Carbon-doped Cu films with self-forming passivation layer
Carbon-doped Cu films with self-forming passivation layer
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具有自形成钝化层的碳掺杂铜薄膜
DOI:
10.1016/j.surfcoat.2014.01.007
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发表时间:
2014-04
影响因子:
5.4
通讯作者:
Dong, C.
中科院分区:
文献类型:
--
作者:
Xu, L. Y.;Bao, C. M.;Chu, J. P.;Dong, C.
It was previously known that C-doping in Cu effectively enhances the film thermal stability and maintains a low electrical resistivity even upon high-temperature annealing, via a diffusion inhibiting the mechanism of C-stabilized oxide interlayer between Cu and Si. In the present work, the stability and resistivity are investigated in two Cu films doped with more C, respectively 2.9 at.% and 4.2 at.% as measured by EPMA. As expected, the thermal stability is even further enhanced, without significantly affecting the resistivity. After a systematic microstructural investigation by TEM, it is revealed that the relevant mechanism lies both in the enhanced stability via C dissolution in the silica native oxide layer at the Cu/Si interface and in the C-passivated Si surface zone beneath the layer. In the 4.2% C film, the Cu/Si interaction is mainly inhibited by self-forming SiC nano-particles and the resistivity remains below 3 μΩ·cm even upon annealing at 500 °C for 40 h. The C-doping can then be a simple process route towards manufacturing stable Cu interconnects.
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影响因子:
2.1
作者:
Zhang, X. Y.;Chu, J. P.;Wang, Q.;Dong, C.
通讯作者:
Dong, C.
影响因子:
4
作者:
J. Chu;C. Lin
通讯作者:
J. Chu;C. Lin
影响因子:
1.4
作者:
K. Barmak;C. Cabral;K. Rodbell;J. Harper
通讯作者:
K. Barmak;C. Cabral;K. Rodbell;J. Harper
影响因子:
2.1
作者:
R. Hübner;M. Hecker;N. Mattern;V. Hoffmann;K. Wetzig;C. Wenger;H. Engelmann;C. Wenzel;E. Zschech;J. Bartha
通讯作者:
R. Hübner;M. Hecker;N. Mattern;V. Hoffmann;K. Wetzig;C. Wenger;H. Engelmann;C. Wenzel;E. Zschech;J. Bartha
影响因子:
2.1
作者:
J. Chu;C. Lin;Y. Y. Hsieh-Y.
通讯作者:
J. Chu;C. Lin;Y. Y. Hsieh-Y.