Scalable methods for ultra-smooth platinum in nanoscale devices

Autor: Charmaine Chia, Stefanie S. Jeffrey, Roger T. Howe
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: Micro and Nano Engineering, Vol 3, Iss , Pp 50-58 (2019)
Druh dokumentu: article
ISSN: 2590-0072
DOI: 10.1016/j.mne.2019.04.002
Popis: Ultra-smooth metal structures are increasingly important in nanoscale device applications, from photonics to molecular electronics and 2D material growth. We describe three methods for achieving ultra-smooth platinum: patterned template stripping, chemical mechanical polishing and giant grain growth. Specifically, we demonstrate 1) the first use of spin-on glass as an adhesive for the transfer of a patterned platinum film via template stripping, enabling the film to be exposed to harsher solvents and at higher temperatures; 2) an updated CMP process for platinum with slurry materials that are currently available; 3) a giant grain growth process on a 4″ quartz substrate that uses a thinner Pt film than previously reported. Overall, root mean squared film roughness was decreased from ~14 Å for as-deposited platinum to
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