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Nano indium tin metal oxideIt has good conductivity and transparency, and can cut off harmful electronic radiation, ultraviolet radiation, and far-infrared radiation to the human body. Therefore, indium tin oxide is usually sprayed on glass, plastic, and electronic display screens as a transparent conductive film, while reducing harmful electronic radiation and ultraviolet and infrared radiation to the human body.
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Oxide conductive filmAmong them, In2O3 (ITO) film doped with Sn has the highest transmittance and the best conductivity, and is easy to etch fine patterns in acid solution, with a transmittance of over 90%. The transmittance and resistance of ITO are controlled by the ratio of In2O3 to SnO2, typically SnO2: In2O3=1:9。
The resistivity of ITO film layer is generally around 5 * 10E-4, preferably up to 5 * 10E-5, which is close to the resistivity of metals. In practical applications, the conductivity of ITO is often characterized by the block resistance, and its transmittance can reach over 90%. The transmittance and resistance of ITO film are controlled by the ratio of In2O3 to SnO2, respectively. Increasing the proportion of indium oxide can improve the transmittance of ITO, usually SnO2: In2O3=1: 9. Because the thickness of tin oxide exceeds 200&Ring; At that time, the transparency is usually not good enough - although the conductivity is good.
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The ITO glass used in high-end STN LCD displays has an R □ of about 10 Ω/□ and a film thickness of 100-200nm, while the ITO glass used in general low-end TN products has an R □ of 100-300 Ω/□ and a film thickness of 20-30nm.
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