WHAT IS CERAMIC PCB? -- HITECH CIRCUITS CO., LIMITED
What is Ceramic PCB?
Ceramic PCB board is also called ceramic substrate or ceramic circuit board, ceramic copper coated plate, ceramic substrate refers to the copper foil directly bonded to alumina (Al2O3) or aluminum nitride (AlN) ceramic substrate or other ceramic substrate surface (single or double) on the special process board. The ultrathin composite substrate has excellent electrical insulation performance, high thermal conductivity, excellent soft brazing and high adhesion strength, and can be etched into a variety of graphics like PCB board, with great current-carrying capacity. Therefore, Ceramic PCB board has become the basic material of high power electronic circuit structure technology and interconnection technology.
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Ceramic PCB Manufacturing & Assembly – One-stop service The ceramic substrate (ceramic PCB) refers to a special process board in which a copper foil is directly bonded to a surface of an alumina (Al2O3 ) 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 current ability.
2. The advantages and disadvantages of Ceramic PCB
(1) Ceramic PCB board has very good thermal conductivity and insulation performance. Ceramic PCB board is made of ceramic substrate, ceramic substrate itself has very good insulation and thermal conductivity, thermal conductivity of 25~230w, insulation resistivity is 10 minus 14 square, visible insulation performance is very good.
(2) The dielectric constant of ceramic PCB board is very low, the dielectric loss is small, has very good high frequency performance, the dielectric loss of alumina ceramic PCB board is less than 0.0003@1MHz, the dielectric loss of aluminum nitride ceramic PCB board is less than 0.0005@1MHz. Low dielectric loss, high frequency performance, is widely used in the field of high frequency communication.
(3) Ceramic PCB bonding force is strong, using bonding technology, copper foil will not fall off.
(4) Ceramic PCB has large on-board flow, 100A current continuously passes through 1mm0.3mm thick copper body, and the temperature rises about 17℃; when 100A current continuously passes through the 2mm0.3mm thick copper body, the temperature rises only about 5℃.
(5) Ceramic PCB board is with high temperature resistance, corrosion resistance, environmental protection, can work in a very complex environment, long-term high frequency, long service life.
Disadvantages: fragile, scrap rate is high, this is one of the main short comings of ceramic PCB board, which leads to the production of a small area of the circuit board, the general size is less than 120mm, special custom 200mm,230mm, the general price is more expensive, the board cost is higher. In addition, because ceramic PCB board is made of ceramic material, it does not have better toughness like FR4 board, so it can make more than one meter long and wide. Another point is that the price is expensive, the requirements of electronic products are more and more rules, ceramic circuit boards are still used in some relatively high-end products, low-end products will not be used.