Multilayer PCB
This type of PCB is made up of more than two layers that is why it is called Multilayer PCB. It has using conductive copper foils and fibrous material, pressed and bonded together.
Multilayer is the most complicated printed circuit board by design and by production but it is the high speed by functionally. Currently, up to 40 layers of PCB is able to be done by using the latest machinery. These types of PCB are largely utilized in professional electronic equipment like computers, mobile, medical devices, aerospace, and defense application devices.
Some advantages of these types of PCB; are higher accumulation density, decrease size, increase flexibility, easier incorporation-controlled electric-resistance features, reduced need for interconnection, etc.