Electrical characterization of Ag:TiN thin films produced by glancing angle deposition

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Paulo Pedrosa (Author) FEUP; C. Lopes (Author) Other; N. Martin (Author) Other; José Carlos Fonseca (Author) FEUP; F. Vaz (Author) Other

Journal

Title: Materials Letters

Vol. 115

Pages: 136-139

ISSN: 0167-577X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 24 Citations

ISI Web of Science

Scopus - 24 Citations

Scientific classification

FOS: Engineering and technology > Materials engineering

CORDIS: Technological sciences > Engineering > Biomaterial engineering

Associated Projects

WICKEEG - Um novo eletrodo para EEG baseado num polímero poroso para registo de EEG: do desenvolvimento dos materiais até aos testes in-vivo

Other information

Authenticus ID: P-008-GDG

DOI: 10.1016/j.matlet.2013.10.044

Abstract (EN): Columnar Ag:TiN thin films were prepared by d.c. magnetron sputtering with a Ag content of similar to 10 at.% on silicon and glass substrates. The Glancing Angle Deposition, GLAD, technique was implemented to transform the typical columnar microstructure into the desired inclined, zigzag and spiral profiles. A periodic variation of the angle of incidence 'alpha' (40 degrees, 60 degrees and 80 degrees) was applied to deposit Ag:TiN thin films with inclined, zigzag and spiral microstructures. The film's electrical properties were studied. Higher alpha values lead to more porous microstructures with column angle beta varying from 13 degrees (alpha=40 degrees) to 30 degrees (alpha=80 degrees) for 8 zigzags. Resistivity, rho, at 293 K or versus temperature was found to be connected to the porosity and beta angles. The more compact films exhibited lower and more stable resistivity values than the more porous ones. Ag segregation and TiN columnar oxidation are favored by temperature and were also found to depend on the produced architectures.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4