Specific Process Knowledge/Thin film deposition/Deposition of TiW/Sputtering of TiW in Wordentec/Grain size and uniformity of TiW layers

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Grains and uniformity of a sputtered TiW film

TiW films were deposited by sputtering in the Wordentec. AFM pictures show how the surface roughness is dependent on the process parameters.

For the sputter process, the power and argon pressure can be set to different values. Depending on the process parameters, the deposited layers will have different characteristics: the roughness, grain size and uniformity may be different.

Power: 150 W, pressure: 1*10^-3 mbar

With use of the settings 150W and 1*10^-3 mbar, a surface with low roughness is deposited.

AFM picture of sputter deposited TiW. Used settings: 150W and 1*10^-3 mbar.

Measurement done September 2008, KNIL.