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Low k dielectric materials with inherent copper ion migration barrier










Image Number 3 for United States Patent #6730618.

An interlayer dielectric for preventing Cu ion migration in semiconductor structure containing a Cu region is provided. The interlayer dielectric of the present invention comprises a dielectric material that has a dielectric constant of 3.0 or less and an additive which is highly-capable of binding Cu ions, yet is soluble in the dielectric material. The presence of the additive in the low k dielectric allows for the elimination of conventional inorganic barrier materials such as SiO.sub.2 or Si.sub.3 N.sub.4.








 
 
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