Characterization of PT thin films deposited by DC sputtering at different temperatures on Ti/glass and TiO2/Si substrates

• Published in: Ferroelectrics Vol. 225; no. 1; pp. 319 - 325
• Main Authors: Cruz, Ma de la Paz, Siqueiros, Jesús M., Valenzuela, Jose, Machorro, Roberto, Portelles, Jorge J., Fundora, Abel
• Format: Journal Article
• Language: English
• Published: Taylor & Francis Group 01-03-1999
• Subjects: ferroelectric electrodes; platinum
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150199908009141

Pt thin films were deposited on Ti/Glass and TiO
2
/Si substrates by DC sputtering at temperatures between room and 700°C to optimize its performance as electrodes for ferroelectric devices. Well oriented films in the (111) direction were obtained. Auger electron spectroscopy showed the presence of Ti on the surface of both systems: Pt/Ti/Glass and Pt/TiO
2
/Si, evidencing a diffusion of Ti through the Pt film. STM studies showed an increase in grain size with temperature up to 600°C. Terraces and steps can be observed above this temperature for Pt films on Ti substrates: and a combination of big and small grains for Pt on TiO
2
. The spectroellipsometric studies evidenced a decrease in the packing density of the films as the temperature was risen. Good adherence of Pt is observed for both substrates.