Advantages and disadvantages of ceramic circuit boards

Ceramic circuit boards are used in many civil and industrial product fields because of their excellent heat dissipation, high insulation and high-frequency performance. Our 5G base stations use ceramic circuit boards to make the signal transmission of our mobile phones faster. Many power devices in electronics, transportation, and aerospace products use ceramic circuit boards as heat dissipation substrates. Today I want to explain the ceramic circuit and its advantages and disadvantages.

First, what is a ceramic circuit board

Ceramic circuit boards, also known as ceramic circuit boards, ceramic substrates or ceramic copper-clad laminates, are formed after the ceramic substrate is covered with copper foil, drilled, etched, and surface treated. It has the same electrical interconnection as the circuit board, PCB boards with good electrical properties are applied in various fields of all walks of life.

Second, the advantages and disadvantages of ceramic circuit boards

Because the ceramic circuit board is made of ceramic material, its advantages are as follows:

1. Good thermal conductivity

The thermal conductivity of ceramic circuit boards is very good, and the general thermal conductivity ranges from 25w to 230w. The thermal conductivity of different materials is different. The thermal conductivity of alumina ceramic circuit boards is 25~30w, and the thermal conductivity of aluminum nitride ceramic circuit boards is above 170w. The thermal conductivity of silicon dioxide ceramic substrate is about 85w. In addition, there are silicon carbide ceramic circuit boards, and the thermal conductivity of diamond ceramic circuit boards is greater than 230w.

2. Excellent insulation performance

The ceramic circuit board not only conducts heat well, but also has the insulation of the ceramic itself. The insulation of the ceramic circuit board is so good that the ceramic circuit board does not need to be an insulating layer. The ceramic base itself is also an insulating layer as a dielectric layer. The insulation resistivity is at the 10 minus 14th power.

3. Outstanding high-frequency characteristics

The ceramic base used in ceramic circuit boards has small dielectric constant, low dielectric loss, and strong reliability. It is more popular for high-frequency communication products.

4. High temperature resistance, corrosion resistance, pressure resistance, inorganic environmental protection

Disadvantages of ceramic circuit boards: easy to break, high production cost, not suitable for large-scale ceramic circuit boards.

The advantages of ceramic circuit boards are very obvious. In many product fields that require high thermal conductivity, high temperature resistance, high insulation, and high frequency performance, ceramic circuit boards are very popular, and the prospects for ceramic circuit boards are also very good.