InGaAs/Si3N4 interface obtained in ultrahigh vacuum multipolar plasma: In-situ control by ellipsometry and electrical characterization |
| |
Authors: | P Boher M Renaud JM Lopez-Villegas J Schneider JP Chane |
| |
Institution: | Laboratories d'Electronique et de Physique Appliquée (LEP), 3 Avenue Descartes, F-94451, Limeil - Brévannes Cedex, France |
| |
Abstract: | A multipolar plasma passivation scheme controlled by in-situ ellipsometry has been developed to produce a high electrical quality InGaAs/Si3N4 interface. We have demonstrated the possibility to remove all native oxides at the InGaAs surface by heating the sample at 240°C, then using the action of a multipolar H2 plasma at 185°C, without optical degradation of the surface. The passivation by a native nitride layer is then performed using a N2 plasma, and Si3N4 is deposited. The treatment induces a reduction of the density of interface states Nss(E), and also a change of the nature of these interface states as shown by a reduction in the capture cross section σn(E). |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|