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What is the difference between PCB circuit board and aluminum substrate?

September 7, 2022

what is a circuit board?
Circuit boards generally refer to printed circuit boards. Printed circuit board {PCB circuit board}, also known as printed circuit board, is a provider of electrical connections for electronic components. Its development has a history of more than 100 years; its design is mainly layout design; the main advantage of using circuit boards is to greatly reduce wiring and assembly errors, and improve the automation level and production labor rate.
According to the number of circuit boards, it can be divided into single-sided circuit boards, double-sided circuit boards, four-layer circuit boards, six-layer circuit boards and other multi-layer circuit boards. Since the printed circuit board is not a general terminal product, the definition of the name is slightly confusing. For example, the motherboard for personal computers is called the motherboard, but cannot be directly called the circuit board. Although there are circuit boards in the motherboard, but They are not the same, so the two are related but cannot be said to be the same when assessing the industry. Another example: Because there are integrated circuit parts loaded on the circuit board, the news media calls it an IC board, but in fact it is not the same as a printed circuit board. When we usually speak of a printed circuit board, we mean a bare board - that is, a circuit board with no components on it.

 

What is an aluminum substrate
The aluminum substrate is a metal-based copper clad laminate with good heat dissipation function. Generally, the single-sided aluminum substrate is composed of a three-layer structure, which are a circuit layer (copper foil), an insulating layer and a metal base layer. Commonly found in LED lighting products. There are positive and negative sides, the white side is for soldering the LED pins, and the other side is aluminum, which is generally applied with thermal paste and then contacts the thermally conductive part. There are also ceramic substrates, etc.

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