The layer count of PCB (Печатная плата) determines its manufacturing technology difficulty and Производство печатных плат cost. PCB boards can be briefly classified into two categories: single-layer (single-sided) PCB and double-layer (double-sided) печатная плата. When it comes to high-end electronic products, a couple of signal layers can be added to the inside of PCB apart from surface routing due to some limitations in terms of board real estate and board design. During the manufacturing procedure, after routing for each layer has been finished with positioning and lamination completed, multiple layers of signals will be pressed into a single board that is called multilayer PCB. Поэтому, a multilayer PCB refers to any piece of circuit board containing more than two layers of signals. Multilayer PCBs can be multilayer rigid PCB, multilayer flex PCB и flex-rigid multilayer PCB.Изготовление многослойных печатных плат.

Necessity of Multilayer PCB

Due to the increasing use of IC (Интегральная схема) package, interconnection lines become so dense that multi-substrate boards become necessary. Кроме того, some design problems, like noise, stray capacitance, crosstalk etc., are so protruding that should be solved through multilayer resolution. As a result, PCB design has to make sure that signal lines should be minimized and parallel circuits should be avoided, which is apparently difficult to be obtained in either single-sided or double-sided design. Поэтому, multilayer PCBs come into being for the acquisition of perfect performance of circuits.

The original aim of multilayer PCB is to provide more freedom in terms of routing for circuits that are complex and/or sensitive to noise. There are at least three layers in a multilayer PCB and two layers are external with the left layer(s) synthesized inside insulating plate. The electrical connection in a multilayer PCB derives from plated through hole on the cross section of circuit board.

Advantages of Multilayer PCB

• Smaller size
• Lower weight
• Higher speed of signal transmission
• Constantly low impedance
• Better shielding effect
• Higher assembly density

Multilayer PCBs can be served in so many industries including consumer electronics, medical care, аэрокосмический, telecommunications, военный, автомобильный, wearables, IoT etc. based on its benefits. Alcanta PCB has been striving to provide high-quality multilayer PCBs for customers with full concerns in terms of design, cost and lead time. Contact us and follow rainbows with Alcanta PCB!