TITLE

Interaction of a Ti-capped Co thin film with Si[sub 3]N[sub 4]

AUTHOR(S)
Li, Hua; Hua Li; Bender, Hugo; Conard, Thierry; Maex, Karen; Gutakovskii, Anton; Van Landuyt, Jozef; Froyen, Ludo
PUB. DATE
December 2000
SOURCE
Applied Physics Letters;12/25/2000, Vol. 77 Issue 26
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The reaction of a Ti (8 nm) capped Co film (15 nm) with a Si[sub 3]N[sub 4] layer (150 nm) is studied after rapid thermal annealing at 660 °C for 120 s in a N[sub 2] ambient. X-ray photoelectron spectroscopy, transmission electron microscopy, electron energy-loss spectroscopy, and Auger electron spectroscopy are used to study the reaction products. Combining the results of the different analyses yields a layer stack consisting of: TiO[sub 2]/TiO/unreacted Co/(Ti,Co)[sub 2]N/Co[sub 2]Si, followed by amorphous Si[sub 3]N[sub 4]. The reaction mechanisms are discussed. Conclusions concerning the risk for degradation of nitride spacers in advanced devices are drawn. © 2000 American Institute of Physics.
ACCESSION #
4414867

 

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