Molybdenum containing targets
View Patent ↗The invention is directed at sputter targets including 50 atomic % or more molybdenum, a second metal element of niobium or vanadium, and a third metal element selected from the group consisting of titanium, chromium, niobium, vanadium, and tantalum, wherein the third metal element is different from the second metal element, and deposited films prepared by the sputter targets. In a preferred aspect of the invention, the sputter target includes a phase that is rich in molybdenum, a phase that is rich in the second metal element, and a phase that is rich in the third metal element.
1. A sputter target that is sputterable to form a film comprising an alloy containing molybdenum, a second metal element, and a third metal element, the sputter target comprising:
40 atomic % or more molybdenum, based on the total number of atoms in the sputter target;
0.1 atomic % or more of a second metal element, based on the total number of atoms in the sputter target, wherein the second metal element is niobium; and
at least 5 atomic % of a third metal element, based on the total number of atoms in the sputter target, wherein the third metal element is selected from the group consisting of zirconium, hafnium, and chromium,
wherein a total concentration of molybdenum, the second metal element, and the third metal element in the sputter target is 95 atomic percent or more, based on the total number of atoms in the sputter target.
2. The sputter target of claim 1 , wherein the sputter target contains less than 85 atomic % molybdenum.
3. The sputter target of claim 1 , wherein the sputter target contains at least 2 atomic % of the second metal element.
4. The sputter target of claim 1 , wherein the sputter target contains at least 5 atomic % of the second metal element.
5. The sputter target of claim 1 , wherein (i) the sputter target contains 0.1 atomic % or more of a fourth metal element, based on the total number of atoms in the sputter target, (ii) the fourth metal element is selected from the group consisting of vanadium, tantalum, tungsten, zirconium, hafnium, chromium, and titanium, and (iii) the fourth metal element is different from the second metal element and different from the third metal element.
6. The sputter target of claim 5 , wherein (i) the sputter target contains 0.1 atomic % or more of a fifth metal element, based on the total number of atoms in the sputter target, (ii) the fifth metal element is selected from the group consisting of vanadium, tantalum, tungsten, zirconium, hafnium, chromium, and titanium, and (iii) the fifth metal element is different from the second metal element, different from the third metal element, and different from the fourth metal element.
7. The sputter target of claim 1 , wherein the third metal element is zirconium.
8. The sputter target of claim 1 , wherein the third metal element is hafnium.
9. The sputter target of claim 1 , wherein the third metal element is chromium.
10. The sputter target of claim 1 , wherein the sputter target contains at least 0.5 atomic % of the second metal element.
11. The sputter target of claim 1 , wherein the sputter target contains at least 1 atomic % of the second metal element.
12. The sputter target of claim 1 , wherein the total concentration of molybdenum, the second metal element, and the third metal element in the sputter target is 99 atomic percent or more, based on the total number of atoms in the sputter target.
13. The sputter target of claim 1 , wherein the total concentration of molybdenum, the second metal element, and the third metal element in the sputter target is 99.5 atomic percent or more, based on the total number of atoms in the sputter target.
14. A sputter target that is sputterable to form a film comprising an alloy containing molybdenum, a second metal element, and a third metal element, the sputter target comprising:
less than 85 atomic % molybdenum, based on the total number of atoms in the sputter target;
0.1 atomic % or more of a second metal element, based on the total number of atoms in the sputter target, wherein the second metal element is selected from the group consisting of niobium, tantalum, tungsten, zirconium, and hafnium; and
2 atomic % or more of a third metal element, based on the total number of atoms in the sputter target, wherein (i) the third metal element is selected from the group consisting of tantalum, tungsten, and hafnium, and (ii) the third metal element is different from the second metal element,
wherein a total concentration of molybdenum, the second metal element, and the third metal element in the sputter target is 95 atomic percent or more, based on the total number of atoms in the sputter target.
15. The sputter target of claim 14 , wherein the sputter target contains at least 1 atomic % of the second metal element.
16. The sputter target of claim 14 , wherein the sputter target contains at least 2 atomic % of the second metal element.
17. The sputter target of claim 14 , wherein the sputter target contains at least 5 atomic % of the second metal element.
18. The sputter target of claim 14 , wherein the sputter target contains at least 5 atomic % of the third metal element.
19. The sputter target of claim 14 , wherein (i) the sputter target contains 0.1 atomic % or more of a fourth metal element, based on the total number of atoms in the sputter target, (ii) the fourth metal element is selected from the group consisting of niobium, tantalum, tungsten, zirconium, and hafnium, and (iii) the fourth metal element is different from the second metal element and different from the third metal element.
20. The sputter target of claim 19 , wherein (i) the sputter target contains 0.1 atomic % or more of a fifth metal element, based on the total number of atoms in the sputter target, (ii) the fifth metal element is selected from the group consisting of niobium, tantalum, tungsten, zirconium, and hafnium, and (iii) the fifth metal element is different from the second metal element, different from the third metal element, and different from the fourth metal element.
21. The sputter target of claim 14 , wherein the sputter target contains 83 atomic % or less molybdenum.
22. The sputter target of claim 14 , wherein the sputter target contains 81 atomic % or less molybdenum.
23. The sputter target of claim 14 , wherein the total concentration of molybdenum, the second metal element, and the third metal element in the sputter target is 99 atomic percent or more, based on the total number of atoms in the sputter target.
24. The sputter target of claim 14 , wherein the total concentration of molybdenum, the second metal element, and the third metal element in the sputter target is 99.5 atomic percent or more, based on the total number of atoms in the sputter target.