Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films

Bruckner W, Baunack S, Elefant D, Reiss G (1996)
Journal of Applied Physics 79(11): 8516-8520.

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Abstract
The thin-film system Ni0.37Cr0.63/Cu0.57Ni0.42Mn0.01/Ni0.37Cr0.63 With a typical thickness of 1 mu m is used for low-ohmic precision resistors. The necessary adjustment of the temperature coefficient of resistance (TCR) by annealing has been studied by investigating the irreversible changes of the resistance during various annealing steps of NiCr/CuNi(Mn)/NiCr multilayers in comparison with single layers of CuNi(Mn) and NiCr. Auger depth profiles showed that the interdiffusion of CuNi(Mn) and NiCr results in an impoverishment of Ni in CuNi(Mn), explaining the TCR shift by comparison with data of Cu1-xNix bulk material. The decrease of the resistivity and the reduction of the width of the copper-nickel conductive layer by formation of a Ni0.6Cr0.2Cu0.2 interdiffusion zone phase (in accordance with the Cu-Ni-Cr phase diagram) cause a significant curvature of the resistance-temperature curve. As main result, it is shown that the NiCr base and cover layers and their interdiffusion with CuNi(Mn) play the decisive role in adjusting the TCR. It was checked that oxidation and topography effects have no remarkable influences. (C) 1996 American Institute of Physics.
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Bruckner W, Baunack S, Elefant D, Reiss G. Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films. Journal of Applied Physics. 1996;79(11):8516-8520.
Bruckner, W., Baunack, S., Elefant, D., & Reiss, G. (1996). Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films. Journal of Applied Physics, 79(11), 8516-8520.
Bruckner, W., Baunack, S., Elefant, D., and Reiss, G. (1996). Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films. Journal of Applied Physics 79, 8516-8520.
Bruckner, W., et al., 1996. Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films. Journal of Applied Physics, 79(11), p 8516-8520.
W. Bruckner, et al., “Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films”, Journal of Applied Physics, vol. 79, 1996, pp. 8516-8520.
Bruckner, W., Baunack, S., Elefant, D., Reiss, G.: Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films. Journal of Applied Physics. 79, 8516-8520 (1996).
Bruckner, W, Baunack, S, Elefant, D, and Reiss, Günter. “Adjustment of temperature coefficient of resistance in NiCr/CuNi(Mn)/NiCr films”. Journal of Applied Physics 79.11 (1996): 8516-8520.
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