Alumina ceramic PCB is a special process board in which copper foil is bonded directly to the surface of alumina (Al2O3) ceramic substrate (single-sided or double-sided) at high temperature. The ultra-thin composite substrate is made of excellent electrical insulation properties, high thermal conductivity characteristics, excellent soft brazing, and high adhesion strength, and can be etched like a PCB board can be a variety of graphics, with a large current-carrying capacity.
Therefore, the ceramic circuit board has become a high-power power electronic circuit structure technology and interconnection technology of the basic materials. Wide range of applications, applied to high-power equipment, IC MOS tubes, IGBT patch thermal insulation, high-frequency power supply, communications, mechanical equipment, strong current, high voltage, high temperature, and other products that require thermal conductivity and thermal insulation parts.
Aluminum Nitride (AlN) ceramics is a new type of high thermal conductivity substrate and packaging material, with high thermal conductivity, low coefficient of thermal expansion, low dielectric constant and low dielectric loss, high mechanical strength, and other characteristics. Ceramic Aluminum Nitride PCB, processing process, and low-temperature co-fired ceramics (LTCC) are similar to the raw ceramic sheet through the perforation, filling, printing, laminating, cutting, co-firing plating, and coating processes.
Currently, there are four main types of substrate materials commonly used in electronic packaging: polymer substrates, metal substrates, composite substrates, and ceramic substrates. Ceramic substrate materials are widely used in electronic packaging substrates because of their high strength, good insulation, excellent thermal conductivity and heat resistance, small coefficient of thermal expansion, good chemical stability, and other advantages. Ceramic package substrate materials mainly include Al2O3, BeO, and AlN. At present, Al2O3 ceramics is the most mature application of ceramic packaging materials, with its thermal shock resistance and electrical insulation, production and processing technology is mature and widely used.
Aluminum nitride ( AlN ) ceramics a typical high-temperature co-fired ceramics and have been put into use in ceramic substrate materials such as Al2O3, BeO and AlN, SiC. From the structure and production process, the co-fired ceramic plate can be divided into high-temperature co-fired multilayer ceramic substrate, low-temperature co-fired ceramic substrate, thick film ceramic substrate, direct bonding copper ceramic substrate, and so on. High-temperature co-fired multilayer ceramic substrate preparation process is the first ceramic powder Si3N4, Al2O3, and AlN adds organic binder, mixed uniformly to become a paste slurry, and use a scraper to scrape the slurry into flakes, and then the drying process to make the flake slurry to form the billet, and then based on the design of each layer of the drilling guide through the holes, the use of screen-printed metal slurry for wiring and filling holes, and finally the billet layer is stacked on top of one another in the Finally, the layers are stacked and sintered in a high-temperature furnace (around 1600°C). Because of the high sintering temperature, the choice of metal conductor materials is limited, mainly tungsten, molybdenum, manganese, and other metals with high melting points but poor electrical conductivity, high production costs, and thermal conductivity generally in the range of 20~200W/m℃, depending on the composition of the ceramic powder and purity. Alumina ceramic PCB
Relative to plastic-based and metal-based its advantages are:
(1) low dielectric constant, good high-frequency performance.
(2) Good insulation and high reliability.
(3) High strength, good thermal stability.
(4) Low coefficient of thermal expansion and high thermal conductivity.
(5) Good air tightness, and stable chemical properties.
(6) Good humidity resistance, not easy to produce the micro-crack phenomenon.
The disadvantage is that the cost is very high. OPCBA can produce alumina ceramic pcb for you.
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