Interconnect structure and fabrication thereof
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United States of America Patent
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Nov 5, 2019
Grant Date -
Jan 25, 2018
app pub date -
Jul 11, 2017
filing date -
Jul 25, 2016
priority date (Note) -
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Abstract
Interconnect structures and processes generally include creating point defects in exposed surfaces of the dielectric layer to create a point defect region at a relatively shallow depth, wherein the point defect region is a fraction of the dielectric layer and is created with exposure to silicon, carbon, nitrogen, oxygen, or mixtures thereof such that the point defect region contains Si, C, N O, or mixtures containing at least one of the foregoing. A seed layer can be deposited and includes at least one alloying element that is effective to form an in situ self-aligned liner layer with the Si, C, N O, or mixtures containing at least one of the foregoing within the point defect region, which is formed at a depth of less than 10 nanometers. The in situ liner layer within the dielectric layer maximizes the volume fraction of the conductor of the interconnect structure.
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