The development of flip-chip LED technology will focus on high-power and high-light density output devices, while the development direction will gradually transition to Flip-chip on PCB (FCOB) and standardized optical components.
As a pioneer in flip-chip light source, Liyang shares in line with the international first-line brand in the process and equipment for the fabrication of flip-chip LEDs.
In the process of making the substrate solder paste, Liyang has adopted the world's leading 3D automatic printing technology, eutectic welding, high efficiency and high reliability. At the same time, in the monitoring equipment, Liyang is equipped with advanced automatic The X-RAY cavity rate monitor monitors the production of the whole process and greatly improves the quality.
The package change seminar hosted by Gaogong LED was successfully held in Shenzhen Qingqing World on September 9th. Yin Xiaopeng, deputy general manager of Liyang Co., Ltd., shared the "Analysis of Next Generation LED Packaging Technology Based on Flip-Chip Process".
Yin Xiaopeng, deputy general manager of Liyang Co., Ltd.
With the increasing demand for LED light source performance, customers are increasingly pursuing high quality, high luminous efficiency, and high cost performance, and the emergence of flip-chip light sources has just catered to the market demand.
"Despite the relatively large market demand, there are still some difficulties in the popularization of flip-chip LEDs." Yin Xiaopeng said that it is mainly reflected in four aspects.
1, the upstream chip brand and size selection (relative dress) is less;
2. The capacity and yield of flip chip needs to be further improved;
3. Flip-chip LED technology currently has greater advantages in medium- and high-power products and integrated packaging. In low-power applications, cost competitiveness is not very strong;
4, flip-chip LED subverts the traditional LED process, from chip to package, the requirements for production and testing equipment are higher. Take the package and say that the cost of the front-end equipment that can do flip-chip will definitely increase a lot, which sets the threshold, so that some companies can not really use this technology.
Liyang has always focused on flip-chip R&D and has overcome these difficulties. At present, the inverted LED production line of Liyang has been successfully mass-produced, with stable quality and imported into various products, which has won the first opportunity for the company's future development.
It is worth mentioning that at this meeting, Yin Xiaopeng introduced the FE30/FE35 series products and focused on the four characteristics of this series.
First, the super-reliable dead light rate is almost zero. The FE30/FE35 has no gold wire package, which completely eliminates various reliability problems caused by the bond alloy wire, and the dead light rate of the lamp is greatly reduced;
Second, reduce the cost of the lighting system. The lamp body of the FE30/FE35 light source is smaller, the power is larger, the effect is better, the design space is larger, and the system cost of the lamp is greatly reduced;
Third, long life. Using a thermal conductivity of tens of times and an insulating solder paste to connect the thermal resistance between the lens electrode and the holder to improve the thermal conductivity of the LED;
Fourth, the patent Molding technology has greatly improved the light output rate. Adopting an innovative structure, the company independently develops a package lens independently. Compared with the previous generation of planar packaging products, it increases the light output rate by 8%-10% on the one hand, and increases the front shot area on the other hand. The hot channel is smoother and easier. Secondary light distribution, the light extraction efficiency is greatly improved!
“The flip-chip products of Liyang are mainly used in outdoor lighting (instead of traditional COB light source products, applied to outdoor lighting, such as: street lights, high pole lights, etc.), special lighting (replacement of traditional COB light source products, applied to high-power special lighting) Such as: car lights, stage lights, projectors, etc.). Yin Yupeng finally mentioned.
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