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José J. Rodríguez
University of Missouri - Columbia
Advisors: Dr. Mark Prelas and Dr. Tushar Ghosh
Abstract
In this project we have report that ohmic contact in diamond has been achieve in tool, optical and single crystalline diamond. Two recipes were examined consecutive layers of titanium, platinum and gold and consecutive layers of nickel and gold. Both of the recipes have show linear and near linear Ohmic contacts after been anneal at a temperature of more than 500?C, but both of them have had their own strengths and weakness. The I-V characteristic has been investigated using a prove station and applying a voltage of -25 to 25 volts through a pair of tungsten needles. The titanium, platinum and gold recipe showed a more linear ohmic contact when compare with the nickel and gold recipe, but higher total resistance compare with the Ni/Au recipe. On the other hand, the nickel and gold recipe present migration of the nickel with the gold which presents a problem to be able to permanently attach leads by wire bonding
Jose Rodriguez was born in Ponce, Puerto Rico in 1975. He obtained the degrees of Master Science Electrical Engineering and Bachelor Science Electrical Engineering in 2004 and 1998, respectively. He is a PhD Candidate in the Nuclear Institute at the University of Missouri. His main interests are in the areas of detectors, materials, and radiation protection.
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