Decomposition and Uniformity of Material Gases in GaN MOVPE

The characteristics of metalorganic vapor-phase epitaxy (MOVPE)-grown GaN layers have been compared with the chemical features of the gaseous phase during growth. The chemical features were evaluated by growth simulation. Two- and three-flow methods were used for GaN MOVPE. It was found both by growth and by simulation that the two-flow is superior to the three-flow method as regards uniformity and quality of the GaN layers.