What does it mean to Fabricate a 42 Layer PCB?

The advanced 42 layer PCB is specially fabricated to meet the needs of some applications. This board is very reliable when it comes to functionality and performance. In this article, we will discuss what a 42 layer board offers.

What is a 42 Layer PCB?

This is an advanced multilayer board that features 42 layers of copper. A 42 layer PCB board is ideal for use in high-frequency applications. It is an even layered board in which layers are evenly distributed. Advanced electronics need multilayer boards. Therefore, electronic engineers use the 42 layer PCB to design advanced electronics.

The 42 layer PCB comprises more than 20 conductive copper foil layers. Manufacturers bury these copper foil layers in different layers. Also, insulation is glued between each layer of the board. Multilayer boards feature double-sided PCB with many layers.

Manufacturers use several vias on the 42 layer PCB to achieve electrical connections. These vias include PTH vias, blind vias, and buried vias. A 42 layer board features greater assembly density. A multilayer PCB with more than 20 conductive layers provides solutions to circuit failure.

What is a 42 Layer PCB Stackup?

A 42 layer PCB stackup refers to layer arrangement on the circuit board. Stackup is also referred to as build up. It is an important aspect of a 42 layer PCB design. The stackup comprises several layers like ground planes, power planes, and signal layers.

There are more than 20 routing layers in a 42 layer PCB stackup. The stackup determines the EMC (electromagnetic compatibility) performance of a 42 layer board. A good layer stackup will promote the EMC of your design.

In a stackup, the PCB manufacturer arranges layers of insulators and coppers. A good PCB stackup impacts the functionality of a multilayer board. In a 42 layer stackup, the routing layers serve s the top and bottom layer.


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Advantages of a 42 Layer PCB

High levels of durability

A 42 layer PCB is very durable. This board can stand the test of time. Therefore, they are commonly used in high-performance applications.

High functionality

This circuit board features more layers of copper and as such, it is more functional. This board is well-suited for high-density and high-speed applications.

Compact design

The 42 layer PCB has a compact design. It is lightweight and is ideal for functional machines. Due to its compact design, it is available in modern electronic devices.

High signal transmission

This is another advantage of the 42 layer PCB. It features more copper layers. This makes it transmit signals very fast.

Disadvantages of a 42 Layer PCB

Although a 42 layer features some benefits, there are some downsides. Below are some disadvantages of this PCB.

High cost of manufacturing

The more the number of layers in a board, the higher the manufacturing cost. A 42 layer PCB requires more cost to manufacture. This is because of its complex manufacturing process. Manufacturers need special materials and machines to fabricate this board.

Complex production

The production process of a 42 layer board is very complex. This is because it comprises many layers of copper. Also, manufacturers need to pay careful attention to each manufacturing process.

Longer Lead time

Yes, you will need to wait for a longer period to get this board. Since the production process is complex, it takes more time to fabricate. Also, getting the required materials and high-end machines takes a lot of time.

Limited supply

This is another disadvantage of this board. It is difficult to produce and as such, it is limited in supply. Only a few manufacturers design this board. Therefore, it may be a bit scarce.

What Type of Boards can you Fabricate with a 42 Layer Board?

A 42 layer board can be used to fabricate different types of PCBs like:

Flexible PCB

Manufacturers use this board to fabricate flexible boards. Some applications demand flexible boards that incorporate a 42 layer PCB.

Rigid PCB

Rigid boards are commonly used in high-performance applications. For instance, the industrial system uses a 42 layer rigid PCB for fabricating heavy-duty machines.

Rigid-flex PCB

This is also another type of board that features 42 layers of copper. Rigid-flex PCBs are widely used in consumer electronics, medical devices, and more.

Materials Used for Fabricating a 42 Layer PCB

The 42 layer PCB comprises different materials. Each of these materials has an impact on the functionality of the board.

Copper foil

To fabricate the outer layer of 42 layer PCB, you will need sheets of copper foil. This material serves as the primary conductive component that transmits signals and power through the board.


These are glass materials featuring a layer of copper on each side. The manufacturer will etch the signal layers and inner plane on the laminate.


In a 42 layer PCB, there are different layers of prepreg. This prepreg serves as the insulating material on the board. Prepreg comprises fiberglass cloth coated in resin. This material is available in different designs.


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Factors to Consider When Fabricating a 42 Layer PCB

The fabrication process of a 42 layer PCB is very complex. Therefore, you need to have a picture of the process in mind. However, you need to consider some necessary factors.

Design schematic

This factor considers all aspects of the layer stackup. Here, you will need to look into the placement of components. Also, you will need to consider how you will handle the PCB stackup.

Power integrity

Here, you will have to consider the current flow that passes through at low voltage levels. Also, you will have to save more power.

Breakout pattern

It is important you strategize how you break out and connect all signals on a PCB layout stackup. You must do this before engaging in the signal verification process of the 42 layer PCB

Signal integrity

Manufacturers need to develop the best designs of electronic devices. Therefore, signal integrity is an important factor to consider. Also, you need to evaluate the signals that pass through the PCB and how they operate.


Vias are an important part of a multilayer PCB. A 42 layer PCB features different types of vias. These vias help to mount components on a board. Choose the appropriate vias that are compatible with the placement of components on the PCB.

Applications of 42 Layer PCB

The 42 layer PCB is an ideal board for high-performance applications. You will find a 42 layer PCB in heavy machines. Below are some applications that feature a 42 layer PCB:

  • Satellite systems
  • GPS technology
  • Cell phone repeaters
  • Computer systems like file servers
  • Industrial controls
  • Medical devices like test equipment in laboratories
  • Automobiles


A 42 layer PCB is beneficial in several ways. This board is commonly used in the electronics industry. It is a game-changer in most industries.

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