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In page Indium:

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Indium is used primarily in the production of flat-panel displays as indium tin oxide (ITO), a transparent and conductive coating applied to glass.[citation needed] It is also used in the semiconductor industry, in low-melting-point metal alloys such as solders and soft-metal high-vacuum seals.[citation needed] It is produced exclusively as a by-product during the processing of the ores of other metals, chiefly from sphalerite and other zinc sulfide ores.[citation needed]