At present, PCB products on the market are mainly divided into three types in terms of materials: ordinary substrates, metal substrates and ceramic substrates. Next, the circuit board factory will share with you: what are the classification and advantages of metal substrates?
1、 Classification of metal substrates:
There are three kinds of metal substrates: aluminum substrate, copper substrate and iron substrate. The aluminum substrate and copper substrate are mainly analyzed here.
Aluminum substrate is the most used substrate in metal substrates at present, which has good thermal conductivity, electrical insulation and machining performance. Aluminum substrates are divided into flexible aluminum substrates, mixed aluminum substrates, multilayer aluminum substrates, through-hole aluminum substrates, etc.
According to the circuit board factory, copper substrate is the most expensive one among metal substrates, and its heat conduction effect is many times better than aluminum substrate and iron substrate. Copper substrates are divided into gold-plated copper substrates, silver plated copper substrates, tin sprayed copper substrates, antioxidant copper substrates, etc.
1. Thermal expansibility
The metal substrate can effectively solve the problem of heat dissipation, so as to alleviate the problem of thermal expansion and cold contraction of different substances of components on the circuit board, and improve the durability and reliability of electronic equipment.
2. Heat dissipation
According to the circuit board factory, at present, many double-sided boards and multilayer boards have high density and power, and it is difficult to dissipate heat; Metal based printed boards can solve this heat dissipation problem.
3. Dimensional stability
The size of metal substrate is much more stable than that of insulating material.
4. Wide range of applications
Aluminum substrate has a wide range of applications, such as input and output amplifiers of audio equipment, balance amplifiers; Computer CPU board, floppy disk drive, power supply device; Automobile electronic regulator, igniter, power controller; LED lamps for lamp decoration, etc.
Copper substrates are mainly suitable for high-frequency circuits, including the heat dissipation of precision communication equipment in areas with large changes in high and low temperatures.