Compared with the traditional LED strip lights SMD SMD package, as well as high-power package, COB packaging can be directly encapsulated multi-chip metal-based printed circuit board the MCPCB directly through the substrate cooling, not only can reduce the stent manufacturing process and its cost, but also has reduce the thermal resistance of heat advantage.
Cost and application point of view, the COB has become the mainstream of the future of lighting design. COB packaging of the LED 400W module is installed in the floor pieces of LED chips, the use of many pieces of the chip can not only improve the brightness, and also help to achieve a reasonable configuration of the LED chip, reduce the amount of current of the input of a single LED chip to ensure high efficiency. And this surface light source can greatly expand the package heat dissipation area, so that the heat is more easy to transfer to the shell.
Semiconductor lighting to enter the general lighting field, the cost of production is the first major constraints. To reduce the cost of semiconductor lighting, you must first consider how to reduce the cost of the LED package. The traditional LED Floodlight 80W lamps is: discrete device → the MCPCB light source module → LED lamps LED light source, light components based on the absence of an applicable core taken in practice, not only consuming work time-consuming and high cost. In fact, if you take the "COB light source modules → LED lamps" route, not only saving time and labor, but also can save the cost of the device package.
Cost lighting applications with traditional COB light source module can save the cost of the device package, the light engine module production costs and the cost of secondary light distribution. Lighting system in the same function, in general can reduce about 30% of the cost of great significance for the promotion of semiconductor lighting applications. In performance, through reasonable to design and mold making microlens, the COB light source module can effectively avoid the discrete light source device combination existence of points of light, glare and other drawbacks also can be through by adding the appropriate red chip combination in does not reduce the light source efficiency and life under the premise of effectively improve the color rendering (now can do 90 or more).
In the application, the COB light source module can make installation of the lighting plant production simpler and more convenient. In production, the existing technology and equipment to support large-scale manufacturing of the high yield of COB light source module. With the expansion of the LED Blue 150W lighting market, lighting demand in the rapidly growing, we can according to the needs of different lighting applications, and gradually formed the mainstream product of the series COB light source module, so that large-scale production.
However, technically, the COB package is still light failure, short life, poor reliability of the inadequacies to be resolved.
Enterprises: the mass production of ceramic COB packaging
According to the survey, the number of firms in the COB packaging is gradually increasing, some companies have been able to achieve volume production, increase investment in the technical aspects.
July, from Guangdong world line photoelectric self-developed new LED COB packaging light source module, after several years of R & D and testing, automated mass production. Product performance is stable, mature production technology and is expected to formally put into operation in September this year, six series of more than 100 products to market.
Taiwan Everlight has also recently launched a new COB LED 200W components products. The Everlight stressed that this component will provide the light source of LED energy saving light bulbs better, compared to now used to package components for low, medium and high power LED on the LED bulbs, the COB is expected to become the new mainstream of LED energy saving light bulb light source. In addition, one hundred million meters Optoelectronics Technology Co., Ltd. in Zhejiang from October last year, mass production of COB packaging products, the annual output of more than a million.
It is understood that since last year, many Japanese manufacturers have also begun to shift the COB package mode, the COB light source technology has been greatly improved.