Title :
Effect of process pressure on PVD AlN thin film
Author :
Xie, J.L. ; Wickramanayaka, S.
Author_Institution :
Inst. of Microelectron., Agency for Sci., Technol. & Res., Singapore, Singapore
Abstract :
PVD AlN film deposition rate, within wafer stress uniformity, roughness and crystal orientation were studied on different process pressure. It was found that AlN deposition rate decreased with pressure increased. The decreasing rate dramatically increased when process pressure more than 12mT. Film stress tends to be more tensile with increased pressure at wafer edge and becomes more compressive when process pressure higher than 14mT. Within wafer film stress range can be reduced from ~600MPa to ~300Mpa when process pressure increased from 7mT to 14mT. Film becomes more rough with process pressure increased. Roughness RMS increased from 2.605~2.825nm to 3.131~3.692nm when pressure increased from 7mT to 14mT.
Keywords :
III-V semiconductors; aluminium compounds; crystal orientation; semiconductor growth; semiconductor thin films; surface roughness; vacuum deposition; wide band gap semiconductors; AlN; PVD AlN thin film; compressive stress; crystal orientation; process pressure; roughness RMS; tensile stress; wafer stress uniformity; Crystals; Films; III-V semiconductor materials; Micromechanical devices; Sensors; Stress; Surface treatment;
Conference_Titel :
Electronics Packaging Technology Conference (EPTC), 2014 IEEE 16th
Conference_Location :
Singapore
DOI :
10.1109/EPTC.2014.7028262