What are the classification and advantages of PCB metal substrates?

At present, the PCB circuit board products on the market are mainly divided into three types in terms of materials: ordinary substrates, metal substrates and ceramic substrates. Below, I will share with you:

What are the classification and advantages of metal substrates?

First, Classification of metal substrates:

There are three main types of metal substrates: aluminum substrates, copper substrates, and iron substrates. The focus here is on aluminum substrates and copper substrates.

Aluminum substrate is currently the most used substrate among metal substrates, and has good thermal conductivity, electrical insulation properties and mechanical processing properties. Aluminum substrates are divided into flexible aluminum substrates, hybrid aluminum aluminum substrates, multi-layer aluminum substrates, through-hole aluminum substrates, etc.

The copper substrate is the most expensive type of metal substrate, and its thermal conductivity is many times better than that of the aluminum substrate and the iron substrate. Copper substrates are divided into immersion gold copper substrates, silver-plated copper substrates, tin-sprayed copper substrates, and anti-oxidation copper substrates.

Second, the advantages of metal substrates:

1. Thermal expansion

The metal substrate can effectively solve the problem of heat dissipation, so that the problem of thermal expansion and contraction of different materials on the circuit board can be alleviated, and the durability and reliability of electronic equipment can be improved.

2. Heat dissipation

At present, many double-sided and multi-layer boards have high density and high power, and it is difficult to dissipate heat; and metal-based printed boards can solve this heat dissipation problem.

3. Dimensional stability

Metal substrate dimensions are much more stable than sheets of insulating material.

4. Wide range of applications

Aluminum substrates are used in a wide range of applications, such as input and output amplifiers for audio equipment, balanced amplifiers; computer CPU board floppy disk drives, power supply devices; automotive electronic regulators, igniters, power controllers; lamps and lanterns LED lights, etc.

Copper substrates are mainly suitable for high-frequency circuits, including heat dissipation of precision communication equipment in areas with large changes in high and low temperatures.

The above is the knowledge about the classification of metal substrates and their advantages, hope to help you.