Gas Diffusion Barriers Prepared by Spatial Atmospheric Pressure Plasma Enhanced ALD.

In this work, we report on aluminum oxide (AlO) gas permeation barriers prepared by spatial ALD (SALD) at atmospheric pressure. We compare the growth characteristics and layer properties using trimethylaluminum (TMA) in combination with an Ar/O remote atmospheric pressure plasma for different substrate velocities and different temperatures. The resulting AlO films show ultralow water vapor transmission rates (WVTR) on the order of 10 gmd.