Domestic ceramic PCB is heating up _ Where is the ceramic PCB board?

What is PCB? PCB (PrintedCircuitBoard), Chinese name is printed circuit board, also known as printed circuit board, printed circuit board, is an important electronic component, is the support of electronic components, is the provider of electrical connections of electronic components. Because it is made by electronic printing, it is called a "printing" circuit board. In the PCB industry, resin PCB, metal PCB, ceramic PCB, which is the cheapest resin, the most expensive ceramic, then where is the ceramic expensive? First, follow the small series to understand the ceramic substrate, then analyze and introduce the ceramic PCB in the end? Domestic ceramic PCB is heating up _ Where is the ceramic PCB board? Ceramic substrate The ceramic substrate refers to a special process plate in which a copper foil is directly bonded to a surface of an alumina (Al 2 O 3 ) or aluminum nitride (AlN) ceramic substrate (single or double sided) at a high temperature. The ultra-thin composite substrate produced has excellent electrical insulation properties, high thermal conductivity, excellent solderability and high adhesion strength, and can etch various patterns like a PCB board, and has a large current carrying capacity. ability. Therefore, ceramic substrates have become the basic material for high-power power electronic circuit structure technology and interconnection technology. Ceramic substrate characteristics 1, strong mechanical stress, stable shape; high strength, high thermal conductivity, high insulation; strong bonding, anti-corrosion. 2, excellent thermal cycle performance, cycle times up to 50,000 times, high reliability. 3. Like the PCB board (or IMS substrate), the structure of various graphics can be etched; no pollution, no pollution. 4, the use of wide temperature -55 ° C ~ 850 ° C; thermal expansion coefficient close to silicon, simplifying the production process of power modules. Domestic ceramic PCB is heating up _ Where is the ceramic PCB board? Advantages of ceramic substrates 1. The thermal expansion coefficient of the ceramic substrate is close to that of the silicon chip, which can save the transition layer Mo film, save labor, material and reduce cost; 2. Reduce the solder layer, reduce the thermal resistance, reduce the void, and improve the yield; 3. The line width of 0.3mm thick copper foil under the same current carrying capacity is only 10% of the ordinary printed circuit board; 4, excellent thermal conductivity, the chip package is very compact, so that the power density is greatly improved, improving the reliability of the system and device; 5, ultra-thin (0.25mm) ceramic substrate can replace BeO, no environmental toxicity problems; 6, the current carrying capacity is large, 100A current continuously through 1mm wide and 0.3mm thick copper body, the temperature rise is about 17 °C; 100A current continuously through 2mm wide and 0.3mm thick copper body, the temperature rise is only about 5 °C; 7. Low thermal resistance, thermal resistance of ceramic substrate of 0.6×mm thickness of 10×10mm ceramic substrate is 0.31K/W, thermal resistance of ceramic substrate with thickness of 0.38mm is 0.19K/W, ceramic substrate of 0.25mm thickness The thermal resistance is 0.14K/W. 8. High insulation withstand voltage to ensure personal safety and equipment protection. 9. New packaging and assembly methods can be realized to make the product highly integrated and compact. Domestic ceramic PCB is heating up _ Where is the ceramic PCB board? The difference between ceramic substrate and ordinary pcb board A comparison of the material of the pcb board itself on the market The FR-4 board is the most widely used on the market today, but the defects of the FR-4 board are irreversible. The experience of Slyton's technical staff in making boards for many years made a simple analysis of the boards on the market. Advantages of FR-4 CCL: 1, no insulation layer 2, mass production 3, forming fast 4, the price is low There are almost 12 types of defects: 1. The thickness difference is more common in the middle and thicker sides, or one side is thick and thin on one side. It will affect the processing of the pcb, and uneven thickness will affect the depth of the groove. Substrate resistance. For the more precise printed circuit boards, the thick plate is too poor, which will cause the plugs to be tight and the contact is poor. Affect the performance of electronic devices. For multilayer printed circuit boards. The accumulation of thickness excess may cause a whole lot of pieces, and the thickness of the board is too bad, resulting in waste. Can not meet the test platform and other high-precision products on the high-pressure plate thickness tolerance requirements. 2, substrate embossing: affecting the substrate solder resistance, electrical insulation and many other properties, can not be used genuinely. 3. Substrate stratification: It is not impossible to apply this phenomenon, but it cannot be a Class A product. 4, the substrate white spots. White lines: seriously affect the quality of pcb manufacturing 5, the substrate exposed cloth pattern: caused the insulation performance to decline, seriously affecting the quality of pcb board 6, substrate impurities. Black spots: affecting the appearance of the product, there are other effects, what you can do now is 7, copper foil wrinkles: This kind of crease is not allowed to use in pcb production 8. Glue point: It is a resin that has been cured. Corrosion does not occur during the production process. Seriously affect the insulation between the wires. Therefore, it cannot be used for pcb production. 9. Pit: It has a great impact on the quality of pcb products, which may cause the line to be unreachable or unreasonable. 10, pinhole: will cause a thick picture, there are traces of kerosene leakage. 11, copper foil oxidation: slight oxidation will not affect the quality of pcb products, but should also be prevented. Severe oxidation may cause the pcb manufacturing process to be less corrosive and cannot be used for CCL production. 12, copper foil highlights: This point due to the destruction of the oxidation layer, the product is easily oxidized during storage, causing adverse effects on pcb. For larger highlights, copper tin may be thinner than other places, and it will also affect the manufacturing quality of pcb. Ceramic circuit board advantages: 1. High resistance 2. High frequency characteristics 3. High thermal conductivity 3. Good chemical stability. Anti-seismic, heat-resistant, withstand voltage, internal circuit, MARK point, etc. are better than general circuit boards. 4. Precise in printing, patching and welding Disadvantages of ceramic circuit boards: 1, fragile: This is one of the most important shortcomings, currently only a small area of ​​the circuit board. 2, the price is expensive: the requirements of electronic products are more and more, the ceramic circuit board is only satisfied to meet some of the higher-end products, the low-end products will not be used at all. Domestic ceramic PCB is heating up _ Where is the ceramic PCB board? Where is the ceramic PCB board? PCB is different from the clothes and shoes that we usually buy. It is an intrinsic, invisible thing. Usually buy luxury goods, are visible and tangible, you can harvest countless envious sunshine, but ceramic PCB you use or not, in the eyes of consumers, there is basically no difference, the soft quality of electrical appliances is invisible of. Then the question comes, where is the ceramic PCB board expensive? They are analyzed from the following three aspects: Domestic ceramic PCB is heating up _ Where is the ceramic PCB board? 1. Substrate material: Ceramic PCB is currently mainly made of aluminum oxide aluminum nitride. The cost of these two materials is much more expensive than resin substrates or aluminum substrates and copper substrates. Starting from the substrate, the price has already been opened. 2, process technology: From the manufacturing process, whether it is LTCC, HTCC, DPC, DBC or LAM, its manufacturing process will require higher, the co-firing temperature of LTCC and HTCC demand is difficult to control. 3, product performance: As the saying goes, "a piece of money for a piece of goods", this sentence is displayed on the ceramic PCB, the PCB has many important needs, such as thermal conductivity, thermal expansion coefficient, dielectric constant, stability, high Frequency loss, etc. In these respects, ceramic PCBs can achieve the current state of the art. Its thermal conductivity is the best among PCBs, its thermal expansion coefficient is also more compatible with silicon chips, its dielectric constant is very low, its electrical conductivity is excellent, its corrosion resistance, high temperature resistance and high frequency loss are small. Having said that, it can be seen that the ceramic PCB is not unreasonable. Although consumers can't see it, even if they don't understand it, the quality can be felt. Life, stability, and not easy to break can reflect the quality of the product, it is these qualities that will attract today's consumers. Purely on the price war, there is no way to capture thousands of consumers. Looking at the world, ceramic PCB has been applied for half a century, but the domestic ceramic PCB has just emerged, because of technology and other reasons, still rely heavily on imports to maintain domestic production. The research and development of ceramic PCBs by domestic new technology companies has never stopped. For example, Slyton and other companies that are trying to make China catch up with the world have the same heart with the country and keep moving forward. In the future, more technologies will be added to make it more efficient, and the cost control will be more precise. At that time, Chinese ceramic PCB will resound the world. Domestic ceramic PCB is heating up _ Where is the ceramic PCB board? 12345678910