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What is a 6-layer PCB stackup? How to design?


What is 6-Layer PCB?

A 6-layer PCB consists of several different types of conductive traces separated from each other by an insulator. Depending on the complexity of the circuitry, there may be one layer, two, or several layers.

Single-layer PCBs are typically used for low-cost consumer electronics products. Double-sided PCBs are often used for industrial equipment and computer peripherals. Triple-layered PCBs are usually used for high-end consumer electronics products.

Six-layer PCBs are produced using three types of materials: conductive metal, dielectric insulation, and ground plane. Each layer consists of these components.What-is-6-Layer-PCB-and-layers

What is the six-layer of PCB stackup?

The 6-layer PCB stackup is one of the most important aspects of designing electronic circuits. The 6-layer PCB stackup helps to restrain EMI between several layers and allows fine-pitch components with a high net count. This type of PCB improves EMI and as well as provides greater routing for high and low-speed signals. The two internal layers route high-speed signals and the two external layers route low-speed signals.

Below, we will list and explain what each layer does and how it affects signal integrity:
● Ground Plane
● Dielectric Insulation
● Signal Layer
● Power Layer
● Ground Layer
● Metal Frame

Ground Plane

A ground plane is an electrical conductor providing a reference potential for all other circuit parts. It can be made from any conducting material, but aluminum is often used because it’s easy to work with and inexpensive.

When you run a wire through your house, it usually goes through a hole in the wall called a “plenum.” This is where air flows through pipes and ducts. Plenums have holes in them so that air can flow freely. In a building, plenums are also referred to as “return currents.”

In electronics, return currents are known as ground planes. These are conductors that connect every part of the circuit together. If there’s no ground plane, then the entire circuit could float.

Dielectric Insulation

This is the second layer of the PCB. It keeps everything connected while providing some protection against shorting out. The most common types of insulation include epoxy resin, fiberglass, polyimide film, and polyester film.

Signal Layer

This is the third layer of the PCB. On top of this layer is the signal wiring. Wires are attached to pads on the surface of the board. When you solder wires onto the board, they make contact with the pads.

Power Layer

This is the fourth layer of the PCB. The power supply connects to the power pins on the bottom side of the board. The power pins are located near the edge of the board.

Metal Frame

This is the fifth layer of the PCB. This is where the whole thing comes together. All of the components are soldered into place using a reflow oven.

Ground Layer

The ground layer is the sixth layer of the PCB. There’s nothing special about this layer. It just serves as a connection point between the ground plane and the metal frame.

It is very important that you know the number of power and ground planes to be used for your PCB design. However, this depends on the application requirements. For example, if you require a circuit to control signals, then the number of power and ground planes will increase.

Is a six layer PCB good?

Is a six layer PCB goodYes! A six-layer PCB is excellent for many reasons. First, it gives you more space for components. You can fit more chips on the same size board than you would if you only worked with two or four layers.Second, it allows you to use thinner traces. Traces are the lines that carry signals around the board. Thinner traces mean less resistance, which means faster speeds.

Third, it makes it easier to route signals. Because the board has fewer layers, it’s much easier to trace the connections.Fourth, it’s cheaper. Since you don’t need to buy extra materials like copper foil, you can save money by going with a six-layer PCB instead of a five-layer PCB.

Where Is 6-layer PCB used for?

Six-layer PCBs are commonly used for high-speed applications such as microprocessors. They’re also good for digital logic circuits.The main advantage of a six-layer PCB is that it offers more room for components. This means that you can put more chips on the same board.Another benefit is that you can use thinner traces. Thin traces reduce the amount of resistance, which increases speed.

How’s the 6-layer PCB stackup process?

The six-layer stackup process consists of four layers of copper, two layers of polyimide, one layer of solder mask, and one layer of photoresist. Each layer has specific purposes such as protecting the circuit board from corrosion, preventing shorts between components, and making the surface smooth for soldering.A typical 6-layer PCB stackup process includes:
How's the 6-layer PCB stackup process1. Design
You first design the layout of the PCB. You do this by drawing the schematic diagram. Then, you create a bill of material (BOM).
2. Fabrication
Next, you send the BOM to the fabrication facility. Once the parts arrive at the factory, the manufacturer will assemble the boards.
3. Testing
After the assembly is complete, the manufacturer tests each board. This ensures that all of the components work properly.
4. Assembly
Finally, the manufacturer assembles your product.

Consideration about 6-layer PCB stackup design

When designing a six-layer PCB, there are several things to keep in mind. Here are three tips to help you get started:
Consideration-about-6-layer-PCB-stackup-design1. Keep Your Board Small
If you have a small project, then you should consider making a single-sided board. Single-sided boards are smaller than double-sided boards. However, they take up more space.

2. Consider Using Different Materials
There are different types of materials available when it comes to building a PCB. Each type has its own advantages and disadvantages. For example, FR4 is an excellent choice for a low-cost PCB. But, it doesn’t provide enough shielding against electromagnetic interference. On the other hand, Rogers RT/RFR4 provides better EMI protection.

3. Use High-Speed Components
High-speed components are essential for any kind of electronic device. If you want to build a reliable circuit, then you must make sure that you use high-quality components.

What’s the 6-layer PCB assembly process?

A six-layer printed circuit board assembly process consists of four layers of copper foil laminated together with epoxy resin, followed by two layers of glass cloth impregnated with epoxy resin. This combination forms the core of the board. Next, holes for components are drilled through the board using a drill press. Finally, solder paste is applied to the surface of the board, and components are placed into the holes.

How to choose a good 6-layer PCB stackup fabrication and assembly manufacturer?

Choosing a good PCB manufacturing company can be tricky. There are many factors to consider before choosing one. Here are some questions to ask yourself:

good 6-layer PCB stackup fabrication and assembly manufacturer

What Type Of PCB Are You Making?

Do you need a prototype or production PCB? Do you need a custom PCB? How many layers does your PCB require?

What Size And Complexity Is Your Project?

Does your project involve complex circuitry? Will you be assembling multiple boards at once?

How Many Boards Are Required?

Will you be ordering just one board or hundreds?

What Quality Standards Should I Expect From My PCB Manufacturing Company?

Is your PCB manufacturer ISO 9001 certified? Can they offer a warranty?

Who Else Has Used Them Before?

Have you used their services in the past? Have they delivered quality products?

How Long Have They Been In Business?

Are they a reputable company or not?

What Other Services Do They Offer?

Does your PCB fabrication company offer design services? Do they also do PCB prototyping?

What Service Level Agreement (SLA) Do They Provide?

You need a manufacturer that can provide a sufficient and satisfactory answer to all of these questions. That's how you know what company to choose. Preferably, I would strongly recommend IBE Electronics Co., Ltd.

FAQ about 6-layer PCB stackup

Most frequent questions and answers

How thick Is a 6-layer PCB?

Thickness refers to how thick the conductive layer is. The thickness of a PCB depends on what type of component you’re using.

Here are some examples of common PCB thicknesses:

0.5mm – 1.0mm for general-purpose PCBs
2.0mm – 3.0mm for power supplies
4.0mm – 5.0mm for high-power devices
7.0mm – 10.0mm for high-frequency devices

How much does the 6-layer PCB stackup cost?

The cost of a six-layer board varies depending on the size and complexity of the project. A simple two-layer board costs about $10 per square foot.

However, if you go with a four- or five-layer board, then the price goes up. It typically costs between $20 and $40 per square foot.


Established in 2005, IBE Electronics Co., Ltd is an electronics company that offers world-class PCBA/ODM/OEM, and final assembly services. With more than 17 years of successful experience, they have been able to establish a reputation as a reliable partner for both large and small companies.

They specialize in providing high-quality PCB/PCBA and electronic assemblies to customers worldwide. Their team includes experienced engineers who are dedicated to meeting customer needs.

If you want to know more about the 6-layer PCB stackup, reach out to IBE today for your PCB/PCBA needs. You can never go wrong !

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