With the development of LED packaging technology and the evolution of packaging materials, the light decay of lamp bead products has become one of the most concerned issues for many LED packaging companies. In addition to the effects of chips and phosphors on the light decay of lamp beads, the protection of lamp beads Vulcanization performance has become the most important factor affecting the light decay and service life of LED Lamp beads.
In January 2017, Hongli Zhihui's PPL non-vulcanization product solution achieved its first mass production in China. The problem of vulcanization is also a problem that plagues many companies. For example, the temperature is now getting higher and higher. In the case of high temperature, external harmful substances enter the package, and blackening occurs after the reaction.
In response to this problem, Hongli Zhihui's PPL non-vulcanization process solution can cover all SMD, SMC, and EMC products, and can completely solve the problem of vulcanization. Up to now, three invention patents have been applied.
In addition, combined with PPL anti-sulfur technology, SMC package, higher reliability, SMC5050/7070 products will gain a rapid growth in outdoor product applications.
“SMC†is the abbreviation of the English letter Silicon Molding Compound. “The SMC package is an upgraded version of EMC. EMC is epoxy. SMC is made of silicone. Its heat resistance and UV resistance are improved compared with EMC epoxy. One level".
"The principle of SMC technology is similar to the current EMC technology. For manufacturers that have established EMC production lines, it is only the upgrade of the solution and raw materials." Zhang Luhua, marketing director of Hongli Zhihui Group, said that the manufacturing process of SMC can be extended to the original EMC package. The process, by contrast, SMC has a higher heat resistance temperature.
Zhang Luhua believes that the SMC package may be applied to flip chip in the future. Especially for the eutectic soldering process, it is necessary to fix the gold-tin alloy on the bracket, which will put higher requirements on the heat resistance of the bracket, so the SMC will undoubtedly The field plays a bigger role.
In addition, the reflectivity of EMC, PPA, and SMC package materials was compared. The initial reflectances of these three materials were 90%, 93%, and 93%, respectively, and the 1000-hour aging test was performed at 150 °C. After that, the reflectivity of EMC, PPA, and SMC decreased to 70%, 40%, and 88%, respectively, and the reflectivity of the SMC package was optimal.
It is understood that there are only a handful of packaging manufacturers involved in SMC in China, and only a few LED companies such as Simai, Ruifeng Optoelectronics, and Tiandian Optoelectronics have made layouts. Among them, as the first manufacturer of mass-produced SMC packaging products, Smect will be able to fill the domestic gap in this technology.
Zhang Luhua said, "The future SMC will have a certain market space like EMC, and it is expected to form a market boom."
In addition, Ruifeng Optoelectronics is also laying out the SMC market, and now the products are preparing for mass production, which is expected to be introduced to the market in July this year.
Ruifeng Optoelectronics CTO Xiao Xiaoming believes that "SMC will form a market, but it will not be as versatile as PPA, because there are problems of "useless" and "appropriate", such as in areas with high power. SMC will better highlight the value. But in the field of general lighting like lamps, there is no need to use it, and it is not cost-effective."
Regarding the maturity of SMC products, there is no problem at all, and the price/performance ratio is constantly improving. Compared with EMC and PPA, the price/performance ratio is even higher.
As power increases, the cost per watt of SMC will decrease in terms of performance. For example, EMC can do 1 watt, SMC can do 3 watts. Zhang Luhua said frankly, "Through our continuous efforts, the price of SMC will not be much more expensive than EMC, and it will basically be flat, but it will be higher in performance and reliability."
Indeed, if you only look at a 3030, SMC prices are relatively expensive, but an SMC3030 can achieve 3W, and an EMC3030 can achieve less than 2W, comprehensively calculated, SMC has an advantage in price. In other words, from the point of view of the single product, there is no advantage, but it can load higher power, and it is more advantageous in terms of cost performance.
As far as market application is concerned, SMC is mainly used in the field of outdoor lighting, so higher requirements are placed on reliability. Of course, SMC's performance in high temperature and UV resistance is indeed better.
“In fact, SMC can be applied in every field, but at present, it is more cost-effective in the high-power field. Our SMC products are mainly used in the backlight field.†Xiao Xiaoming mentioned.
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