Abstract
Recent papers on amorphous germanium films have indicated that both contact and substrate material may play a crucial role in determining the structure, and hence the resistivity, of deposited films particularly during anneal. Electron diffraction and resistivity results are presented on the effect of various contact materials on the properties of amorphous germanium, silicon and boron films. It is found that noble metal contacts cause crystallization of the amorphous film; resistivity results using these contacts during anneal showed an irreversible increase in the film resistivity. Resort to refractory metal contacts increased the crystallization temperature, enabling reversible resistivity-temperature curves to be obtained.
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