Multilayer PCBs became an integral factor with the expectation of developing more conductive layers in PCB than 1-layer or 2-layer boards. The Multilayer PCBs accompany a blend of 1-layer or 2-layer PCB and provide chance to interface more electronic parts in the less space. These PCBs are created from some conductive layers, including protected material amongst them. Multilayer PCBs are generally manufactured in rigid structure, since creating multilayer PCB in flexible structure is hard to accomplish and it additionally brings about more expense than rigid PCBs. Rather than utilizing flexible multilayer PCBs, the greater part of the experts favor utilizing mixes of 1 or 2 sided board which are powerful in a large portion of applications and are less expensive than multi flex boards.
 From perspective of technical purposes, multilayer circuit boards provide some advantages in electronic design. These advantages of the multilayer PCBs are including: 
More Effective and Powerful. Multilayer circuit boards are incredibly high-thickness assemblies, joining multi-layers into a one PCB.These close-quarters empower PCBs become more connective, also their natural electrical properties permit them to accomplish more prominent limit and speed regardless of their littler size.
Improved Durability. Multilayer circuit boards will in general be sturdy by their inclination. Not only implement these multilayer circuit boards need to keep their own weight, yet they should likewise have the option to deal with the warmth and constrain used to tie them together. In addition of these variables, multilayer PCBs utilize multi-layers of protection between circuit-layers, restricting everything along with prepreg holding agent and also protective materials.
High-Quality Boards. Because of the measure of work plus arranging that have to continue into the making of multilayer circuit boards, these sorts of PCBs will in general be preferred in quality over single and 2-layer PCBs. They likewise will in general be more solid subsequently.
Smaller Size. The most unmistakable and commended advantages of utilizing multilayer PCBs resides in the size. Due to the layered design, the multilayer circuit boards are naturally littler than different PCBs with comparable usefulness. This provides a significant advantage to current hardware, since the current pattern is moving in the direction of littler, more conservative but more remarkable devices like cell phones, tablets, laptops, and wearables.
• Lightweight Structure. With smaller circuit boards turns less weight, particularly as the different connectors needed to inter split one and two-layered PCBs are wiped out for a multi-layered design. This, once more, is useful for current hardware, which are intended more for versatility.
Not Using Multiple Connection Point. Multilayer circuit boards are intended to fill in as a solitary unit, instead of couple with other electronic circuit parts. Accordingly, they have a single-connection point, instead of multiple-connection points needed toward utilize numerous one-layer PCBs. This ends up being an advantage in electronic item configuration too since they just need to incorporate a single-connection point in last item. This is especially valuable for little hardware and devices designed to limit weight and size.
Enabled Flexibility. In spite of the fact that this doesn’t matter to all of the multilayer circuit board assemblies, some utilization flexible development procedures, bringing about a flex multilayer circuit board. This could be a profoundly attractive characteristic for applications that mild flexing and bending may happen on a semi-normal premise. Once more, this doesn’t have any significant bearing to all of the multilayer circuit boards, and the more layers joined into a flexible PCB, the less flexible PCB becomes.