As the main component of the LED bulb , the current selection of materials is very extensive, I only analyze the field of sapphire filament support.
First, the processing technology.
The basic class of processing technology can be divided into two steps: grinding and polishing
The grinding and polishing process steps are: cutting-forming-slicing-grinding and polishing. The earliest domestic research and production of the sapphire filament support substrate polishing and polishing process is Taixing Hecheng Optoelectronics Technology Co., Ltd., which used the sapphire edge leather material for production earlier, which greatly solved the problem of the waste of the long crystal manufacturer. .
Regarding the cutting process, the current mainstream cutting process has two forms: laser dicing lobes and diamond multi-wire cutting. Both of these processing techniques have their own advantages and disadvantages: the biggest advantage of the laser dicing lobing method is high yield and narrow seam. Increasing the discharge rate, the disadvantage is that the edge has a zigzag shape; the diamond multi-wire cutting edge is smooth, but the seam width is wide, the discharge rate is low, the width tolerance is not uniform for laser dicing, and in order to solve the strength problem, secondary annealing is also performed. In the long run, to solve the large-scale production, or rely mainly on laser cutting, the current domestic laser company is Suzhou Delong Laser.
Second, the characteristics of sapphire filament.
The sapphire filament support is made of sapphire. After processing, it can be processed by grinding, polishing, cutting and annealing to meet the series of physical requirements of LED bulbs . The characteristics are as follows:
1. Excellent heat transfer performance.
The sapphire filament support is resistant to high temperatures of 2050° and has excellent thermal conductivity. No matter how the internal temperature changes, it will not cause deformation or breakage caused by thermal expansion and contraction.
2. Increased brightness.
The sapphire filament holder is polished to improve the transmittance. After testing, the transmittance can reach more than 85%, far exceeding other materials.
3. High intensity and small volume.
The hardness of sapphire is second only to diamond in single crystal material, so the strength is greater. The sapphire filament support of 30 (length) * 0.8 (width) * 0.4 (thickness) mm can withstand pressure up to 150g, greatly improving the customer. The yield during processing, because the strength is greater, so the volume can be made smaller, and even 30 (length) * 0.6 (width) * 0.4 (thickness) mm, which is insurmountable to other materials.
4, the bulb life is longer.
The main material of the LED chip is sapphire. If the sapphire filament support is used, the combination of the two components is better and the physical properties are consistent, which can greatly increase the life of the bulb. According to the short board theory, if the life of the filament affects the life of the entire bulb, This will result in the scrapping of the 25-yuan bulb due to the 2 yuan filament holder. Using a sapphire filament will overcome this short board.
Third, the prospect of sapphire filament support.
At present, the quality of sapphire materials is the most superior among the materials used in the sapphire filament support. The core problem is the price.
The processing of sapphire filaments through several links and the high material cost are more expensive than other materials, but we believe that this relatively expensive material will not affect the application of sapphire in LED filaments. The specific reasons are as follows: :
1. The initial price of the sapphire filament support is 1.2 yuan/bar. With the improvement of the processing technology, it has been reduced to 0.6 yuan, which is almost half. This price can fully meet the psychological expectations of the packaging enterprise;
2, especially can not be ignored is the cost of sapphire filament support in LED bulbs. At present, the cost of the entire sapphire filament in the bulb is about 1/2 weak and 1/3 strong, while the sapphire filament bracket accounts for less than 1/3 of the filament cost, that is, according to the current price calculation, even the sapphire filament If the bracket does not cost a penny, the cost of the entire bulb will drop by about 2 yuan. Therefore, the price of the LED bulb does not ultimately depend on the filament holder;
3. The price of sapphire materials is not expected to rise sharply as expected. Many people think that with the application of sapphire in mobile phones and other fields, the price of materials will rise. In fact, otherwise, the sapphire material used in sapphire filaments is the “shovel†of sapphire crystal growth companies, which has the capacity of many sapphire manufacturers. Expansion, supply will be more and more, even if the sapphire market is considered to turn, it will not lead to the rise of this material; secondly, the influx of many sapphire filament manufacturers will cause the price to be marginal, as long as a large number of manufacturers There is no need to worry about the rise of materials.
Therefore, we believe that sapphire material is the first choice for filament holders for a long time and is irreplaceable.
Fourth, thinking about the development of the industry.
Many industries in China are dead in a swarm of bees. What we are worried about now is whether this swarm of bees will enter the sapphire filament support industry.
According to the survey, currently engaged in the production of sapphire filament support not only Taixing Hecheng Optoelectronics, Harbin Orient, Wuxi Yuanliang and other well-known enterprises, but also many cutting, crystal, piezoelectric crystals have been swarming in, Under the premise of not being trusted by customers, the price war was actively initiated, leading to market confusion.
In fact, the two factors that a rational packaging company must consider when selecting suppliers are stable processes and continuous delivery capabilities. If they are purchased from them simply because of the prices of these small factories, they will certainly be planted. Big heel.
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