Your Excellent Coil PCB Manufacturer in China

Your Number 1 Coil PCB Supplier

PCBMay can offer a wide range of PCB and electronic components nationwide. We have different types of PCBs to meet various electronic fields. Whether you need a stable coil PCB or any PCB, you can choose PCBMay as your prominent supplier.

PCBMay coil PCB comes in a variety of features, sizes, and designs. The coil PCB has unique characteristics which are perfect in various commercial and industrial applications. We also customizing PCB products depending on customers’ demand and requests. You can enjoy the benefits and advantages while using our Coil PCB.

PCBMay coil PCB can last for several years. When you need a long-lasting PCB, coil PCB is one of the great choices. The PCB coil is composed of durable and superior materials to ensure the best condition and performance.

Aside from that, we have different types of coil PCB such as wireless coil PCB, receiver coil PCB, standard coil PCB, coil desktop PCB, single-coil charger PCB, PCB with the dual coil, and so on.

We are very confident to offer our coil PCB in different countries. If you live abroad and want to have our products for your business, no worries since we can export a PCB coil to fulfill your needs. We can provide a low-cost coil PCB without compromising the quality.

We obtain a Rohs and ISO certification because we always supply a qualified coil PCB. We always keep maintaining the best name in this industry to guarantee your trust is worth it. We will never hesitate to provide your coil PCB required.

As an expert manufacturer, we are familiar with every PCB and electronic component. We can ensure you that you can always get the right and exact coil PCB. 

PCBMay will always impress and surpass your expectations. We are glad to work with you and help your business to grow.

For more information with regards to our PCB products, feel free to contact us!

Coil PCB: The Ultimate FAQ Guide

People suffered a lot from power transferring systems earlier. Coil PCB has brought out a revolutionary change in this sector. It makes wireless charging easier and boosts the efficiency of coil-based devices.

PCBMay comes up with the best manufacturing service for this PCB at present time. This complete FAQ guide will help you to know the pros and cons of coil PCB. We hope you can find the solution to your PCB application. Let’s start.

What Is A Coil PCB?

Coil PCB is the backbone of wireless power transmission technology. It is a combination of some entwined isolating and conductor layers. Here, the conductor layer consists of different segments and a trace that regulates the coil shape of this PCB.

Coil PCB

These discrete portions ensure the smooth current flow through an electrical connection between the PCB layers. It produces magnetic flux by receiving an alternating current.

Coil PCB has widely used in MEMS (Micro-Electro-Mechanical System) devices due to its immense benefits. The PCB trace is spiral-shaped in this case. You can apply this in a multilayer PCB design by using vias properly.

What Are Coil PCB Materials?

Coil PCB consists of some highly useful materials. The presence of these materials promotes its efficiency in electronic devices where induction technology is applied. The principal materials of this PCB are FR4, epoxy resin, prepreg, etc.

Coil PCB FR4 Materials

The glass transition temperature of this PCB is high. FR4 materials are responsible for this property. These materials act to control the thermal properties of the PCB coil. That’s why you can use this in a wide range of working temperatures.

Besides, Prepreg maintains impedance stability by using the amalgamation of fiberglass and resin materials. This PCB contains a low amount of halogens. But this amount never exceeds the threshold value of being halogen-free.

That means the coil PCB materials turn it into an ecologically effective PCB solution.

What Are The Different Types Of Coil PCB?

Coil PCB is highly applicable in various industries in different forms. The most significant types of coil PCB include-

• Wireless coil charger PCB
• Single-coil charger PCB
• Coil desktop PCB
• Receiver coil PCB
• Coil transmitter module PCB
• Standard coil wireless PCB
• Coil power bank PCB

Dual Coil Wireless PCB

What Are The Uses Of Coil PCB?

Coil PCB is very common in electromagnetic system-based applications. Its remarkable uses are-

• Electric motors
• Sensors
• Inductors
• Transformers
• Generators
• Military machinery
• Navigation systems
• Communication devices
• Radar
• Wireless charging system
• Biomedical equipment

Widely Used Coil PCB

What Are The Benefits Of Coil PCB?

Coil PCB adds numerous positive effects to versatile PCB applications. Its noteworthy benefits are explained here.

Simple Manufacturing Process

Its manufacturing technique is very straightforward. You can easily design the PCB layout and develop it by using design software. Its wireless mechanism reduces the hassle during manufacturing.

Besides, its design topology enables you to place the PCB components efficiently. Thus, this PCB is highly compatible with different industries.

Competitive Expense

Coil PCB offers tremendous performance at a competitive cost. Its manufacturing process is comparatively costly. But this is worthwhile for having such an impressive large-scale PCB assembly.

High Functionality

This High Tg PCB deals with various temperatures. Again, it renders effective impedance stability that takes care of skin effects, parasitic issues, etc. Besides, coil PCB provides low noise during signal transmission.

It resists moisture effectively in dense conditions. You can also utilize this in multilayer PCB assembly. All of these factors make it a supremely functional PCB in recent times.

Robustness

Its dielectric materials are proven for ensuring dielectric strength. It develops the durability of the entire project. These useful materials impede the thermal and mechanical forces. Thus, the longevity of your coil-driven device is also increased.

Effective Wireless Coil PCB

Thermal Management

Coil PCB design techniques support the use of through-hole vias and thermal vias. These vias are very functional to distribute the heat stored at the bottom of PCB components. That means your circuit becomes less vulnerable to overheating.

It is also supportive to maintain the thermal features of the dielectric materials. This notable thermal management plays a vital role in its versatile applications.

Eco-friendly

It is a halogen-free PCB. It never causes any fatal issues to the environment. Its effective surface finish technology helps to be compatible with lead-free processes.

How Does The Temperature Change Affect The Coil PCB?

The temperature change affects the performance of the coil PCB in many ways. Frequent change in temperature hampers the thermal management of this PCB. It is not useful for consistent thermal properties.

This regulates the impedance control of the PCB coil. It results in less durability of your PCB applications. Besides, the PCB can’t maintain a high glass transition temperature due to the effect of temperature change.

Coil PCB Temperature Control

It also lessens the quality of the dielectric materials used in the coil PCB. That’s why you need to consider the temperature change during the design.

What Is The Effect Of The Dielectric Constant In Coil PCB?

The dielectric constant has numerous effects in the coil PCB applications. This property controls the dielectric strength and impedance stability. The dielectric strength maintains the insulation properties of the PCB materials.

That means it affects the robustness of electric circuits. High robustness promotes its use in versatile applications. Again, a low dielectric constant leads to a low dissipation factor of PCB. So, the signal transmission is related to the dielectric constant.

Low DK Coil PCB

Its value should be lower. Its wide range makes a PCB compatible with a multilayer PCB stack-up. The coil PCB consists of useful dielectric materials like FR4, epoxy resin, etc. These materials ensure an effective dielectric constant that improves the device’s performance.

What Is The Coupling Factor In A Coil PCB?

The coupling factor is a major issue that influences the performance of coil PCB. It refers to the magnetic flux which is interchanged between transmitting and receiving coil.

Here, M= mutual inductance between two coils

L/p= Inductance of transmitting/primary coil, L/s= Inductance of receiving/secondary coil.

Coupling Factor VS Distance Between Coupled Coils

Its value varies from 0 to 1. The value of the coupling factor is 0 means both coils are not related to each other. Again, its maximum value of 1 indicates the total exchange of magnetic flux from the primary to the secondary coil.

This factor depends on the gap between coils, shape, angle, etc. Coil PCB having a higher coupling factor promotes the performance of coil-based devices.

What Is The Best Trace Width Of Coil PCB?

The trace width is a geometrical parameter of the coil PCB design. It affects the capacity of the current load which leads to the power capability of the PCB coil. Its suitable value depends on the PCB layout and the application.

PCB Trace Width

You can calculate the required trace width via the following formula.

Trace width, w= A/Tx1.378. Here, T and A indicate the copper thickness and cross-sectional area of this PCB. Its most used range is 0.051mm to 1.016mm. There are some limitations that occur due to the trace width above 1.2 mm.

What Are The Output Parameters In Designing A Coil PCB?

You need to consider the output parameters while designing a coil PCB. These parameters are required to be set after analyzing the geometrical parameters like trace width, copper thickness, minimum spacing, etc.

Here, a list of the most common output parameters is given for your convenience.

• Q factor
• Coil fill ratio
• Total circular resistance
• DC resistance
• AC resistance
• Sensor frequency
• Self-resonant frequency
• Skin depth
• Resonance impedance
• Power dissipation
• Current rating
• Coefficient of self-inductance
• Mean diameter of the coil
• Coil length for a unit layer

A well-designed coil PCB ensures the top-class performance of electric circuits. That’s why you have to design it through a reliable manufacturer.

How To Calculate The Link Efficiency In Coil PCB?

In coil PCB, the link efficiency indicates the power exchanged between the primary and the secondary coils. It is a measurement that determines the level of performance in the PCB coil. You can calculate the link efficiency by applying this equation:

Here L,w, ESR indicates the coil’s inductance, angular frequency, and the effective series resistance of the PCB coil respectively.

Coil PCB High Link Efficiency

The range of the link efficiency is 0-1. Its higher value refers to the optimization of the coil PCB.

What Is The Q Factor In A Coil PCB?

Q factor means the quality factor in coil PCB. It is the ratio of frequency-based inductance and effective series resistance.  You can measure the power loss of your PCB coil through this value.

Q Factor VS Coil Radius

It is reciprocal of the loss factor. The q factor depends on the frequency of the signal. Its higher value indicates the better quality of electronic devices. You can use the PCB coil having a high q factor in high-frequency applications.

What Is The Wireless Charging Coil PCB?

The wireless charging coil PCB is a cordless technology to transfer power to the other section of electric circuits. It utilizes electromagnetic induction to transmit the power. This PCB is very effective for charging devices.

Its working principle is very simple. This PCB consists of a transmitter coil that receives alternating current from the voltage source. Then it produces a magnetic field in the primary coil.

Wireless Charging Coil PCB

If you connect a device to this PCB, it transmits the magnetic flux to the receiver coil of that device. This magnetic flux is used for current induction in the secondary coil. The device can get charged through this induced current. That means you don’t require wires.

It lessens the hassle of using wires in charging and signal transmission. It is prominently used in self-charging laptops, smartphones, etc. You can easily charge your devices by keeping them within the range of the charging station without any use of wires.

Besides, you can apply this technology to charge your electric vehicles. In this case, The PCB coil needs to be stacked parallelly. Proper use of through-hole vias and turns ratio increases the Q factor of the wireless charger coil PCB.

How To Design Wireless Charging Coil PCB?

A proper design of the wireless charging coil PCB improves the performance of WPT (Wireless Power Transfer) projects. You need to follow some design techniques to ensure an effective link efficiency and Q factor of your devices. Such as:

• Use ferrite close to the transmitter coil
• Choose the ferrite materials having a higher relative permeability.
• Use the copper having a higher thickness ( around 70 micrometers) and low spacing. It promotes link efficiency.
• Trace width should be less than 1.2 mm.
• The internal radius needs to be more than 5mm.
• Use a higher number of turns to increase efficiency.
• Apply the plated through-hole vias for better thermal management.

Multi-Coil Wireless Charging PCB

Can A Coil PCB Be Customized?

Yes. You can experience a customized coil PCB for a specific industry. It promotes the stability and performance of electronic devices to a great extent. You have an immense opportunity to add some additional features like dual coil, wireless charger, single-coil charger adaptability, and so on.

Customized Coil PCB

That means you can customize your electric circuit according to your design. We are offering reliable customization service over a long period. Inquire us to enjoy the stable performance of a customized coil PCB

Do You Need To Use Thermal Vias For Coil PCB?

Coil PCB delivers tremendous performance due to its smart thermal management. Proper use of thermal vias makes it possible. These vias create a smooth passage for heat distribution in PCB layers.

Usually, FR4 materials provide high thermal resistance. So, heat has got trapped near the components which result in hampering the solder joints. Thermal vias act to transfer the excessive heat to the deep level of the PCB substrate.

PCB Thermal Vias

It saves the circuit from being damaged. That’s why you need to use thermal vias intelligently. You should place them close to the PCB components for proper heat conduction.

Besides, a solder mask needs to be applied for avoiding solder wicking in the case of thermal vias.

Which Software Is Used In Coil PCB Design?

Software plays a vital role in the coil PCB design. You can improve your PCB layout design by using the PCB design software. You need to consider the interface and features while choosing the perfect software for this PCB.

Make Coil PCB Using KiCAD

KiCAD EDA is the widely used design software of the PCB coil. Besides, you can think about other software. Such as:

• Fusion 360
• SolidWorks PCB
• Autodesk EAGLE
• Dip Trace

You can set different parameters like the number of turns, copper thickness, trace width, radius, minimum spacing, etc in the software. Don’t forget to read the operation manual before conducting the software.

How To Manufacture A Coil PCB?

The use of coil PCB is rapidly increasing day by day. So, you have to ensure its faultless manufacture. The basic steps of PCB coil manufacturing are explained below for you. Let’s have a look.

PCB Design

At the beginning of the manufacturing process, you need to design the PCB. You must consider the factors that affect the PCB design. Like the number of turns, trace width, inner radius of the coil, vias, etc. You should follow the proper guideline and choose the right dimensions during design.

Software Operation

After completing the design of the PCB layout, you have to check this through the design software. It assures the optimum performance of your PCB devices. You have to set the ideal output parameters properly. This helps you to verify your design.

Component Placement

Now, it is time to place the PCB components. You just need to ensure the maximum current flow between the PCB layers. That’s why you should try to set the component placement concerning the manufacturer’s recommendation.

Fabrication

This is a crucial step of the entire manufacturing process. This step combines the plating and etching of the PCB. You need to cover the vital portion of the coil PCB via the solder mask while etching.

Sometimes, the solder wicking occurs here during the fabrication. So, you should try to avoid this issue.

Testing

You can apply some trustworthy testing methods to verify your PCB coil. Usually, automated optical inspection, flying probe test, function test, etc are very popular for PCB testing. That’s how you can ensure trusted manufacture of the coil PCB.

What Are The Limitations Of Coil PCB?

Coil PCB has a few limitations. These negative sides hamper the device’s performance in some aspects. The most significant drawbacks of this PCB are-

• It sometimes suffers from the nonuniform induced current distribution. This issue causes damage to the device.
• This PCB is vulnerable to parasitic capacitance. It happens due to excessive receiving of magnetic flux.
• Its cost is relatively higher than the traditional wire coils.

Perfect Coil PCB

You can easily overcome these limitations through a reliable assembly of the coil PCB. We have been manufacturing this PCB for more than 15 years. Inquire us for having a trouble-free coil PCB.

How To Test A Coil PCB Performance?

You can achieve a clear idea about the performance of a coil PCB easily. You just need to conduct a trusted inspection of this PCB in this case. The most reliable inspection methods for performance verification are explained here.

Automated Optical Inspection

It is a contact-free inspection process. The AOI machine is integrated with a high-power camera. This camera scans the coil PCB and captures its images. This test identifies the quality defects of a PCB by comparing it with a perfect one.

This automated inspection also detects catastrophic faults like the wrong placement of the components visually.  It should be applied after the reflow process to check the solder connections, fillet size, etc. The AOI test is effective and time-saving. But It costs a lot.

Flying Probe Test

This test is effective for high-density PCB projects. Here, you can see different probes are headed towards the different axis. The inspector makes a contact between these probes and the coil PCB.

Then the PCB receives an electric signal and responds to it. You can detect faulty connections, improper soldering, faults in current and power rating, etc through this test.

PCB Flying Probe Test

The best thing about the flying probe test is you don’t require extra fixtures to switch The PCB. Normally, a solenoid is applied to get the Z-axis direction of the probes. This inspection kills time in a high-volume PCB application. Watch this video:

How Can You Choose The Right Coil PCB Manufacturer?

The right coil PCB manufacturer should have the following properties.

• Ability to provide one-stop service for PCB problems.
• Worthwhile manufacturing experience
• Professional technical support team
• IPC Class 2 or Class 3 standard coil PCB materials
• ISO-certified factory
• 24/7 customer care support

We are the leading coil PCB assembly supplier and manufacturer for a long period. We provide skilled technicians for fast prototype PCB service. Contact us.

Conclusion

Coil PCB solves the problems of traditional coils used in electronic devices. You can experience the superlative performance of PCB applications through this effective PCB type.

PCBMay delivers a one-stop PCB assembly service for you. We have explained all the issues in detail and in simple words. We hope this FAQ guide will enable you to find the best manufacturing service for this PCB. Contact us for further information.