Metal–Dielectric Diffusion Processes: Fundamentals
Metal–Dielectric Diffusion Processes: Fundamentals
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金属-电介质扩散过程:基础知识
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
T. Lu
中科院分区:
文献类型:
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作者:
M. He;T. Lu
There are two main mechanisms by which metal species can migrate into dielectrics. One is diffusion of metal atoms at an elevated temperature driven by the metal concentration gradient. The other is drift of metal-ions as a result of an external electric field. In the latter case, metal-ions have to be generated at the metal–dielectric interface for the drift to begin. The origin of metal-ion generation is related to the chemical interaction between the metal and the dielectric at their interface. For example, a metal oxide may be formed if there is an oxidant residing at the interface. In this chapter, we attempt to describe a coherent treatment of ion generation and drift based on the thermochemistry that occurs at the metal–dielectric interface. The basic formulation of atomic diffusion and ionic drift is reviewed.