Arsenic-containing variable resistance materials
View Patent ↗A variable resistance material for memory applications. The material includes a base Ge—Sb—Te composition and further includes As-doping. The materials were included in variable resistance memory devices. Incorporation of As in the variable resistance composition led to a significant increase in the operational life of the device and, unexpectedly, did not reduce the programming speed of the device. In one embodiment, the composition includes at atomic concentration of Ge in the range from 7%-13%, an atomic concentration of Sb in the range from 50%-70%, an atomic concentration of Te in the range from 20%-30%, and an atomic concentration of As in the range from 2%-15%.
1. A variable resistance material comprising Ge, Sb, Te, and As, wherein the atomic concentration of Ge is in the range from 7%-13%, the atomic concentration of Sb is in the range from 50%-70%, the atomic concentration of Te is in the range from 20%-30%, and the atomic concentration of As is in the range from 2%-15%.
2. The variable resistance material of claim 1 , wherein the atomic concentration of As is in the range from 5-10%.
3. The variable resistance material of claim 1 , wherein the atomic concentration of Te is in the range from 22%-28%.
4. The variable resistance material of claim 3 , wherein the atomic concentration of As is in the range from 5%-10%.
5. The variable resistance material of claim 1 , wherein the atomic concentration of Sb is in the range from 55%-65%.
6. The variable resistance material of claim 5 , wherein the atomic concentration of Te is in the range from 22%-28%.
7. The variable resistance material of claim 6 , wherein the atomic concentration of As is in the range from 5%-10%.
8. The variable resistance material of claim 5 , wherein the atomic concentration of As is in the range from 5%-10%.
9. The variable resistance material of claim 1 , wherein the atomic concentration of Ge is in the range from 8%-12%.
10. The variable resistance material of claim 9 , wherein the atomic concentration of As is in the range from 5-10%.
11. The variable resistance material of claim 9 , wherein the atomic concentration of Te is in the range from 22%-28%.
12. The variable resistance material of claim 11 , wherein the atomic concentration of As is in the range from 5%-10%.
13. The variable resistance material of claim 9 , wherein the atomic concentration of Sb is in the range from 55%-65%.
14. The variable resistance material of claim 13 , wherein the atomic concentration of Te is in the range from 22%-28%.
15. The variable resistance material of claim 14 , wherein the atomic concentration of As is in the range from 5%-10%.
16. The variable resistance material of claim 13 , wherein the atomic concentration of As is in the range from 5%-10%.
17. The variable resistance material of claim 1 , wherein the atomic concentration of Ge is in the range from 9%-11%.
18. The variable resistance material of claim 17 , wherein the atomic concentration of As is in the range from 5-10%.
19. The variable resistance material of claim 17 , wherein the atomic concentration of Te is in the range from 22%-28%.
20. The variable resistance material of claim 19 , wherein the atomic concentration of As is in the range from 5%-10%.
21. The variable resistance material of claim 17 , wherein the atomic concentration of Sb is in the range from 55%-65%.
22. The variable resistance material of claim 21 , wherein the atomic concentration of Te is in the range from 22%-28%.
23. The variable resistance material of claim 22 , wherein the atomic concentration of As is in the range from 5%-10%.
24. The variable resistance material of claim 21 , wherein the atomic concentration of As is in the range from 5%-10%.
25. The variable resistance material of claim 1 , wherein said material is a phase-change material.
26. The variable resistance material of claim 25 , wherein said phase-change material is electrically stimulable.
27. An electronic device comprising the variable resistance material of claim 1 , said electronic device including a first electrode in electrical communication with said variable resistance material and a second electrode in electrical communication with said variable resistance material.