Al‐0.9% Si/Si Ohmic Contacts to Shallow Junctions

Abstract
We have studied the contact resistance between Al‐0.9% Si and both n+ and p+ Si. The test vehicle utilized in this study was a four‐terminal Kelvin resistor believed to be an adequate means for providing accurate values for the contact resistance. We have conducted a statistical study of the contact resistance. Van der Pauw sheet resistivity measurements and SIMS studies were also performed for the purpose of characterizing the surface dopant concentration.