Patent ID: 6617690
Filing Date: 2003-09-09
Classification: H01L

Abstract:
An interconnect structure comprising:one or more first interconnect levels, one on top of each other, each level comprising a first layer having a coefficient of thermal expansion (CTE) greater than about 20 parts per million (ppm) and a first internal stress associated therewith, the first layer having a first set of metallic lines formed therein; one or more second interconnect levels, one on top of each other, each level comprising a second layer having a CTE less than about 20 ppm and a second internal stress associated therewith, the second layer having a second set of metallic lines formed therein; and one or more stress adjustment cap layers formed between the first layer and the second layer, the cap layer having a third internal stress selected to offset the first internal stress of the first layer and the second internal stress of the second layer and induce a favorable relief of stress on the interconnect structure.