PCB News - Comparative analysis of ceramic metallized products and ordinary pcb boards

Comparative analysis of ceramic metallized products and ordinary PCB boards
Nowadays is the Internet era, all kinds of big data are readily available. When we choose products, we will conduct detailed analysis of the products to be selected based on the big data provided to us by the Internet. Through the comparison of data, we can choose to be more suitable for ourselves. The product. The competition between ceramic metallized products and ordinary PCB boards on the market has become fierce. Now we compare the most common PCB boards and ceramic metallized products on the market to briefly analyze why the rising star-ceramic metallized products have The reason for such a strong market competitiveness.
Raw material price comparison
Material price is a major aspect of profit for manufacturers and sellers. The price of ordinary PCB boards on the market will vary according to different materials. For example, the price of 94VO paper substrate FR-4 is 110~140 yuan/square meter of its thickness. Of course, the price of CEM-1 94HB single-sided paper substrate is also 500 yuan/square meter. The price of ordinary fiberglass board will be relatively low, for example, the price of FR-4 fiberglass board at 0.3-0.5mm is 40-50 yuan/square meter. The price of epoxy resin substrate is not much different from that of chemical fiber board. The epoxy resin 3mm yellow fiberboard is also 20 yuan/Kg. Of course, if the selected board area is larger, its price will also change relatively. For example, the price of 3mm 500*1000 yellow epoxy resin is 50 yuan/sheet. The price difference between these two sides is also based on the thickness, size, and different processes of the board.

The price of ceramic plates today is also uneven. According to the thickness, material, and production process of the ceramic plates, the prices required are also very different. The ceramic plates are divided into 92 alumina ceramic plates, 95 alumina ceramic plates, 96 alumina ceramic plates, and 99 alumina ceramic plates. Of course, there are also silicon nitride ceramic plates and 99 aluminum nitride ceramic plates. Both sides are priced according to the thickness and size of the ceramic plate. For example, 40*40*2mm IGBT substrate is about 3 yuan per piece. The price of aluminum nitride ceramic plate will be relatively expensive. The price of 0632*0.632*0.2mm aluminum nitride ceramic is basically around 200 yuan.
Simply from the price comparison, the price of ordinary PCB boards with the same volume is much cheaper than ceramic boards. Relatively speaking, it is more economical to choose ordinary PCB boards. However, in early July this year, several companies such as Shandong Jinbao, Kingboard, Mingkang, Weilibang, and Jinan Guoji successively issued notices of price increases for copper foil and copper clad laminates. The increase was as follows: The increase is 10 yuan/piece, the insulating glass fiber ccl is increased by 5 yuan/piece, and the sheet material is increased by 5 yuan/piece. At the end of July, Fujian Mulinsen Lighting, Dongcheng Hongye, Morgan Electronics, Haile Electronics and many other PCB companies issued notices of price increases for circuit boards, and the increase was almost 10%. Although the materials used for ordinary PCB substrates are economical and affordable, after such a large price increase, it is obvious that the price of the corresponding product is raised, and the profit of the PCB substrate is compressed.
Material performance comparison
In ordinary PCB boards, cardboard, epoxy resin, and fiberglass board are used. Except for fiberglass board, the rest are organic. Therefore, chemical reactions are prone to occur under the irradiation of cosmic rays, changing its molecular structure and deforming the product, so it cannot be used in aerospace.
Ordinary PCB substrates are less dense and lighter than ceramics, which is good for long-distance transportation. Cardboard and epoxy resin board have high toughness and are not fragile.
But ordinary PCB boards cannot withstand high temperatures. The ignition point of paper is at 130°C, which is quite low. Even the addition of anti-high temperature materials can not change its high temperature resistance characteristics. The ignition point of most epoxy resins is around 200°C, and their high temperature resistance is also very weak. The last is the fiberglass board. FR-4 glass fiber board is composed of high temperature resistant glass fiber material and high heat resistance composite material, but regardless of glass fiber material, it is toxic and harmful to human body, so it is not advisable.
Ceramic board is an inorganic product, corrosion-resistant, high-temperature resistant, can withstand cosmic rays, and is suitable for the selection of materials for aerospace equipment.
The thermal conductivity of ceramic substrate is high. For example, the thermal conductivity of aluminum nitride ceramic board is as high as 170~230W/MK. The thermal conductivity of ordinary PCB substrate is 1.0W/MK. The thermal conductivity of ceramic substrate is the same as that of ordinary PCB substrate. About 200 times, those who need to conduct high heat are undoubtedly the long-term drought and nectar.
The ceramic substrate itself is an insulating material, and there is no need for any insulating material in the process of making the ceramic substrate. In the production of ceramic metallization products, the bonding strength of ceramic and metal titanium can reach up to 45MPa. Metal copper and ceramic have a more matching thermal expansion coefficient. The ceramic plate and metal layer can be firmly combined under high temperature conditions. The metal wires and ceramic plates may fall off.
Although the texture of ceramic plate is relatively brittle, it has high mechanical hardness and low dielectric constant, so it can be used at high frequency. If used in the electronic communication industry, the signal loss rate can be greatly reduced.
The ceramic substrate is resistant to high temperatures, and the breakdown voltage is as high as 2wV. In the face of sudden high voltage, it can not only ensure the normal operation of the equipment itself, but also ensure the safety of the operator.
Ceramic plates are chemically stable and can be used in electronic products that are corrosive or need to be immersed for a long time, such as automotive LED sensors, and have stable and reliable performance.
Generally speaking, ceramic metalized products and ordinary PCB products have their own advantages and disadvantages, and they will have their own broad living space in different fields. However, with market demand, the application of ceramic metalized products will be more extensive, and its performance as an emerging product Excellent and will be more competitive in the future market.