In situ reaction mechanism studies on ozone-based atomic layer deposition of Al(2)O(3) and HfO(2).
The mechanisms of technologically important atomic layer deposition (ALD) processes, trimethylaluminium (TMA)/ozone and tetrakis(ethylmethylamino)hafnium (TEMAH)/ozone, for the growth of Al(2)O(3) and HfO(2) thin films are studied in situ by a quadrupole mass spectrometer coupled with a 300 mm ALD reactor. In addition to released CH(4) and CO(2), water was detected as one of the reaction byproduct in the TMA/O(3) process. In the TEMAH/O(3) process, the surface after the ozone pulse consisted of chemisorpted active oxygen and -OH groups, leading to the release of H(2)O, CO(2), and HNEtMe during the metal precursor pulse.
Rose
Martin
M
Niinistö
Jaakko
J
Endler
Ingolf
I
Bartha
Johann W
JW
Kücher
Peter
P
Ritala
Mikko
M