Ammonium persulfate and potassium oleate containing silica dispersions for chemical mechanical polishing for cobalt interconnect applications

CK Ranaweera, NK Baradanahalli… - ECS Journal of Solid …, 2018 - iopscience.iop.org
We investigated the suitability of ammonium persulfate (APS) and potassium oleate (PO)
containing silica dispersions for polishing Co interconnects based on removal and …

1-nm-thick graphene tri-layer as the ultimate copper diffusion barrier

BS Nguyen, JF Lin, DC Perng - Applied Physics Letters, 2014 - pubs.aip.org
We demonstrate the thinnest ever reported Cu diffusion barrier, a 1-nm-thick graphene tri-
layer. X-ray diffraction patterns and Raman spectra show that the graphene is thermally …

Post-CMP cleaning solutions for the removal of organic contaminants with reduced galvanic corrosion at copper/cobalt interface for advanced Cu interconnect …

J Seo, SH Vegi, SV Babu - ECS Journal of Solid State Science …, 2019 - iopscience.iop.org
It has been difficult to remove BTA-related organic residues (BTA, Cu-BTA, and Co-BTA
complexes) and silica abrasives from various surfaces during post Cu-CMP cleaning when …

Cleaning solutions for ultrathin Co barriers for advanced technology nodes

SR Alety, URK Lagudu, R Popuri… - ECS Journal of Solid …, 2017 - iopscience.iop.org
Co, a candidate material for barrier and capping layers in 10 nm and smaller Cu
interconnects, is prone to corrosion and galvanic corrosion during chemical mechanical …

Direct-liquid-evaporation chemical vapor deposition of smooth, highly conformal cobalt and cobalt nitride thin films

J Yang, K Li, J Feng, RG Gordon - Journal of Materials Chemistry C, 2015 - pubs.rsc.org
By a direct-liquid-evaporation chemical vapor deposition (DLE-CVD) method, we deposited
smooth low-resistance cobalt (Co) and cobalt nitride (CoxN) thin films with excellent …

Investigation of persulfate oxidizers in Co CMP slurry through Co surface adsorption and oxidation behaviors

ES Jung, JH Choe, CY Lee, JU Yoo, TM Choi… - Applied Surface …, 2025 - Elsevier
With the apparent miniaturization trends in interconnection materials, cobalt (Co) is
emerging as a promising interconnect metal. This study suggests persulfate chemicals …

Precursor-based designs of nano-structures and their processing for Co (W) alloy films as a single layered barrier/liner layer in future Cu-interconnect

H Shimizu, K Shima, Y Suzuki, T Momose… - Journal of Materials …, 2015 - pubs.rsc.org
The drive to continuously downscale Cu interconnects in ultra-large-scale integrated (ULSI)
devices requires strategic improvements in materials and their design processes. For …

Synthesis, characterization, and thermal properties of cobalt (II) compounds with guanidinate ligands

Y Zhang, L Du, X Liu, Y Ding - New Journal of Chemistry, 2018 - pubs.rsc.org
Two cobalt (II) guanidinate compounds of the general type [((R) 2NC (iPrN) 2) 2Co](R= Me,
SiMe3) were synthesized and characterized by elemental analysis, 1H NMR, and single …

Role of W and Mn for reliable 1X nanometer-node ultra-large-scale integration Cu interconnects proved by atom probe tomography

K Shima, Y Tu, H Takamizawa, H Shimizu… - Applied Physics …, 2014 - pubs.aip.org
We used atom probe tomography (APT) to study the use of a Cu (Mn) as a seed layer of Cu,
and a Co (W) single-layer as reliable Cu diffusion barriers for future interconnects in ultra …

Study on the adhesion strength of CVD-Cu films with ALD-Co (W) underlayers made using amidinato precursors

K Shima, H Shimizu, T Momose… - ECS Journal of Solid …, 2014 - iopscience.iop.org
We investigated the adhesion strength of Cu films grown using chemical vapor deposition
(CVD) on a Co (W) layer, which was grown using atomic layer deposition (ALD), for Cu …