In order to improve the light output efficiency of LED chips , people have thought of many ways. For example, there are many LEDs with higher brightness ITO chips on the market. If ITO is used instead of Ni/Au as the P-type electrode chip, the brightness of the GaN-based white LED is 20%-30% higher than that of the chip using the common electrode.
ITO is the abbreviation of English Indium Tin Oxides, which means "indium tin oxide". ITO has good chemical and thermal stability compared to other transparent semiconductor conductive films. Good adhesion to the substrate and graphic processing characteristics.
ITO is an N-type oxide semiconductor. As a nano-indium tin metal oxide, it has excellent electrical conductivity and transparency, and can cut off electron radiation, ultraviolet rays and far infrared rays harmful to the human body. Therefore, after spraying on glass, plastic and electronic display screens, it cuts off electron radiation and ultraviolet and infrared rays harmful to the human body while enhancing conductivity and transparency. The ITO transparent conductive film is an important component on the flat panel display, and its characteristics are closely related to the parameters and materials in the coating process.
Among many materials that can be used as transparent electrodes, ITO (Indium Tin Oxide) is the most widely used one. The ITO film is an indium tin oxide semiconductor transparent conductive film, which usually has two performance indicators: resistivity and transmittance. . Mainly because ITO can have low resistivity and high light transmittance at the same time, it meets the requirements of good conductivity and light transmittance. Among the oxide conductive films, the Sn-doped In2O3 (ITO) film has the highest transmittance and the best electrical conductivity, and it is easy to etch a fine pattern in the acid solution.
If we look at its penetration rate, its transmittance has reached more than 90%. The transmittance and resistance of ITO are controlled by the ratio of In2O3 and Sn2O3, respectively. The ratio is usually Sn2O3:In2O3=1:9.
USB 2.0 is a USB interface standard released in 2000 with a theoretical maximum transmission speed of 480Mbps (about 60MB/s). The port has four cables (five cables for MicroUSB and MiniUSB), and the maximum output current is 0.5A. USB 2.0 is currently the most common version of USB port, almost all computers have USB 2.0 port, most USB devices also support USB 2.0. USB 2.0 hub. The device can provide USB high speed or full speed connection on the uplink port. The device also provides USB high-speed, full-speed, or low-speed connections on the downlink port. When the uplink port is connected to an electrical environment that supports only high-speed, full-speed, and low-speed connections, the high-speed, full-speed, and low-speed USB connections on the downlink port are enabled. When the uplink port is connected to an electrical environment that supports only full or low speed connections, the USB high-speed connection on the downlink port is disabled. USB 3.0 Hubs is higher than usb 2.0 in terms of transmitting data.
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