Effect of oxygen content in Tin Oxide thin film deposition on Silicon substrates using a sheet plasma negative ion source
Abstract
Tin oxide (SnO2) thin films were synthesized on Si(111) substrates through plasma-enhanced chemical vapor deposition using a magnetized sheet plasma negative ion source. Thin films were deposited through reactive dc sputtering where a tin target, applied with a negative bias and enhanced by a magnet set-up, was sputtered by argon plasma and reacted with O2 plasma. The oxygen gas content was varied from 3:100 to 12:100 O2:Ar gas, setting all other parameters constant. X-ray diffraction analysis shows that as the O2 content decreases the degree of crystallinity of the thin films improve. Thin films obtained different SnO2 textures, i.e. (110), (101), and (002). SEM results show the changes in surface morphology and the decrease in film thickness at lower oxygen content.