12-01-2017 дата публикации
Номер: US20170011987A1
Techniques are disclosed for forming a through-body-via (TBV) in a semiconductor die. In accordance with some embodiments, a TBV provided using the disclosed techniques includes a polymer-based barrier layer and an electrically conductive seed layer formed by applying an electrically conductive ink directly to the barrier layer and then curing it in situ. In some embodiments, after curing, the resultant seed layer may be a thin, substantially conformal, electrically conductive metal film over which the TBV interconnect metal can be deposited. In some example cases, a polyimide, parylene, benzocyclobutene (BCB), and/or polypropylene carbonate (PPC) barrier layer and an ink containing copper (Cu) and/or silver (Ag), of nanoparticle-based or metal complex-based formulation, may be used in forming the TBV. In some instances, the disclosed techniques may be used to address poor step coverage, low run rate, and/or high cost issues associated with existing physical vapor deposition (PVD)-based far-back-end-of-line (FBEOL) processes. 1. An integrated circuit comprising:a semiconductor layer; and an electrically conductive interconnect; and', 'a polymer-based barrier layer disposed between the interconnect and the semiconductor layer., 'a through-body via (TBV) formed within the semiconductor layer, the TBV comprising2. The integrated circuit of claim 1 , wherein the semiconductor layer comprises at least one of silicon (Si) and/or silicon germanium (SiGe) claim 1 , and wherein the interconnect comprises at least one of copper (Cu) claim 1 , nickel (Ni) claim 1 , cobalt (Co) claim 1 , and/or a combination of any one or more thereof3. The integrated circuit of further comprising an electrically conductive seed layer disposed between the interconnect and the polymer-based barrier layer.4. The integrated circuit of claim 3 , wherein the seed layer comprises at least one of copper (Cu) claim 3 , silver (Ag) claim 3 , and/or a combination of any one or more thereof.5. The ...
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