Degradation of Ag/Si multilayers during heat treatments

Details Degradation of Ag/Si multilayers during heat treatments Degradation of Ag/Si multilayers during heat treatments

2009-02-12

arxiv.org/abs/0902.2045v1

Vacuum 72 (2004) 85

Physics

Condensed Matter

Materials Science

Scientific paper

Microstructure changes during annealing of nano-crystalline silver and amorphous silicon multilayers (Ag/a-Si) have been studied by X-ray diffraction and transmission electron microscopy. The dc-magnetron sputtered Ag/a-Si multilayers remained stable even after annealing at 523K for 10h, and microstructural changes occurred only above 600K. The degradation of Ag/a-Si multilayers can be described by the increase of size of Ag grains, formation of grooves and pinholes at Ag grain boundaries and by the diffusion of silicon atoms through the silver grain boundaries and along the Ag/a-Si interfaces. This results in thinning of a-Si layers, and in formation of Ag granulates after longer annealing times.

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