Are 40 Layer PCBs Really Worth It?

There has been an increasing demand for advanced PCBs such as multilayer pcbs, as well as a rising need for lighter and smaller boards for numerous applications, which includes military equipment, medical devices, and smartphones.

Have you wondered what a 40 layer PCB looks like and what benefits they offer? Please read this article, because you will learn even more, including its pitfalls.

What is a 40 Layer PCB?

A 40 layer PCB is a printed circuit board having at least three semiconducting layers of copper. This semiconducting foil eventually becomes versatile layers of electrical circuit boards with multiple sides.

With prepreg used as an isolating layer, you bond the internal layers together and auction them on a center. Then you place these layers in a direction, which utilizes both printed circuit boards on top of components having electrical connectors or supplementary circuits in the circuit board’s inner layer.

For the electrical connector’s roof, which are usually found between the 40 layers PCB’s diverse layers, vias are useful. Many products make use of 40 layer printed circuit boards. These includes satellite systems, GPS, in-car arrangements, medical equipment, and computer systems

The expert 40 layer PCB manufacturers and those involved in the assembling of PCB, serve to create a great resource on matters relating to PCB. Information found here includes fabrication issues, tech trends, PCB patterns and more.

Why Choose 40 Layer PCB?

There are several reasons why you should choose multilayer printed circuit boards like the 40 layer Pcb.

  • A reduction in the space and weight of the circuit board
  • Greater assembly density
  • High speed or capacity in smaller footprints
  • Increase in functionality
  • A reduction or elimination of the connectors needed for multiple printed circuit board

Applications of the 40 Layer PCB

You can apply the 40 layer printed circuit boards in numerous fields and areas. Some of these areas include:

  • GPS – Global positioning systems
  • Satellite systems
  • Medical equipment
  • Atomic accelerators
  • Equipment for space probing
  • Industrial controls
  • Communication systems
  • Computer systems like file servers necessary for storage of data
  • Nuclear Detection

40 Layer PCB Benefits

Below are the benefits of the 40 layer PCB. In contrast to the one layer type, 40 layer printed circuit boards are even more noticed. Let’s quickly consider them.

Higher density for assemblage

40 layer printed circuit boards use layering to procreate its density. This density allows better capability, greater functionality, as well as speed, despite its reduced size.


The 40 layer PCB has less demand for more elements and connectors. This is why it is lightweight. Asides from this, 40 layer PCBs can achieve much work doing so with its small size and less connecting factors, thereby reducing the weight. This is why you should consider 40 layer rigid flex pcbs for smaller electronics (pocket-size), where the weight of the material becomes an issue.

Smaller size

Compared to the 1 layer pcb, 40 layer pcb has a smaller size. They step up their surface area through the increment in layers, reducing the gross size. With this, you get a 40 layer printed circuit board with higher capacity, which is useful in very modest devices.

Increased functionality

40 layer pcbs generally have great functionality. With its high EMI screening, and better quality of design, the 40 layer printed circuit boards can achieve so much even with their small weights and little size.

If you seek to create a lightweight circuit board, where quality stays important, then a 40 layer printed circuit board is surely the best option. This same way, if weight and sizing are not the major factors in the production design, then a one or two layer printed circuit board design is more applicable for you.

40 Layer PCB: Disadvantages

Though 40 layer printed circuit boards have numerous benefits, they don’t serve all applications. Let’s consider some of these disadvantages. Note that none of these pitfalls affect the versatility of a 40 layer PCB. They may be more expensive than the single layer type, they offer more benefits.

It is expensive

For all the fabrication process stages, 40 layer thin printed circuit boards are more expensive than the single and double layer type. Planning them could be difficult and takes so much time. The fabricating process is also very complex. During this fabrication process, once you make a mistake, it is extremely difficult to make amends. This leads to either extra costs of labor or waste of materials.

The production is complex

Producing 40 layer PCBs is very challenging. Expect more manufacturing processes and pattern times. This is very necessary because when there are little defects in the fabrication or pattern of the printed circuit board, this could make it worthless.

Time needed for production

With expanded complexity, expect more demands in your manufacturing. Developing each of the circuit boards requires much time. This leads to added labor costs. Furthermore, the time required becomes longer.

You need an expert designer

Before you get your 40 layer PCB, you should have a comprehensive and detailed design. This will not be an easy task if you have never done this before. This printed circuit board needs some interconnection between the layers, which is necessary to mitigate resistivity and crosstalk issues.

40 Layer PCB Manufacturers

Few companies offer to serve as 40 layer PCB manufacturers to serve very complicated applications like medical, defense force, commercial, and aerospace applications. This is because these manufacturers build these 40 layer PCBs with focus on dependability and quality.


By now, you have gained much knowledge regarding the 40 layer PCB. It is clear that 40 layer PCB offers more benefits compared to the single or double layer type. However, despite its numerous benefits and applications in various fields, it comes with some disadvantages. However, if you can cope with these drawbacks, having your 40 layer PCB will be a great acquisition. Furthermore, as technology becomes more advanced, the machinery and processes involved in production will eventually prove to be less expensive, as new and modern technologies appear in the industry.

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