Methods for atomic layer deposition of SiCO(N) using halogenated silylamides
Methods for the formation of films comprising Si, C, O and N are provided. Certain methods involve sequential exposures of a hydroxide terminated substrate surface to a silicon precursor and an alcohol-amine to form a film with hydroxide terminations. Certain methods involved sequential exposures of hydroxide terminated substrate surface to a silicon precursor and a diamine to form a film with an amine terminated surface, followed by sequential exposures to a silicon precursor and a diol to form a film with a hydroxide terminated surface.
1. A method of depositing a film comprising Si, C, O and N, the method comprising:
exposing a substrate surface to a silicon precursor to form a film with silicon-halogen terminations, wherein the silicon precursor comprises a halogenated silyl amide, the silicon precursor comprises a compound having the general formula X n Si(NRR′) (4-n) , where n is 1-3, each X is independently F, Cl, Br or I, each of R and R′ is an alkyl having in the range of 5 to 8 carbon atoms or an aryl having in the range of 1 to 8 carbon atoms; and
exposing the film with silicon-halogen terminations to an alcohol-amine to form a film comprising —OH terminations.
2. The method of claim 1 , wherein the silicon precursor comprises substantially no Si—C bonds.
3. The method of claim 1 , wherein each X is selected from Br or I.
4. The method of claim 1 , wherein the alcohol-amine has a general formula H 2 N—R″—OH, where R″ is an alkyl, alkyenyl or alkynyl group having in the range of 1 to 16 carbons atoms.
5. The method of claim 4 , wherein R″ has in the range of 2 to 8 carbon atoms.
6. The method of claim 5 , wherein R″ has in the range of 2 to 4 carbon atoms.
7. The method of claim 5 , wherein R″ has in the range of 4 to 8 carbon atoms.
8. The method of claim 1 , further comprising repeating exposures to the silicon precursor and alcohol-amine to form a film having a predetermined thickness.
9. A method of depositing a film comprising Si, C, O and N, the method comprising:
exposing a substrate surface to a silicon precursor to form a film with silicon-halogen terminations, wherein the silicon precursor comprises a halogenated silyl amide, the silicon precursor comprises a compound having the general formula X n Si(NRR′) (4-n) , where n is 1-3, each X is independently Br or I, each of R and R′ is an alkyl having in the range of 5 to 8 carbon atoms or an aryl having in the range of 1 to 8 carbon atoms; and
exposing the film with silicon-halogen terminations to an alcohol-amine to form a film comprising —OH terminations, the alcohol-amine has a general formula H 2 N—R″—OH, where R″ is an alkyl, alkenyl or alkynyl group having in the range of 1 to 8 carbons atoms.
10. The method of claim 9 , further comprising repeating exposures to the silicon precursor and alcohol-amine to form a film having a predetermined thickness.