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A cultural and ideological movement broke out in Europe from the 14th to the 16th century, with the representative figure being the Italian poet Dante. His "Divine Comedy" was sung in various corners of Europe. At this time, Europe's cultural and scientific thinking underwent earth shattering changes, which also promoted the outbreak of the Industrial Revolution in the 18th century and entered the era of electrification. The use of electricity caused earth shattering changes in society, After that, the invention of electric lights completely changed our lives, and we also entered the era of electrification.
Nowadays, people's living standards are gradually improving, and lights are no longer just used for lighting. They can sometimes even appear in our vision as a form of luxury. Especially now, the use of high-end LED lights is to display extreme luxury. Therefore, the LED industry has undergone multiple product technological innovations to meet consumers' pursuit of identity and status, The emergence of ceramic substrates will usher in a new wave of high-end LED industry trends.
Compared with ceramic substrates, ordinary PCB substrates are more widely used and have lower prices, but there may be some performance issues. The PCB substrate is mostly made of epoxy resin, which can withstand low temperatures and is not suitable for use in high-temperature environments. Taking the most common car lights as an example, ordinary vehicles are only used for lighting, but for luxury cars like Rolls Royce Yaoying, just one front light costs 150000 yuan and epoxy resin substrate will not be considered. Ordinary PCB boards cannot withstand the high heat generated by high light, nor can they match the identity and status of the car owner. In addition, it is an organic material that cannot withstand cosmic rays, so some equipment substrates that need to reach the level of aerospace materials cannot be used. Moreover, many in the current LED industry need to be able to withstand instantaneous high pressure, which is obvious that PCB boards cannot withstand. Most substrates like this are used on computer motherboards and other low temperature energy consuming devices.
Next comes the metal substrate. Common metal substrates include copper substrate, aluminum substrate, and a small amount of iron substrate. These substrates themselves have extremely high thermal conductivity. For example, copper itself has a thermal conductivity of 383.8W/m.K. However, since it is a metal plate, a layer of insulation needs to be attached to prevent short circuits in the circuit. The average insulation layer on the market has a thermal conductivity of 1.0W/m.K, and the best one is only 1.8W/m.K, which results in a very low thermal conductivity. Of course, it is not a problem to use it in simple low heat and low-end products. However, if used in high-temperature heating appliances, a large amount of heat will not be transmitted, which will increase the load on the circuit and equipment. In severe cases, it will burn the circuit and even cause fire, causing personal and property losses, which is also very unacceptable.
Since other materials are difficult to meet the performance requirements of high-end LED products in the market, let's explore ceramic substrates, which are high-quality products that drive innovation in the LED industry and better meet consumer needs. Firstly, the production of ceramic substrates requires the selection of exquisite ceramic plates, among which AL2O3 and ALN ceramic plates are outstanding in the ceramic plate industry. Nowadays, many high-end car models have adopted LED lights worth hundreds of thousands of yuan, among which the substrate material used is ALN material. Of course, having high-quality materials alone is obviously not enough, and high-quality technology is also needed to make circuits on ceramic boards. Sliton has already taken the lead in this field, ultimately combining ceramic plates and metal copper in the form of ion bonds. Ordinary substrates only need to be directly bonded with conductive adhesive or simply welded, which will greatly reduce the effectiveness. Over 10 million luxury cars will not be equipped with LED lights that will fade after use for a period of time. The bonding strength between ceramic substrate and metal copper layer can now reach up to 45MPa. In addition, there is a better matching coefficient of thermal expansion between ceramic plates and titanium, and even at high temperatures, the metal and ceramic will firmly adhere together. Moreover, the thermal conductivity of AL2O3 and ALN ceramics themselves is as high as 15-35W/m.K and 170-230W/m.K, respectively. The high thermal conductivity can quickly transfer the heat from the circuit to the ceramic plate, and then remove the heat from the ceramic plate through the heat dissipation device, allowing the equipment to operate in a good working environment and extending its service life. Luxury cars like Rolls Royce and Land Rover have extraordinary identities and status as owners, and their headlights are extremely luxurious. Of course, the heat generation is higher, so choosing a ceramic substrate is obviously the best choice. Moreover, ceramics themselves are inorganic materials that can be used in harsh environments. For example, hydraulic sensors used to detect car fuel are immersed in fuel, which requires the substrate material to have stable chemical and electrical properties. The stable electrochemical properties of ceramic substrates make their application fields more extensive, and the high refractive index of ceramics can increase the brightness of light in the LED emission process compared to other materials. Isn't this exactly what consumers demand for higher brightness LED lights?
Technology is the primary productive force, and only technological innovation can truly improve our lives. Ceramic substrates are gradually being widely used in the Chinese LED market, and we believe that ceramic substrates will compose a new "Divine Song" that will resonate in every corner of the world.
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