Recently, according to experts from China Epoxy Resin Industry Association (), LED epoxy resin (epoxy) packaging technology was introduced. The expert first stated that the epoxy used in the LED production process is one of the key points in the LED industry. Epoxy resin is a kind of organic polymer compound which contains two or more epoxy groups in a molecule, and their relative molecular qualities are not high except for a few. The molecular structure of the epoxy resin is characterized by the presence of an active epoxy group in the molecular chain, and the epoxy group may be located at the end, in the middle or in a ring structure of the molecular chain. Since the molecular structure contains an active epoxy group, they can be cross-linked with various types of curing agents to form an insoluble, infusible polymer having a three-dimensional network structure. In order to protect the airtightness of the die, protect the die from external corrosion, prevent moisture from entering the outside, and mechanically support the wires, effectively discharge the heat generated inside, and prevent the electronic components from being mechanically vibrated. The impact is broken, resulting in a change in the characteristics of the component, using different shapes and material properties (with or without a dispersant), functioning as a lens or diffusing lens, providing a form that can be held by hand.
Led hardening temperature and time with sealing resin is a very important topic. According to the experts of China Epoxy Resin Industry Association (), the main points include the following aspects: Generally, the hardening agent for sealing resin for LED is acid anhydride, and the hardening temperature is about 120~130 °C; The hardening time is shortened after the accelerator is added. Regarding the hardening time and the phenomenon of hardening and hardening rate, the expert further stated that the thermal conductivity of the resin is small, the internal hardening heat accumulation affects the hardening rate (reaction rate), and the inner (hardening heat) outside (oven) high heat displycase is easily deformed. The expert said that it is necessary to pay attention to another point. The blending ratio and characteristics of D?D resin and hardener: The amount of hardener used depends on the required properties. When the blending ratio of the hardener is small, the hardness of the hardened material is hard and yellow. When the compounding ratio of the hardener is large, the hardened material becomes brittle and the coloring is small. For tg?D?D glass transfer points? D?D and hdt (heat distortion temperature), experts from China Epoxy Resin Industry Association () continue to introduce three technical points? D? D test method: tma, dsc.b: the temperature difference between the two is 2~3 °C; the tg becomes higher after adding the filler; the electrical properties of the epoxy resin (insulation resistance rate and the loss rate of the induced electric loss) are low The deformation temperature is consistently high.
The epoxy resin used for constituting the envelope must have moisture resistance, insulation, and mechanical strength, and has a high refractive index and transmittance for light emitted from the LED. According to experts from China Epoxy Resin Industry Association (), the choice of encapsulation materials with different refractive indices, the influence of package geometry on photon and escape efficiency is different, and the angular intensity of luminous intensity? It is also related to the die structure, the light output mode, and the material and shape used to package the lens. If a pointed resin lens is used, the light can be concentrated to the axial direction of the LED, and the corresponding viewing angle is small; if the resin lens at the top is circular or planar, the corresponding viewing angle will increase. As a kind of light-emitting device with long service life and low energy loss, LED has been in the country for 20 years. Due to its special performance superiority, it is gradually replacing the original light-emitting device and used in industrial and civil use. Every corner. Especially with the shortage of human energy, the market prospects are very impressive. In recent years, LED has become more and more widely used in urban lighting engineering, industrial, and civil construction industries. According to the CCTV news broadcast, recently the Shanghai Oriental Pearl TV Tower, the lighting project was replaced by a led display, which not only saves energy but also enhances the aesthetics. Experts from China Epoxy Resin Industry Association () said that the domestic LED chip has been successfully developed abroad, and it is expected that in the near future, home decoration will also be illuminated by LEDs.
Led hardening temperature and time with sealing resin is a very important topic. According to the experts of China Epoxy Resin Industry Association (), the main points include the following aspects: Generally, the hardening agent for sealing resin for LED is acid anhydride, and the hardening temperature is about 120~130 °C; The hardening time is shortened after the accelerator is added. Regarding the hardening time and the phenomenon of hardening and hardening rate, the expert further stated that the thermal conductivity of the resin is small, the internal hardening heat accumulation affects the hardening rate (reaction rate), and the inner (hardening heat) outside (oven) high heat displycase is easily deformed. The expert said that it is necessary to pay attention to another point. The blending ratio and characteristics of D?D resin and hardener: The amount of hardener used depends on the required properties. When the blending ratio of the hardener is small, the hardness of the hardened material is hard and yellow. When the compounding ratio of the hardener is large, the hardened material becomes brittle and the coloring is small. For tg?D?D glass transfer points? D?D and hdt (heat distortion temperature), experts from China Epoxy Resin Industry Association () continue to introduce three technical points? D? D test method: tma, dsc.b: the temperature difference between the two is 2~3 °C; the tg becomes higher after adding the filler; the electrical properties of the epoxy resin (insulation resistance rate and the loss rate of the induced electric loss) are low The deformation temperature is consistently high.
The epoxy resin used for constituting the envelope must have moisture resistance, insulation, and mechanical strength, and has a high refractive index and transmittance for light emitted from the LED. According to experts from China Epoxy Resin Industry Association (), the choice of encapsulation materials with different refractive indices, the influence of package geometry on photon and escape efficiency is different, and the angular intensity of luminous intensity? It is also related to the die structure, the light output mode, and the material and shape used to package the lens. If a pointed resin lens is used, the light can be concentrated to the axial direction of the LED, and the corresponding viewing angle is small; if the resin lens at the top is circular or planar, the corresponding viewing angle will increase. As a kind of light-emitting device with long service life and low energy loss, LED has been in the country for 20 years. Due to its special performance superiority, it is gradually replacing the original light-emitting device and used in industrial and civil use. Every corner. Especially with the shortage of human energy, the market prospects are very impressive. In recent years, LED has become more and more widely used in urban lighting engineering, industrial, and civil construction industries. According to the CCTV news broadcast, recently the Shanghai Oriental Pearl TV Tower, the lighting project was replaced by a led display, which not only saves energy but also enhances the aesthetics. Experts from China Epoxy Resin Industry Association () said that the domestic LED chip has been successfully developed abroad, and it is expected that in the near future, home decoration will also be illuminated by LEDs.
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