期刊
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS BRIEF COMMUNICATIONS & REVIEW PAPERS
卷 46, 期 6A, 页码 3537-3544出版社
INST PURE APPLIED PHYSICS
DOI: 10.1143/JJAP.46.3537
关键词
whisker; ITO; indium oxide; DC magnetron sputtering; transition mode; supersaturation; VLS growth mechanism
Whisker structures of indium tin oxide were prepared on a glass substrate by conventional sputtering using an indium-tin alloy target. Whisker structures grew well at higher temperatures than the crystallization temperature of In2O3 and the melting temperature of the In-Sn alloy, and also under the sputtering conditions of comparatively scarce oxygen and a high sputtering rate. These sputtering conditions correspond to the transition mode of reactive sputtering. The whisker structures were categorized into a structure consisting of many needles and a structure consisting of many trunks with side branches. Each whisker was a bcc single crystal growing along the (222) direction and had a spherical droplet-like structure on the tip. Consequently, it was revealed that In-Sn droplets acted as important cores of whisker growth. The indium tin oxide (ITO) whiskers were grown by a self-catalytic vapor-liquid-solid mechanism promoted by the supersaturation of indium vapor.
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