4-Layer PCB Manufacture in China- HXDcircuit

PCB Certifications

HXD 4-Layer PCBs

4Layer Rigid-flex PCB

Stable 4-Layer Rigid-Flex Design (FR4 + PI) Combines flexibility and rigidity to support compact layouts and dynamic bending in industrial control applications.

4Layer Rogers4350+FR4 with Hybrid Laminating PCB

Rogers 4350 for RF layers + FR4 for structural layers, delivering high-frequency performance with lower material cost

4Layer with Rogers+FR4 Hybrid Board+Copper Coin Buried

Hybrid Material: FR4 Tg170 + Rogers 4350,4-Layer Rigid Structure for Broadcasting Applications,High-Precision PCB Capability

4layer with Half hole

Edge-plated half holes enable module plug-in, board-to-board connection, and compact mechanical integration.

Example1: 4-Layer PCB Stackup and Product Images

4-layer High Frequency Hybrid Rigid PCB Stackup

Finished Board Thickness:	1.0+/-10%mm
Application:	Communication
Layer:	4L
Material:	Ro4350B(Tg>280)+IT180A
Surface Finish:	ENIG
Type:	High Frequency Hybrid Rigid PCB

4-layer-HF-HYBIRD-PCB

Example2: 4-Layer PCB Stackup and Product Images

4-Layer PCB Stackup for High-Frequency Hybrid PCB + HDI

Finished Board Thickness:	1.2+/-10%mm
Application:	Advanced Radar Systems
Layer:	4L
Material:	Ro4350B+S1000-2
Surface Finish:	ENIG
Special Feature:	Buried Copper Coin, Resin plugging

Example3: 4-Layer PCB Stackup and Product Images

Finished Board Thickness:	1.0+/-10%mm
Type:	Rigid-flex
Layer:	4L
Material:	AP8535R ,TG170
Surface Finish:	ENIG
Special Feature:	Buried Copper Coin, Resin plugging

4Layer Rigid-flex PCB case3

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Key Benefits of 4-Layer PCB

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Superior Signal Integrity

The dedicated ground and power planes in a 4-layer PCB significantly reduce signal noise and crosstalk, ensuring cleaner, more reliable signal transmission compared to single or double-sided boards.

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Enhanced EMI Shielding

With inner ground planes acting as a shield, 4-layer PCBs effectively suppress electromagnetic interference (EMI), making them ideal for high-frequency and high-speed applications.

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Better Power Distribution

A dedicated power plane ensures stable voltage delivery across the entire board, reducing power fluctuations and improving overall circuit performance.

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A Cost-Effective Choice for Complex Circuits

A 4-layer PCB is much more powerful than a 2-layer board, but its manufacturing cost is significantly lower than 6 or 8-layer boards. This makes it the best choice for medium-complexity circuits.

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Thermal Management

The additional copper layers help dissipate heat more efficiently, extending component lifespan and improving reliability in high-power applications.

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Higher Reliability

4-layer PCBs meet IPC Class II and Class III standards, making them suitable for demanding industries such as automotive, aerospace, medical, and industrial equipment.

Why Choose HXD for Your 4-Layer PCBs?

Stackup : We support standard and custom 4-layer stackup, ensuring optimal signal integrity and EMI shielding for your specific design requirements.
Full Range of Thickness: From 0.4mm to 3.2mm ,we manufacture any 4-layer PCB thickness to your exact specifications — no MOQ.
Diverse Substrates: We offer Standard FR-4,High-Tg,Rogers,Ceramic, and Polyimide to meet all your thermal management needs.
Advanced Technology： Supports blind and buried vias, controlled impedance, via-in-pad, and back-drill techniques.
Surface Finishes : HASL Lead-Free, OSP, Immersion Silver, Immersion Tin, and Hard Gold.

what is 4-layer PCB?

A 4-layer PCB is made of four conductive copper layers separated by insulating dielectric layers. This structure is widely used in many electronic products.

The four copper layers are :

Top and Bottom Layers: Used for component placement and signal routing.
Two Internal Layers: Typically used as the Power Plane (VCC) and Ground Plane (GND).

Compared to a 2-layer PCB, a 4-layer design offers significant advantages in signal integrity, EMI control, and routing density.

4-layer PCB Stackup Overview

There is no single 4-layer stackup that fits every product. Designers should choose the most suitable stackup based on specific needs, such as electrical performance, EMI control, power distribution, and routing requirements， the following stack-up are commonly used.

Signal – GND – PWR – Signal

This is the most widely used stackup structure. It offers a perfect balance between circuit complexity, manufacturing cost, and electrical performance. It is ideal for the following applications:

IoT Devices & Sensors: Smart home and connected products.
Industrial Control & Automotive Electronics: Reliable performance for tough environments.
Consumer Electronics: Smartphones, tablets, and home appliances.

GND – Signal – Signal – GND

This structure effectively blocks external interference from entering the circuit and prevents internal signals from radiating outwards. It is commonly used for high-speed digital designs that are extremely sensitive to noise, though it also brings some design challenges.

Signal – GND – GND – PWR

This is a power-focused structure. If your PCB is mainly designed to drive motors or handle high-power conversion with simple control logic, this structure is perfect. It provides a more stable power supply and a cleaner grounding environment than standard stack-up.

The following are HXD’s commonly used 4-layer PCB stackups,You can also explore our Flex PCB Stackup and rigid-flex PCB stackup options.

FAQ

What factors affect the cost of 4-layer PCB manufacturing?

The cost of 4-layer PCB manufacturing depends on several key factors:

Board Size: Larger boards require more materials, which leads to higher costs.
Surface Finish: For example, ENIG (Gold) is typically more expensive than HASL (Solder).
Design Complexity: Features like Blind and Buried Vias or Controlled Impedance requirements will increase manufacturing difficulty and cost.
Copper Thickness: Using heavy copper (such as 2oz) will add to the total price.

What is a “Standard Stackup” for a 4-Layer PCB?

The most common stackup is Signal – GND – PWR – Signal.

Placing the power and ground layers in the middle has two key benefits:

EMI shielding: The inner plane layers act as shields and reduce electromagnetic radiation.
Lower impedance: A smaller distance between the power and ground planes lowers plane impedance and improves circuit stability.

What are the standard thickness and materials for a 4-layer PCB?

The most common thickness for a 4-layer PCB is 1.6 mm.Other options are also available, such as 0.8 mm for mobile devices, and 1.2 mm or 2.0 mm for special needs.

For materials, FR-4 is the standard choice.For high-power designs or harsh environments, High-Tg materials, Rogers, or ceramic substrates can also be used.

4-Layer PCB Manufacturing

We deliver high-quality 4-layer PCBs with competitive pricing, fast turnaround, and no MOQ. From rapid prototyping to mass production, we ensure precision manufacturing and strict quality control at every stage.