Graduate Thesis Or Dissertation
 

Percussive welding of metal-semiconductor contacts

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  • Application of automatic production techniques to the fabrication of semiconductor devices has been somewhat limited by the requirements of conventional alloying techniques. These alloying techniques require an excessive amount of individual handling. This thesis investigates the feasibility of applying percussive welding to the fabrication of metal-semiconductor contacts, as a solution to the problem of handling. The theory and technology of metal-semiconductor alloyed contacts, including both rectifying and ohmic contacts, is presented to determine the requirements for fabricating such contacts. These requirements were met by determining the parameters controlling the percussive welding process. The parameters were then optimized by the combination of theoretical and empirical methods. Ohmic and rectifying contacts were fabricated by the percussive welding of gold and aluminum wires on silicon and germanium semiconductor materials.
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