Atom probe tomography of GaAs homointerfaces fabricated by surface-activated bonding

Abstract

Elemental distribution around GaAs homointerfaces fabricated by surface-activated bonding (SAB) is examined by atom probe tomography (APT). Our APT detected small amount of contaminants accidentally introduced on the SAB interfaces. We confirmed that As-deficient intermediate layer at the as-bonded interfaces was recovered by post-bonding annealing.