What is copper substrate and aluminum substrate, copper substrate and aluminum substrate difference

Copper substrate can be said to be the most expensive type of metal substrate.2 oz copper thickness in mm It has excellent thermal conductivity, which is much better compared to aluminum and iron substrates. Therefore, copper substrate is suitable for high-frequency circuits as well as high and low temperature changes in the region and the heat dissipation needs of precision communication equipment, and it is also widely used in the building decoration industry.

Aluminum substrate is a metal-based copper-clad plate with good heat dissipation performance. Generally, a single panel consists of a three-layer structure, which are the circuit layer (copper foil), the insulation layer and the metal base layer. In high-end product applications, there are also aluminum substrates designed as double-sided panels with a structure of circuit layer, insulation layer,plated through hole vs via aluminum base layer, insulation layer, and circuit layer. Additionally, in very few applications, aluminum substrates are also designed as multilayers, which can be made by laminating a regular multilayer board with an insulating layer and an aluminum base layer.

There are some differences between copper and aluminum substrates:

1. thermal performance, aluminum substrate has good thermal performance, this PCB board in the LED lighting products is very common.

2. price, aluminum substrate relative to the copper substrate price is lower.

3. processing ability, copper substrate can be metallized hole processing, while the aluminum substrate can not be perforated operation.

4. Due to the large difference between the modulus of elasticity of copper and aluminum, the warpage and shrinkage of copper substrate will be smaller than that of aluminum substrate.

In summary, there are some differences between copper and aluminum substrates in terms of thermal conductivity, heat dissipation performance, price and processing capability. According to the specific needs and applications, you can choose the appropriate material to meet the specific requirements.

aluminum substrates PCB board copper substrate

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