Methods for vapor deposition of group 4 transition metal-containing films using Group 4 transition metal-containing films forming compositions
View Patent ↗Disclosed are methods of using Group 4 transition metal azatrane precursors to deposit Group 4 transition metal-containing films on one or more substrates via vapor deposition processes.
1. A method of depositing of a Group 4 transition metal-containing film on a substrate, comprising the steps of:
(a) introducing into a reactor, having a substrate disposed therein, a vapor of a Group 4 transition metal-containing film forming composition comprising a Group 4 transitional metal-containing azatrane precursor having the following formula:
wherein M is selected from Group 4 transition metals consisting of Ti, Zr, or Hf; R is a Cp, alkyl or silyl substituted Cp, amidinate, or DAD; each R 1 is independently H or a C1 to C6 hydrocarbyl group; and each R 2 is independently a C1 to C6 hydrocarbyl group, and
(b) depositing at least part of the Group 4 transition metal-containing azatrane precursor onto the substrate.
2. The method of claim 1 , further comprising introducing at least one reactant into the reactor.
3. The method of claim 2 , wherein the reactant is selected from the group consisting of: O 2 , O 3 , H 2 O, H 2 O 2 , NO, N 2 O, NO 2 , oxygen radicals thereof, and mixtures thereof.
4. The method of claim 2 , wherein the reactant is a M′-containing precursor and the Group 4 transition metal-containing film is MM′ i O x , wherein i ranges from greater than 0 to 1; x ranges from 1 to 6; and M′ is selected from a Group 3 element, a different Group 4 element (i.e., M≠M′), a Group 5 element, a lanthanide, Si, Al, B, P or Ge.
5. The method of claim 4 , wherein the deposition is plasma enhanced.
6. The method of claim 4 , wherein R is Cp or alkyl- or silyl-substituted Cp.
7. The method of claim 4 , wherein the Group 4 transitional metal-containing azatrane precursor is Me 5 Cp-M((—N(Me)-CH 2 —CH 2 —) 3 N), Me 5 Cp-M((—N(iPr)—CH 2 —CH 2 —) 3 N), Cp-M((—N(Me)-CHMe—CH 2 —) 3 N), or Cp-M((—N(iPr)—CHMe—CH 2 —) 3 N).
8. The method of claim 2 , wherein the Group 4 transition metal-containing film forming composition and the reactant are introduced into the reactor simultaneously and the reactor is configured for chemical vapor deposition.
9. The method of claim 8 , wherein the deposition is plasma enhanced.
10. The method of claim 2 , wherein the Group 4 transition metal-containing film forming composition and the reactant are introduced into the chamber sequentially and the reactor is configured for atomic layer deposition.
11. The method of claim 2 , wherein the precursor is used to form a DRAM capacitor.
12. The method of claim 1 , wherein R is Cp or alkyl- or silyl-substituted Cp.
13. The method of claim 1 , wherein the Group 4 transitional metal-containing azatrane precursor is Me 5 Cp-M((—N(Me)-CH 2 —CH 2 —) 3 N), Me 5 Cp-M((—N(iPr)—CH 2 —CH 2 ) 3 N), Cp-M((—N(Me)-CHMe—CH 2 —) 3 N), or Cp-M((—N(iPr)—CHMe—CH 2 —) 3 N).