6 Layer PCB: Complete Guide – Differences, Design Steps & Manufacturing

A 6 Layer PCB Board comprises three dielectric layers (insulating layers) and three conductive layers. The dielectric layers are usually made of fiberglass (a common material in PCB manufacturing) or other high-performance insulating materials, which provide electrical insulation between layers. Meanwhile, the conductive layers are typically composed of copper foil—with common thicknesses ranging from 0.5oz to 2oz—to enable efficient signal transmission and current conduction.

What is a 6 Layer PCB Board?

A 6 Layer PCB Board is a type of multilayer printed circuit board (MLB), similar to the 4 Layer PCB Board but with enhanced functionality. Compared to a standard 4 Layer PCB, it adds two extra conductive layers—making it ideal for devices that need more wiring space without increasing board size.

A typical 1.6mm 6 Layer PCB Board stackup follows this structure (from top to bottom): Top Copper Layer (signal layer) → Prepreg (insulating layer) → Inner Copper Layer (power layer) → Core (insulating layer) → Inner Copper Layer (ground layer) → Prepreg (insulating layer) → Bottom Copper Layer (signal layer). This stackup design significantly improves EMI (Electromagnetic Interference) performance by separating power, ground, and signal layers—reducing signal interference in complex electronic devices.

6 Layer PCB Stackup Applications

6 Layer PCB Stackup works for many industries, thanks to its more wiring space and stable performance.

1. Consumer Electronics

Used in high-end products: 5G phones, smartwatches, high-end microwaves.

Why choose: Makes devices smaller, supports fast data transfer.

2. Telecommunications

Fits equipment like 5G base stations, GPS, satellite devices.

Why choose: Reduces signal interference, keeps transmission stable.

3. Medical Devices

Used for X-ray machines, CT scanners, heart monitors.

Why choose: Meets medical standards, works reliably 24/7.

4. Industrial Control

Suitable for PLC panels, robot controls, industrial sensors.

Why choose: Withstands extreme temps (-40℃~125℃) and vibration.

Standard and Typical 6 Layer PCB Stackup

PCB stackup is made of copper layers, core boards and PP layers. Even 6-layer PCBs (with at least 3 conductive layers) can meet different needs—layers connect via holes.

1. What’s Standard 6 Layer PCB Stackup?

Refers to the fixed layered structure of 6-layer PCBs, usually including 3 copper (conductive) layers + 3 insulation (core/PP) layers, suitable for most common scenarios.

2. Benefits of PCB Stackup

Boosts function: Makes 6-layer PCBs transmit signals faster, supporting more powerful device functions.
Improves durability: Protects inner layers from external damage, lasting longer.
Reduces radiation: Minimizes equipment radiation (critical for high-frequency 6-layer PCBs); avoids extra EMI from bad impedance.
Cuts costs: Puts multiple circuits on one 6-layer PCB, lowering manufacturing fees.
Lessens crosstalk: Fixes poor impedance and signal interference issues.

The standard 6-layer PCB stackup works for most cases, but it’s not always the best fit. Below is a comparison of 3 other common stackup methods.

What is the Best 6 Layer PCB Stackup?

The “best” varies by needs. Below is a set of typical 6-layer PCB stackups for reference.

The structure is:

Signal Layer
Ground Plane
Signal Layer
Power Plane
Ground Plane
Signal Layer

This may not be your most satisfactory 6-layer PCB stack structure. The reason is that the signal layers in the circuit board have no shielding, and two of these signal layers are not adjacent to any ground plane. As signal integrity and performance grow increasingly important, this type of 6-layer PCB stack structure has been gradually abandoned.

In this 6-layer PCB stack-up, the number of signal layers is reduced to 3 to add an extra ground layer. The structure is as follows:

Top Signal Layer
GND1
Inner Signal Layer
Power Plane
GND2
Bottom Signal Layer

This 6-layer PCB stack-up places each signal layer close to a ground plane, which helps achieve optimal return path performance. Additionally, placing the power plane and ground planes adjacent to each other creates planar capacitance. However, this design has a drawback: you will indeed lose one signal layer for routing.

6 Layer PCB Design Tutorial and Design Software

A proper stackup has a huge impact on 6-layer PCB design. Luckily, current PCB design software is powerful enough to let you fully create the stackup you need.

How to choose the right PCB design software? We’ve listed 30 free options for you to download.

On the right is a video tutorial for 6-layer PCB design using OrCAD—hope it helps you.

Learn more about 4 Solutions to Reduce EMC in 6-Layer PCB Design.

Quick Turn 6 Layer PCB Board Manufacturing

Compared with double-sided and 4-layer PCBs, 6-layer PCBs feature more layers and offer better routing performance. However, their fabrication cost and production difficulty are also higher.

A 6-layer PCB is constructed by laminating layers onto a PCB core. After circuits are etched on the PCB core to form the third and fourth layers, the second and fifth layers are laminated under high temperature and pressure. Circuits are then etched on these two layers. The top and bottom layers are further laminated onto the 4-layer board, followed by circuit etching. Solder mask is applied to the top and bottom layers, and surface finish is processed on the PCB pads.

There are two types of PCB layer circuit etching methods:

Positive plane etching
Negative plane etching

With the continuous development of SMT (Surface Mount Technology) and the launch of new-generation SMD (Surface Mount Devices) such as QFP, QFN, CSP, and BGA (especially MBGA), electronic products have become more intelligent and miniaturized. This has driven major reforms and advancements in PCB industrial technology.

Accordingly, the progress of PCB manufacturing technology has also made 6-layer PCB production easier.

Materials for 6-layer PCB manufacturing

Printed circuit boards must be flame-resistant; they should only soften at a specific temperature rather than burn. This temperature is known as the glass transition temperature (Tg point), and this value is related to the dimensional stability of the PCB.

Standard PCB materials have a Tg value above 130°C, medium Tg materials are approximately 150°C, and high Tg materials are generally above 170°C.

Typically, PCBs with a Tg value ≥ 170°C are referred to as high Tg PCBs.

Multilayer circuit boards such as 6-layer PCBs generally adopt high Tg materials in production.

Normal Tg material (Tg 130–135°C) & High Tg material (above 170°C)

Normal Tg material (Tg 130–135°C)		High Tg material (above 170°C)
Manufacturer/Brand	Material	Manufacturer/Brand	Material
ShengYi	S1141	ShengYi	S1000-2
	S1155		S1141
NanYa	NP-140TL		S1170
KingBoard	KB-6160		S1165
		ISOLA	FR406/FR408
		ARLON	High Tg210 11N
		GETEK	High Tg180 ML200/RG200
		NELCO	High Tg175 N4000-6/N4000-11
			High Tg190 N4000-12
			High Tg210 N4000-13
		ITEQ	IT180

High-frequency material (RF boards)

Manufacturer/Brand	Material
Rogers	RO4000 Series
	RT5000/RT6000 Series
Taconic	TLX Series
Orcer	RF-35/RF-60 Series

Prepreg Material Information

Manufacturer/Brand	Material
KingBoard	KB-6050 Prepreg
	KB-606X

Prepreg Type

Prepreg Type	Thickness (mm)	Resin Content	Dielectric Constant
2116	0.12	55%	4.5
7630	0.2	55%	4.7
7628	0.185	43%	4.7
1080	0.075	65%	4.2

How to choose the best 6-Layer PCB manufacturer?

Choosing a capable 6-layer PCB manufacturer is critical to realizing your PCB design concept. A good multilayer PCB manufacturer must be efficient and reliable. Here are the factors to consider when selecting a 6-layer PCB manufacturer:

Rich experience: PCB manufacturing experience determines whether a manufacturer can successfully fulfill your 6-layer PCB order. Therefore, it is crucial to choose a reliable manufacturer with long-term experience in 6-layer PCB production.

Certification and licensing: Top 6-layer PCB manufacturers must hold valid qualifications, and their products should comply with IPC standards for the PCB industry.

Quick Turnaround Time: Turnaround time refers to the period required to complete an order. You will want your manufacturer to deliver high-quality boards within an agreed lead time.

Technical support: Strong PCB manufacturers can assist with your PCB design and provide technical support including DFM, DFT, and DFA.

Customer Service: You will want your PCB manufacturer to understand and satisfy your requirements. You should choose a manufacturer that responds promptly to customer needs and complaints.

JHY is a reliable and trustworthy PCB manufacturer and supplier based in China. Founded in 2011, we specialize in manufacturing single-sided, double-sided, and multilayer rigid PCBs, flexible PCBs, rigid-flex PCBs, HDI PCBs, as well as prototype and high-volume PCB production. We can fabricate and assemble PCBs from 1 to 64 layers.

6 Layer PCB Prototype Price

As a professional multilayer PCB manufacturer in China, we offer competitive and reasonable pricing for clients. We provide low-cost, high-quality 6-layer PCB prototype manufacturing services with fast turnaround times.

6-layer PCB prototype fabrication helps you quickly verify your stackup and design, detect errors and defects in a timely manner, and reduce unnecessary losses before mass production.

Standard delivery for 6-layer PCB prototypes takes 5-7 days, while express prototyping is available within 72 hours.

You can get a quick, free quote for 6-layer PCBs easily: just send your Gerber files, order quantity and other relevant details via email to.

6 Layer PCB FAQs

Number of PCB layers: A 6-layer PCB has two extra layers compared to a 4-layer PCB, making its structure more complex.

Stackup structure: A 6-layer PCB stackup features two additional signal layers between its internal planes, which also raises its procurement cost.

Impedance characteristics: Compared to a 4-layer PCB stackup, a 6-layer PCB stackup offers lower impedance.

A 6-layer PCB stackup provides more routing space, so it requires fewer wire connections per layer than a 4-layer PCB stackup.

Overall, a 6-layer PCB stackup delivers higher working efficiency and better overall performance than a 4-layer PCB stackup.

The price of a 6-layer PCB is affected by multiple key factors, summarized as follows:

Component quantity and quality: Assembly costs rise with the number of components; higher-quality components also add to the total cost.

Board size: The larger the 6-layer PCB dimensions, the higher the manufacturing cost.

Production process: 6-layer PCBs with special processes such as buried and blind vias will cost more.

Board material: High Tg materials (e.g., High Tg170, High Tg180) are more expensive than standard FR4 materials.

Step 1: Schematic Diagram Editing After completing the schematic diagram, perform a thorough error check, and verify component packages via the package manager.

Step 2: Create a New PCB File & Set Layer Structure Once the new PCB file is created, import the schematic netlist into the PCB file to prepare for 6-layer PCB manufacturing.

Step 3: Component Layout The core layout principle for 6-layer PCBs is proper functional partitioning. Analog and digital devices should be physically separated to reduce interference, as digital signals generate significant interference and require strong anti-interference measures.

Step 4: Ground Plane Creation 6-layer PCBs are designed with two ground layers: AGND (Analog Ground) and DGND (Digital Ground). These two layers are typically separated and placed on the second and fourth layers respectively, simplifying ground network operations. Ground network pins of top and bottom components are routed out and connected to the corresponding ground network via vias; use as few pads as possible during connection, as pads introduce capacitance effects and increase interference.

Step 5: Power Plane Creation Multilayer PCBs usually support multiple operating voltages, so the power layer needs to be divided into separate voltage zones.

Step 6: Routing Complete the power and ground plane designs first, then proceed with signal line routing. For critical high-speed signal lines, route them on the inner signal layers for optimal performance.

Step 7: DRC Inspection This is a critical step in 6-layer PCB manufacturing. A full DRC (Design Rule Check) must be conducted after the PCB layout is finished.

PCB Stack-up refers to the sequential layer structure of a multilayer circuit board. It specifies critical parameters including material thickness and copper weight required for PCB manufacturing, and is also known as a build-up. Additionally, a stack-up provides detailed trace width specifications for controlled impedance traces, such as 50 ohms single-ended and 100 ohms differential traces.

A PCB stack-up is mainly composed of metal foil, prepreg, and copper-clad laminate (core).

Metal foil: Copper foil is the most widely used metal foil in PCB structures.
Prepreg: A type of fiberglass cloth impregnated with epoxy resin, with the resin remaining in a semi-cured state.
Copper-clad laminate (CCL): Formed by bonding one or more prepreg layers with top and bottom copper foils; also referred to as the core board.

Power and Ground Layers: The power plane is a dedicated copper layer connected to the power supply, usually marked as VCC in PCB design, whose main function is to provide a stable voltage supply to the circuit board. In multilayer PCBs, components draw power through vias connected to the power plane. Similarly, the ground plane is a flat copper layer connected to the common ground point of the PCB.

PCB lamination is the process of bonding prepreg and copper foils to the inner core layers of a PCB by applying high temperature and pressure. The specific temperature and pressure parameters are specified in the datasheet of the selected PCB materials.

PCB thickness is mainly determined by copper thickness, base material, number of layers, operating environment and other factors. The standard thickness of conventional PCBs is approximately 62 mils (1.57 mm). With the development of complex applications requiring heavier copper and more layers, modern PCBs are becoming thicker. To meet customer demands, manufacturers now produce two new standard thicknesses: 93 mils (2.36 mm, 150% of the original standard) and 125 mils (3.17 mm, 200% of the original standard).

With advancements in electronic technology, electronic devices are becoming smaller and thinner, while requiring more components and routing, leading to more complex circuit designs.

Single-layer PCBs can no longer meet these increasingly complex demands, so increasing the number of board layers has become the standard solution.

The main advantages of multilayer circuit boards include:

Multilayer PCBs simplify electronic equipment design and further reduce the overall weight of finished devices.

Adapt to the complex circuit design requirements of modern electronic devices; for example, 6-layer PCBs offer far greater design advantages than double-sided PCBs.

Multilayer PCBs are thicker, making them more durable than single-layer PCBs.

Multilayer PCB manufacturing involves higher precision, resulting in better overall quality than single and double-sided PCBs.

6 Layer PCB Board – Custom Stackup, Thickness & Competitive Price

What is a 6 Layer PCB Board?