Any printed circuit board has the problem of matching and assembling with other structural parts, so the shape and size of the printed circuit board must be based on the overall structure of the product.
Multilayer PCB refers to multilayer circuit boards used in electrical products. Multilayer boards use more single-sided or double-sided wiring boards.
Multilayer PCB refers to a multilayer circuit board used in electrical products. It covers a wide range of fields, including home appliances, computer peripherals, communications, optoelectronic equipment, instruments and meters, toys, aerospace, military industry, medical products, LED lighting and other industries.
Much of the favoritism toward multilayer PCBs lies in industry trends. With electronics progressing ever toward miniaturization yet multi-functional options, the internal components of those electronics must follow the same trend.
The advantages and comparisons discussed above beg the question: what's the use of multilayer PCBs in real world? The answer is just about any use.