layers including first and second crystal layers having mutually opposite compositions; a lower electrode provided on a first surface in a laminating direction of the superlattice laminate; and an upper electrode provided on a second surface of the superlattice laminate in the laminating direction. The first crystal layer included in the superlattice laminate is made of a phase change compound. According to the present invention, the superlattice laminate laminated in opposite directions of the upper and lower electrodes is sandwiched between these electrodes. Therefore, when an electric energy is applied to the superlattice laminate via these electrodes, a uniform electric energy can be applied to a laminated surface of the superlattice laminate. Accordingly, fluctuation of a resistance is small even when information is repeatedly rewritten, and data can be read stably as a result.
18 Citations
24 Claims
-
1. A solid-state memory device comprising:
-
first and second electrodes arranged to a first direction; and a superlattice laminate sandwiched between the first and second electrodes, the superlattice laminate having a plurality of crystal layers laminated one another, the crystal layers including first and second crystal layers having mutually different compositions, wherein at least a part of the superlattice laminate has an interface of the first and second crystal layers that intersects with the first direction, and the first crystal layer included in the superlattice laminate comprises a phase change material. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A data processing system comprising:
-
a solid-state memory device; a data processor; and a system bus that connects the solid-state memory device to the data processor, wherein a memory cell included in the solid-state memory device comprises; first and second electrodes arranged to a first direction; and a superlattice laminate sandwiched between the first and second electrodes, the superlattice laminate having a plurality of crystal layers laminated one another, the crystal layers including first and second crystal layers having mutually different compositions, wherein at least a part of the superlattice laminate has an interface of the first and second crystal layers that intersects with the first direction, and the first crystal layer included in the superlattice laminate comprises a phase change material.
-
-
23. A solid-sate memory comprising:
-
a data-rewritable user area; and a defective-address storing circuit that stores a defective address included in the user area, wherein a memory cell included in the defective-address storing circuit comprises; first and second electrodes arranged to a first direction; and a superlattice laminate sandwiched between the first and second electrodes, the superlattice laminate having a plurality of crystal layers laminated one another, the crystal layers including first and second crystal layers having mutually different compositions, wherein at least a part of the superlattice laminate has an interface of the first and second crystal layers that intersects with the first direction, and the first crystal layer included in the superlattice laminate comprises a phase change material.
-
-
24. A data processing device comprising:
-
a program area; and a data processing circuit that performs a predetermined operation in accordance with a program stored in the program area, wherein a memory cell included in the program area comprises; first and second electrodes arranged to a first direction; and a superlattice laminate sandwiched between the first and second electrodes, the superlattice laminate having a plurality of crystal layers laminated one another, the crystal layers including first and second crystal layers having mutually different compositions, wherein at least a part of the superlattice laminate has an interface of the first and second crystal layers that intersects with the first direction, and the first crystal layer included in the superlattice laminate comprises a phase change material.
-
Specification