Title :
p-Type AuMn ohmic contact on GaAs: integration in a HBT processing technology
Author :
Dubon-Chevallier, C. ; Duchenois, A.M. ; Papadopoulo, A.C. ; Bricard, L. ; Héliot, F. ; Launay, P.
Author_Institution :
Centre National d´´Etudes des T?l?communications, Laboratoire de Bagneux, 196 avenue Henri Rav?ra, 92220 Bagneux, FRANCE
Abstract :
The influence of the p-type doping level in GaAs on the AuMn specific contact resistivity has been investigated, showing that AuMn could be used as an ohmic contact on epitaxial layers with a very large range of doping levels. The integration of this contact in the processing technology of heterojunction bipolar integrated circuits has been analysed, showing the influence of the processing steps preceding the contact evaporation. The contact resistivity has been found to be very sensitive to defects created by ion beam etching, making necessary a light chemical etch before depositing the contact.
Keywords :
Bipolar integrated circuits; Chemical technology; Conductivity; Doping; Epitaxial layers; Etching; Gallium arsenide; Heterojunction bipolar transistors; Integrated circuit technology; Ohmic contacts;
Conference_Titel :
Solid State Device Research Conference, 1990. ESSDERC '90. 20th European
Conference_Location :
Nottingham, England
