LED Chip Structure

LED chip structure: I recently read a lot of LED chip -related information, briefly introduce the structure and manufacturing process of the LED chip to help understand the development of LED -related companies and the development prospects. The LED chip contains a total of two main contents, one is the LED extension film -the sapphire substrate below in the figure above and the Nitrodes (GAN) buffer layer on the substrate; And PN electrode layer. Therefore, LED chips involve three production processes: glowing extension sheet growth, chip growth and manufacturing, chip packaging. Among the three processes above, the growth technical content of the outer slices is high, the chip manufacturing is second, and the packaging is second. The LED module is to arrange the LED (light -emitting diode) in accordance with certain rules and encapsulate it. The LED outer extension sheet wholesale, plus some waterproof processing products, is the LED module. According to sealing, it can be divided into two types: waterproof and non -waterproof. Waterproofing and non -waterproof modules are mainly distinguished by the application environment. Generally, waterproof LED modules can be used for outdoor lighting and promotional use. How much is LED extension? Environmental applications, not waterproof modules are mainly used indoors. According to the shape of the LED, the LED module is divided into: direct -inserted LED module, 食 食 食 LED module, patch LED module. LED chip size is divided into small power chips, medium -power chips and high -power chips according to power can be divided into small power chips. According to customer requirements, it can be divided into single -tube level, digital level, dot matrix level, decoration lighting and other categories. As for the specific size of the chip, it depends on the actual production level of different chip manufacturers. There is no specific requirements. As long as the process passes, small chips can increase the output of the unit and reduce the cost. Zhanjiang LED extension film and photoelectric performance will not change fundamentally. The use current of the chip is actually related to the current density of flowing through the chip. The chip uses small current, the chip ambassador is large, LED extension film manufacturers, their unit current density is almost the same as. Considering that heat dissipation is the main problem under large current, its light emitting efficiency is lower than that of small currents. On the other hand, due to the increase in area, the body resistance of the chip will decrease, so the positive direction voltage will decrease. Back to the previous step to print this page