Effect of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) on Cu/Ta chemical mechanical planarization (CMP) in the barrier layer: A novel complexing agent and the dual role on Cu
Ni Meng, Xianglong Zhang, Shunfan Xie, Xianghui Li, Shenao Nie, Yuxuan Qiu, Ying Wei, Junfeng Li, Ruhao Meng, Yangang He
Topics & Concepts
Chemical-mechanical planarizationMaterials scienceZeta potentialCopperSlurryTantalum carbideChemical engineeringTantalum nitrideBarrier layerCitric acidTantalumX-ray photoelectron spectroscopyChelationNuclear chemistrySolubilityLayer (electronics)Inorganic chemistryMetallurgyNanoparticleNanotechnologyComposite materialOrganic chemistryChemistryEngineeringAdvanced Surface Polishing TechniquesCopper Interconnects and ReliabilitySemiconductor materials and devices