Because the current luminous power of UVLED is not high, [UVLED curing machine] manufacturers in addition to improving the level of chip production, packaging technology also has an important impact on the characteristics of UVLED. For UV curing machine manufacturers, in the field of UVLED curing machine has many years of experience, today to give you a chat about UVLED packaging problems, compare the two commonly used UVLED packaging technology.
At present, the UVLED curing machine mainly includes epoxy resin packaging and metal and glass lens packaging. Here is a brief comparison of the differences between the two packaging technologies.
1. Application band
Epoxy resin packaging is mainly used in near-ultraviolet leds of about 400 nm, but ultraviolet light has a greater impact on the aging of the material. Metal and quartz glass packages are mainly used for UV leds with wave lengths less than 380 nm. Quartz glass softening point temperature is 1600℃, hot processing temperature is 1 700~2000℃, from the point of view of the process, quartz glass is not suitable for sealing LED chips; The high temperature and heat resistance of epoxy resin are general, and the resistance to ultraviolet light is poor.
Second, the material optical transmittance characteristics
Epoxy resin has a high transmittance in the visible light range, and the transmittance of some wavelengths even exceeds 95%, but the absorption loss of epoxy resin in the ultraviolet light range is large, and the transmittance decreases rapidly when the wavelength is less than 380nm. The transmittance of quartz glass in the visible and ultraviolet light range is close to 95%, which is the highest transmittance of UVLED among all materials.
Third, resistance to ultraviolet light
Epoxy resin materials have poor resistance to ultraviolet radiation, epoxy resin is a polymer material, under the irradiation of UVLED, the polymer absorbs ultraviolet photons, ultraviolet photons have a large energy, and can open the bond chain between polymers. Therefore, under continuous ultraviolet light irradiation, the main chain of the epoxy resin is slowly destroyed, resulting in the degradation of the main chain, a photodegradation reaction occurs, and the properties are changed. Quartz material shows good stability under ultraviolet irradiation.
Fourth, heat resistance
UVLED packaging puts forward higher requirements for the heat resistance of materials. Epoxy resins and silicone resins have the ability to withstand ultraviolet radiation. In terms of thermal stability, the heat resistance of epoxy resin is poor, while quartz shows excellent heat resistance.
Auvcure is a professional manufacturer of all kinds of UVLED point light source, [UVLED line light source], UVLED surface light source and [UV curing machine], and can provide solutions and customization according to the actual needs of customers. The company has Japanese production technology, products are exported to South Korea, Japan, the United States, Brazil and other places. Welcome friends from all walks of life exchange guidance. If you want to know more about [UV light fixed machine] relevant information, welcome to online consultation customer service or call the company’s service hotline for consultation, we will be happy to provide you with quality service! Some of the information/pictures in this article are from the Internet, only for the purpose of sharing new information in the industry, not for commercial use. If any rights are involved, please inform us immediately, and we will delete it immediately. Thank you.
