As the maturity of LED products is getting higher and higher, the technology is becoming more and more difficult. The flip-chip LED technology has been gradually sought after by the industry in recent years. Because of its good gold-free heat dissipation, but the cost is high, COB has become the best stepping stone to the market.
Nowadays, flip-chip COB has gradually entered the production line of major packaging companies. It is inevitable that the industry will frequently sing flip-chips instead of formal dresses. But why is it still dominated by formal wear? Can flipping really replace it and see what the makers say?
Flip the replacement of the formal dress is the general trend for the narrow market
At present, the flip-chip is not much better than the formal dress, the price is almost the same, and the market recognition is not enough. Moreover, the secondary optics of the flip-chip is still not well-matched, and the brightness is 10-12% lower than that of the formal wear. Although the same side photoelectric can currently achieve less than 8%, it still faces these problems.
Regarding the current brightness of the flip-chip is not enough, the same party photoelectric technology director Huang Wenping said that at the same price, the flip chip size is going down, so the brightness is reduced. But the same size, the flip-chip brightness is too high, after all, it has less light absorption on the front.
In short, the current price/performance ratio of flip-chip COB does not have much advantage. For the time being, it is only a narrow market. However, flipping is a trend, and will definitely replace the formal dress, and it will definitely be brighter than the formal dress, because it is simplified in terms of process and structure.
The same side photoelectric: high optical density flip COB
Zheng Haibin, deputy general manager and marketing director of Jiangxi Zhaochi Optoelectronics Co., Ltd. also said that some COB products are relatively mature and the cost is relatively low. The flip-chip COB fully utilizes the chip to withstand higher current and no gold wire production as material cost optimization, production management cost. Lowering the conditions provided, flipping COB is only a matter of time for market validation.
In this regard, Hongli Optoelectronics general manager Lei Lining believes that the current market for such products is still staring at both ends, one is a low-cost, low-light products. The other end is a high-end product in the dedicated field, such as limited space for luminaire design, but requires high power and high luminous flux output, special requirements for reliability and high power output of small illuminating surface, etc. It has its own unique field.
In this regard, Xia Xuesong, general manager of silicon energy lighting, also said that in the medium and long term, it is an inevitable trend that the market for flip-chips has an absolute proportion. In this regard, Zou Yiming, general manager of Shenzhen Xinyueguang also said that with the light effect of flip chip, the price is continuously optimized and upgraded, and the market space in the future is huge.
Flip and dress are not 0 and 1 market share, but will be mainstream
Flip is to replace the trend, but is it completely replaced? Mo Qingwei, vice president of DHL's chip business unit, believes that although in the next 1-2 years, flip-chip COB will start from high-power outdoor and industrial COB, and medium- and high-power commercial lighting has already begun.
For example, the commercial lighting of NVC Lighting has been basically converted to Dehao Runda's inverted COB. The low-power bulbs should be more challenging, but many teams are working hard in this direction. But flipping cob will be the mainstream technology, but the relationship with the formal cob is definitely not 0 and 1.
Wen Jianhua, senior vice president of Purui Optoelectronics Asia Market, said that there are advantages and disadvantages between flip-chip COB and formal COB. From the current technology point of view, the COB technology and process are more mature, the efficiency is higher, and the current cost control is better; the flip-chip COB can withstand higher drive current, higher optical density, but the efficiency does not have a formal COB high.
It is their different characteristics that make them currently focus on different market segments. The COB is mainly used for general illumination and medium-width beam angles. The flip-chip COB is mainly used for accent lighting and narrow beam angle. In the foreseeable future, they will still play a role in their respective market segments. As for the farther future, it depends on the development of technology.
In this regard, Luminus China's vice president of sales, Fang Ning also said that the current main position of COB is the key lighting for the commercial environment, the requirements for light quality are very high, the advantage of flip COB is that the light surface can be smaller, the angle of illumination Can be more concentrated, but costly and inefficient, unable to cover the needs of the entire commercial lighting application.
In the long-term solution, flip-chip COB will become a useful complement to the formal COB in commercial lighting, but will not completely replace the formal COB.
Yin Hui, deputy general manager of Shengpu Optoelectronics, said that a few years ago, it was predicted that after the CSP came out, there would be no room for packaging enterprises.
LED technology has penetrated into many industries, lighting, backlighting, automotive, agriculture, medical, curing, etc. The application field has determined the diversification of LED packaging forms, and the advantages of flip-chip mounting, but also the formal wear market has replaced Part of it can be completely replaced.
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