20 Layer PCB: Fabrication, Application, Manufacturing Process and More

Before you choose a 20 layer PCB, there are some aspects you should understand properly. This includes the design, fabrication, quality compliance, and identifying it properly against others.

In this article, you will get all the necessary information you’ve been searching for, which will help you in choosing the best 20 layer PCB. If you wish to know or learn more, please continue reading.

What Does 20 Layer PCB Mean?

20 layer PCBs is a multilayer printed circuit board having 20 copper layers, which alternates with a substrate called epoxy resin.

Some of the major materials that are useful in the manufacturing of the 20 layer PCB include silkscreen, substrates, solder mask, and copper.

20 Layer PCB Applications

You can apply the 20 layer PCBs in six major areas. Let’s quickly discuss them.

Consumer electronics

20 layer pcbs are useful in making those commonly used electronics in offices or in homes. These include calculators, music players, watches, smartphones etc. It is also useful in making electric kettle, washing machine, LED bulbs, and kitchen appliances.

Telecommunication electronics

20 layer pcbs are useful in the making  of GPRS, radar electronics, communication towers, computer servers, and satellites. Other applications using 20 layer pcb includes LNA, filter, mixers, power amplifier, sonar antenna, PLLS, and Attenuators.


20 layer pcbs are useful in the production of computers and other parts like power supplies, graphic cards, EEPROMs, and motherboards. Others include ADCs, computer mouse, keyboard, and circuits for image processing.


Operations carried out in industries are usually prone to pressure, dust, temperature, humidity, and shock, and this is why the 20 layer PCB is very reliable. Also, different industrial applications like car manufacturing, robots, and conveyor belts all use this PCB.

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Medical devices

20 layer pcb are useful both in testing and monitoring medical machines. Furthermore, 20 layer pcbs are useful in equipment for blood pressure measurement, device used in monitoring infrared temperature, electronic machine for sugar testing, and more.

Defense, Aerospace, and Military

20 layer PCBs are useful in military machines such as surveillance, radar, unarmed ground and aerial vehicles. Also, they are useful for rail guns, navigation systems, artificial intelligence, and automated guns.

What Does a 20 Layer PCB Stackup Mean?

20 layer pcb stackup has to do with the 20 layers of insulating and copper layers, which forms the printed circuit board before the layout of the board.

These stackups play a major role in reducing the vulnerability of the circuit to outside noise. Also, crosstalk, impedance, and radiation issues, which happen in high-speed printed circuit board layers can lessen using the stackup.

Fabrication Process of 20 Layer PCB

You can fabricate the 20 layer printed circuit board using some processes. Also, all the processes deal with the assembling, as well as stacking of all 20 layers placed together via an insulating material added between each layer of copper. Let’s quickly consider these processes.

Imaging Process

Here, you can achieve the actualization of the digital design on the board. Next, is its transfer from your software to your circuit board.

Etching Process

This process involves the removal of extra metal from the printed circuit board making use of industrial solvent.

Lamination of the 20-layer

Here, with a pressing machine, you combine the 20 layers of the PCB. Eventually, you generate one board.


The process of machining this printed circuit board, you drill the via and through-hole. This drilling ensures the connections present between all the layers of the PCB.


During the fabrication process stage, you apply the metal finish to the via and through-hole.

20 Layer PCB Quality Standards

There are some quality standards that are acceptable for the 20 layer PCB. These are outlines below.

  • The PCB has to function at high speed and must also have high capacity
  • Its thermal resistance must be excellent
  • This PCB must be ideal for manufacturing powerful, portable, and even small devices
  • There must be an alternation of 20 layers of copper with substrates

Design Specifications of the 20 Layer PCB

The 20 layer PCB comes with some design specifications.

  • It should have 20 layers
  • Do the design to have a high density and must work with high speed.
  • It must support both the buried and blinded vias
  • This PCB must have a minimum of 0.5mm BGA pin-pith
  • The minimum separation and width for the routing is 4mil.
  • The minimum hole size of the via must be 8mil
  • It must possess a signal differential (high speed) of 10 GHz.

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Manufacturing Process of a 20 Layer PCB

There are seven major steps involved in the manufacturing of 20 layer printed circuit boards. Let’s consider them.

  • The first step is to analyze the requirements for the board and then select the component of the printed circuit board.
  • Second, conduct an in-system design of the front end
  • Next, is the photo tool initiation. You can achieve this by transferring the software’s image to the printed circuit board.
  • Fourth is the printing of the PCB’s inner layers
  • Next is removing unwanted copper from your board through etching
  • Step six involves the alignment f the PCB’s inner layers. You can achieve this by doing the punching registration.
  • Lastly, take your completed printed circuit board and conduct an optical inspection.

Is the 20 Layer Printed Circuit Board Cost Effective?

20 layer PCBs are cost-effective and for good reason. This is due to its small size of board. Furthermore, it has high density.

Since you can arrange its components in a small circuit board, this saves some materials. Also, because you can manufacture it by stacking up to 20 layers, this PCB is durable and strong. Also, this durability helps you save some money, which you would have spent on frequent repairs which may happen due to breakages, as well as other damages.


20 layer PCBs are very reliable and are useful in different applications. It also saves you some money because it uses a small circuit board and it is durable enough to withstand damages. If you still have questions after reading through, feel free to contact us.

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