What are the Advantages of Multi-layer PCB and Single-sided or Double-sided PCB?
Multilayer circuit boards are actually formed by laminating and bonding several etched single or double panels. So, what are the advantages of multilayer circuit boards compared with single layer circuit boards and double layer circuit boards? Let me share it with you below.
1. Multilayer circuit boards have high assembly density and small size; as the volume of electronic products becomes smaller and smaller, the demand for multilayer circuit boards is also increasing.
2. The multi-layer pcb board is convenient for wiring, the wiring length is greatly shortened, and the connection between components is shortened, thereby increasing the speed of signal transmission.
3. For high-frequency circuits, after adding the ground layer, the signal line will form a constant low impedance to the ground layer, the circuit impedance is greatly reduced, and the shielding effect is better.
4. For electronic products with high heat dissipation function requirements, multilayer circuit boards can be provided with a metal core heat dissipation layer, which is convenient to meet the needs of special functions such as shielding and heat dissipation.
In terms of performance, multi-layer Integrated circuit boards are better than Single-sided or Double-sided PCB, but the higher the number of layers, the greater the production cost, the relatively long processing time, and the more complicated quality inspection.
The most common multi-layer Electronic circuit board is the four- or six-layer board. The difference between the four-layer board and the six-layer board is that there are two more internal signal layers between the middle layer, the ground layer and the power layer. The six-layer board is more than the four-layer board. The laminate should be thicker. Single and double-layer boards are easy to distinguish. Hold the board and look at the light. Except for the wiring on both sides, the rest is transparent. But for the four-layer board and the six-layer board, if there is no corresponding mark on the board, it is not so easy to make a simple distinction.
Generally speaking, High-density multi-layer circuit boards have been widely used in the manufacture of electronic products due to their design flexibility, economic superiority, stable electrical performance and reliability.