"If measured by the standard of pure gold 1.0 and 500m length of single roll, the current price of gold wire with a diameter of 25μm is about 1000 yuan, and as the gold content decreases, its price will gradually decrease, for example, 60% content. The alloy wire, its price will be around 600 yuan.
Next is the high-silver alloy wire, which is mainly composed of silver. The price is about 100-300 yuan, and then the copper wire is 50-60 yuan. This is the cheapest synthetic wire. Yin Shuyuan, director of Sigma Technology Co., Ltd., told reporters that the price difference between gold and synthetic gold wires of different materials is extremely huge.
In addition, the reporter also learned that the diameter of the current gold wire is mainly divided into four different specifications of 25μm, 27μm, 28μm and 30μm. Its different diameters also have different manifestations in cost, and at the same time, it has a certain degree of influence on product quality.
“Obviously, the finer the diameter of the gold wire, the lower its price. Because the LED light source is extremely hot when it is working, and the temperature drops sharply during the process of extinction. Principle, if the diameter is too low, the tension is not strong, it is easy to cause the occurrence of virtual welding, wire breakage, etc., resulting in problems in the overall light source quality." Zou Yiming said that the 25μm pure gold wire compared with the 28μm specification, its The price will be 300-400 yuan cheaper, but for the stability of the product, the industry still uses 28μm diameter gold wire in the COB device.
Judging from the current development of the LED industry, many manufacturers are currently using cheaper alloy wires. As the machine's running-in rate increases and the production process progresses, the yield of alloy wires in some fields may even Higher than pure gold wire.
“When we started the development of copper wire at the beginning, the finished light source made at that time was very easy to cause dead lights. In the most critical production process, the product yield was very low. After that, we made a lot of efforts, for example. After replacing the ladder and adjusting the parameters, after a period of time, the production yield of our current copper wire is even higher than that of the gold wire.†Zhang Lei said that compared with the gold wire, the hardness of the copper wire is larger than that of the gold wire, and it is not easy to break. Line, but ductility is much lower than the gold line. Therefore, in the processing of such alloy wire, the enterprise needs to thoroughly study the material itself in the early stage, so as to ensure the yield of the later production.
It is reported that the current copper wire of Jingtai Optoelectronics is only used in full-color lighting, and the white light field has not yet been involved. The reason is that when a white light source is produced, the use of copper wire causes light absorption, which affects the light effect to some extent. For the future development trend, we can usher in the general improvement of material properties, then there will be a new assessment to verify that it will not work. Zhang Lei also said that after all, the cost of alloy wire is lower. In the future, with the advancement of packaging technology, perhaps the alloy wire can usher in the general improvement of material properties, then there will be a new evaluation to verify that it will not work.
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