ArticleACS applied materials & interfaces2025
Broad Beam Plasma Enhanced Low-Temperature Growth of Oriented Aluminum Nitride Thin Films.
Article in ACS applied materials & interfaces, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Aluminum nitride (AlN) thin films with (0002) orientation have exceptional piezoelectric and optoelectronic properties for various applications. It remains challenging to grow highly oriented AlN films at low temperature (e.g., below 200 °C) using conventional magnetron sputtering. This study introduces a broad beam ion source-enhanced pulsed DC magnetron sputtering, which enables the growth of (0002) preferentially oriented polycrystalline AlN films at room temperature. The effects of the ion energy and ion flux on surface roughness, crystal orientation, and piezoelectric properties are systematically studied. The film crystallinity is significantly improved under an optimum ion energy; X-ray diffraction shows that the full width at half-maximum (FWHM) of the (0002) peak decreases from 0.7298 to 0.3751°. The average surface roughness is reduced from 2.65 to 0.95 nm. The effective piezoelectric
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