Your Elite Waterproof PCB Manufacturer in China

Your Professional Waterproof PCB Manufacturer 

Seeking the highest-quality waterproof PCB is not a massive difficulty if you choose PCBMay as your most significant provider. PCBMay is your no.1 choice for your PCB prototyping components and assembly, specifically the waterproof PCB. It has the highest technology elements and a waterproof coating membrane that makes it more ideal. 

Unlike other PCB, waterproof PCBs are a versatile feature of any PCB component. All electronic elements will remain functional and operated even with constant flowing or stationary of water and any liquid substance on the board surface.

Moreover, waterproof PCB specializes in high-transition power, high-efficient function elements. It is also sustainable and stable in operations. We have tons of classifications of waterproof PCB that perfectly suit all your PCB applications and installations.

PCBMay has a solid and stable workforce that designates research, design, planning, layout, and manufacturing of waterproof PCB. PCBMay exceeds in surpassing all the multifarious quality standards of all the customers.

Besides, we also comply with and follow all the international product certification systems, including the ISO9001:2008, RoHS, REACH, ISO9001:2015, UL (E477880), and ISO14001:2015. In PCBMay, all sorts of PCB features like the multilayer PCB, aluminum PCB, metal core PCB, flexible PCB, HDI PCB, flex-rigid PCB, heavy copper PCB, roger PCB, etc.

We involve in distributing all types of PCBs to all leading market outlets, local and international. Experience an endless satisfaction of waterproof PCB here at PCBMay. We can cater to all your ideal designs, layout, and features for your waterproof PCB.

PCBMay offers both OEM and ODM services. And also, we accept a tremendous amount of your waterproof PCB orders. We have our excellent delivery team who manages to quickly deliver your orders anytime, anywhere. 

 You can reach PCBMay anytime! We have our servicing and communication team who can entertain all your concerns, suggestions, complaints, and inquiries about the product.  

For the newest update of waterproof PCB, don’t forget to check our official website or reach us on our hotline!

Waterproof PCB: The Ultimate FAQ Guide

Do you want to protect electric circuits from water-related hassles?

Waterproof PCB brings a solid solution in this case. It obstructs the entry of minimum water. So this PCB remains worthwhile for a long period. Its outstanding efficiency in protecting PCB makes it the best choice for electronic applications.

PCBMay is the most elite manufacturer of waterproof PCB. We have intended to provide you with its details in this FAQ guide. We hope it will benefit you in experiencing the excellence of electric circuits.

Let’s start.

What Is A Waterproof PCB?

A waterproof PCB is a unique circuit board that can obstruct the constant flow of water. Its components remain operative despite getting connected to water or any other liquids.

It transmits high-power signals with great efficiency. This PCB is composed of effective materials. Its versatile categories and advantages make it suitable for numerous PCB installations.

Waterproof PCB

It upgrades the activities of electronic devices in wet weather. Its flexible features increase its applications greatly. Most noteworthy, this multi-skilled PCB boosts the durability and functionality of devices.

What Are Waterproof PCB Materials?

Waterproof PCB materials have a huge contribution in applying waterproofing techniques. These materials support the encapsulation of resin materials and coatings.

The basic PCB materials are Parylene C, epoxy resin, polyamide, CEM1, CEM3, FR-4, etc. This PCB controls the temperature effects, impedance control, data transmission, etc.

Waterproof PCB Materials

Acrylic, silicon, etc are coating materials used in the conformal coating. Waterproof PCB can be viable for multilayer design due to these PCB materials.

What Are The Different Types Of Waterproof PCB?

Waterproof PCB has countless classifications. The most used types are-

• Waterproof wireless speaker PCB
• Xbox waterproof PCB
• Waterproof electric toothbrush PCB
• Amplifier PCB
• Waterproof Radio PCB
• Multilayer PCB
• Backplane PCB
• Waterproof Chiller PCB

Radio Waterproof PCB

What Are The Applications Of Waterproof PCB?

The applications of waterproof PCB are rising with a positive slope. Impressive features with high functionality are the real factors behind it. Its vital applications include-

• Control systems of navy
• Submarines
• Navigation devices
• Radar
• Wireless communication system
• Industrial pieces of machinery
• Radio-frequency devices
• Automotive devices
• Relays
• Medical types of equipment
• Robotics
• Smartwatch applications
• Keyboard
• Wireless speaker
• Cleaning devices

Widely Used Waterproof PCB

Besides, waterproof PCB has a mandatory presence in prototype PCB projects.

What Are The Benefits Of Waterproof PCB?

The most noteworthy benefits of waterproof PCB are described here for you. Let’s have a look.

Functionality

PCB keeps the device functional because of its waterproof feature. It makes the components active in humid weather efficiently. Its effective and safeguarding layers avoid damage in high-power data transmission.

Longevity

It can operate during the consistent flow of water. That means your electronic gadgets don’t get affected by water due to waterproofing measures and PCB enclosure. So, a device along with the circuit remains productive without declining efficiency.

Highly Functional Waterproof PCB

Cost-effective

Some coating techniques are very costly. But, you get a tremendous gadget in exchange for a competitive cost. So. it will be cost-effective in the long run.

Durability

Waterproof PCB makes the circuit extremely durable. It can tolerate excessive water flow, corrosion, dust, etc. This property ultimately develops the performance of electromagnetic appliances.

What Is The IP Rating Of A Waterproof PCB?

The IP rating of a waterproof PCB is IP68 and IP69.

IP is the short form of ingress protection. This rating determines the permittivity of solid and liquid substances in PCB. Here, the first digit indicates the protection level against solids like dust. Its highest value is 6. It means A PCB application is completely air-tight.

Waterproof PCB IP 68 Rating

The second digit specifies the protection level against liquids. Such as moisture, water, etc. Its range is 0 to 9. If you notice 8 in the 2nd place of IP rating, you can be sure that the PCB can resist extreme immersion.

9 indicates the resistance against high-speed jet spray. Usually, waterproof PCB offers maximum protection against dust and water. That means IP67, IP68, and IP69 are common for this PCB.

We have been manufacturing waterproof PCB for more than 15 years. Contact us for experiencing this PCB having IP68 and IP69 ratings.

What Are The Processes Used In Waterproof PCB To Resist Water?

Water damages the circuit board in many aspects. But, there is always a possibility of entering the water to the PCB. That’s why you have to apply some effective processes to make your PCB waterproof.

You can choose the PCB materials which can resist water effectively. Like Parylene materials are highly worthwhile for waterproof PCB. This process is applicable in naval control devices.

Waterproof PCB Process

Again, using an extra layer on the PCB surface is another waterproofing technique. You can apply a dielectric layer through the conformal coating. Resins are also used as a protective layer in this PCB.

You have to paint the PCB carefully. Usually, spray systems and dispensing are widely-used ways in this case. Dipping the entire PCB in the coating solution is also used sometimes.

Connectors are a good medium for penetrating water into the PCB. So, you can cover these components by using water-resistant materials.  Thus, A PCB becomes waterproof and increases the shelf life of devices.

What Is The Epoxy Method In A Waterproof PCB?

The epoxy method is an effective way to waterproof PCB. Here, we are going to explain this method for your benefit.

Material Selection

First, you have to select the necessary parts for the epoxy method. A list is prepared for you here.

• It should be ensured that epoxy materials are free from any metal additives. This metallic addition produces excessive heat.
• Blu tack
• Silicon pad. It is used in the heat conduction of the hot components.
• Heat sink.
• Gold Connectors
• ESD (Electrostatic discharge) strap
• Balloon

Exposing PCB

Next, you need a PCB. You can use a new circuit board or disassemble it from an electronic device. Use glue and clips to hold the PCB properly.

Epoxy Method In Waterproof PCB

Using Gold Connectors

Gold is a less reactive metal compared to copper. That’s why you have to apply the gold connectors instead of older pins or connectors. It also helps to protect the PCB from corrosion.

Covering And Using Glue

Now, cover the components where you don’t require using glue. You can use balloons for the SMDs. Apply heat sink for transistors, power amplifiers, etc. These components suffer from overheating.

Mixing Of Epoxy

At this stage, you need to mix a sufficient amount of epoxy around the components. Just avoid the epoxy which is electrically conductive. Then, dry the PCB before using silicon coating on the connectors or buttons.

Proper use of silicon keeps the epoxy intact and obstructs the entrance of water. This is all about the epoxy method in your waterproof PCB.

How To Identify The Conformal Coating In Waterproof PCB?

Conformal coating is a shielding technology used in waterproof PCB. You need to identify the type to ensure the elite performance of electronic gadgets. 5 types of conformal coatings are found which are very worthwhile.

• Epoxy Resin (ER)
• Polyurethane Resin (PR)
• Silicon Resin (SR)
• Acrylic Resin (AR)
• Parylene Resin (XY)

You can identify these coatings by applying some measures. Such as:

Label Checking

This is the easiest way to be sure about the conformal coating in a waterproof PCB. You just need to verify the label placed on the PCB. Like SR for Silicon coating, XY for Parylene coating, etc.

Waterproof PCB Conformal Coating

Material Testing

If you fail to find the specific label on the circuit board, then try to test the coating materials. This method is also viable in the identification of conformal coating. You can test transparency, robustness, solubility, thickness, etc in this case.

Watch this video:

How Can You Remove The Conformal Coating In Waterproof PCB?

Waterproof PCB needs to go through the repairing process for its better use. Then, you can remove the conformal coating from this PCB. You have to consider the PCB materials, coating materials, and trace dimensions in this case.

The following techniques are effective to eliminate the conformal coating.

Thermal Process

This process applies heat to burn the coating at low temperatures. This burning-through technique effectively withdraws Acrylic, Epoxy, Parylene, Urethane, and Silicon coatings. There is always a chance of overheating and fumes that damage the components.

Scraping

Sometimes, hard types of conformal coating are applied in waterproof PCB. Such as Epoxy, Parylene, urethane, etc. Scraping is useful to remove these kinds of coatings. But, it demands extra care to perform this removal successfully.

Conformal Coating Removal In Waterproof PCB

Chemical Solvent Process

You can apply chemical solvents to eliminate conformal coatings which are sensitive to concentrated chemicals. Acrylic, silicon, and epoxy coatings can be removed in this way.

Micro Blasting

This coating removal system deals with a mixture of dense air and soft grinding. You can excessively use micro blasting during the withdrawal of acrylic coatings.

Besides, peeling is another viable way in this event. This removal is a sophisticated issue. The wrong selection and technique lead to serious damage to your electronic devices.

What Is The Structural Technique Used In Waterproof PCB?

The structural technique is very primary level protection of waterproof PCB. Here, you have to keep the PCB in a box that is waterproof. Usually, most of the materials used in this box are hydrophobic. They deliver effective isolation to the PCB applications.

Waterproof PCB Structural Technique

This conventional way can not provide upper-level protection against water and moisture. But, it is applicable in moderate wet conditions. There are some drawbacks found in this structural method of waterproofing PCB.

• This is not effective for low-scale PCB production concerning the cost.
• The box used here can be deformed due to external stress.

So, its application is relatively low compared to the conformal coating or using epoxy resins. You should choose a waterproofing method based on your PCB requirements.

How To Ensure Impedance Control In Waterproof PCB?

Impedance control is a mandatory subject for a waterproof PCB. It ensures stability in impedance that develops the current conduction of electric circuits. It is required to look after the factors which affect the impedance in this PCB.

Stable Waterproof PCB

Usually, impedance in electronic components depends on the electric permittivity and the dielectric dimensions of the substances. To achieve impedance stability, you should take care of the following issues-

• Select effective materials. It is necessary for maintaining the dielectric properties.
• Ensure temperature control. High temperature increases the impedance in electric circuits.
• Calculate the dielectric thickness concerning the current load of this PCB.

How Do You Compare Conformal Coating With Encapsulation Resin In Waterproof PCB?

Conformal coating and encapsulation are widely used methods to restrict water, moisture, external stress, etc. The comparative anatomy of these two technologies is presented here for you.

Process Of Restricting water

Conformal coating adds a non-conductive layer of dielectric materials. Like Acryline, Silicons, Parylene, etc are notable coatings used in PCB. On the contrary, encapsulation deals with a layer made of resin material. This dark color resin covers the PCB to obstruct water.

Level Of Protection

Encapsulation provides better protection than conformal coating. Parylene, Acrylic, etc coatings require a strong housing facility. But, encapsulation itself resists the entry of water efficiently.

Temperature Effect

Resin materials produce unrestrained heat, which is responsible for decreasing the longevity of PCB. So, encapsulation is less effective in high temperatures compared to conformal coating.

Physical Stability

The resin layer is thicker than the insulating dielectric layer. So, potting or encapsulation of resin renders better physical stability than conformal coating. Electronic devices with resin encapsulation can also tolerate more mechanical pressure.

Conformal Coating in Waterproof PCB

Weight

Conformal coating is suitable for lightweight PCB components. But, encapsulation supports components having different weights.

Use

Both of these techniques are used in numerous applications. Since resin’s heat production is high, the manufacturer avoids encapsulation in some cases. But, its functionality, stress resistance, etc are commendable.

On the other hand, the conformal coating has immense utilization in waterproof PCB of electrical projects. That’s why you should make a choice considering your application.

Is Nano-coating Effective For Waterproof PCB?

Nano-coating saves the waterproof PCB from the contact of liquid substances. This coating method improves the endurance of the electric circuits. It creates an additional layer on the PCB surface. This layer has strong resistance against water.

Waterproof PCB Nano Coating

But, the thickness of this waterproof layer is very low. It is at the nanometer level. That’s why nano-coating is not so effective in all cases. It is viable in micro-electro-mechanical systems (MEMS) and nano-technology.

It delivers impressive performance in the presence of stave-off surface water. Its great solvent protection promotes the electrical performance of waterproof PCB to a large extent. But, you should apply a heavier layer for continuous high water flow.

How Does Temperature Change Affect Waterproof PCB?

Temperature change promotes the deficiency in waterproof PCB. This phenomenon affects PCB in so many ways. Such as:

• Increased temperature reduces the dielectric features of the PCB materials.
• It is difficult to maintain the sustainability of coating because of excessive heat.
• Solder joints get damaged for this issue.
• Inconsistent and excessive temperature change hampers the thermal resistance of PCB applications.
• Impedance is increased due to a high temperature.
• Thermal dissipation becomes difficult in a significant temperature change.

Effective Waterproof PCB

That’s why you have to design a waterproof PCB considering these effects of temperature change. Only a worthwhile and experienced manufacturer can assure you of PCB having a controlled thermal state. So, contact us.

Can Waterproof PCB Be Customized?

Definitely. Waterproof PCB allows customization during the manufacturing process. That means you can make your PCB compatible with your required circuit design.

It renders you an ideal opportunity to add a wireless charging facility, radio frequency transmission, etc in this protective PCB. Moreover, you can incorporate power amplifiers here.

These additional features make your projects more secure and functional even in extremely wet conditions. This facility is not common for all PCB suppliers. So, you need to consult about the PCB custom solutions to a trusted manufacturer.

Customized Waterproof PCB

Which Surface Finish Is Good For Waterproof PCB?

Usually, ENIG (Electroless Nickel Immersion Gold) and HASL (Hot air solder level) are useful surface finish methods for waterproof PCB. Both of these processes add some value to the PCB performance. Such as:

• These methods are appropriate for applying conformal coating and encapsulation on the PCB surface.
• ENIG is supportive of the strong solder connection. It reduces the chance of getting oxidized.
• You can switch the coating components without serious hassle in these cases.
• ENIG and HASL are highly resistant to corrosion.
• The immersion gold surface finish makes the PCB surface flatter. So, you can manage the placement of vias and components easily.

ENIG Surface Finish In Waterproof PCB

Between these effective surface finish technologies, ENIG delivers better performance in this PCB application. Watch this video:

What Is A Waterproof PCB Enclosure?

A waterproof PCB enclosure is one kind of PCB protective apparatus. You can keep the PCB inside of this enclosure. IP68 PCB enclosure restricts water successfully and saves the PCB.

Its impressive IP ratings and durability make it usable both outdoors and indoors. The PCB enclosure is made of waterproof materials. That’s why it can provide sufficient protection to the water-sensitive PCB.

Waterproof PCB Enclosure

It is recommended for you to use the enclosure even if you apply resins or conformal coating. It makes a strong barrier around the PCB along with the coating methods.

How Can You Test Waterproof PCB?

Waterproof PCB testing includes many trustworthy methods. Here the flying probe test and the AOI test are explained below.

Flying Probe Test

In this case, the inspector of the testing touches the surface through the conductive probes. A certain current is applied during this inspection. Then you can see the signals. PCB soldering, wiring, wrong connections, etc can be tested in this cheap flying probe test.

Waterproof PCB Testing

AOI Test

Here, The automated optical inspection machine captures the PCB images. Then, this machine checks its problems by comparing it with a perfect PCB. It is run rapidly. This reliable testing costs relatively high.

Can You Use Waterproof PCB In A Multilayer PCB Stackup?

Waterproof PCB’s features are highly effective for the multilayer PCB Stackup. It requires maintaining different dielectric constants for separate layers. Besides, the use of the right surface finish and vias are important factors in the multilayer PCB design.

Multilayer Waterproof PCB

The materials used in waterproof PCB have a good reputation for their dielectric properties. These dielectric substances deliver a large span of relative permittivity to the PCB layers.

Again, thermal management is essential for the waterproof PCB. That’s why you have to place the PCB vias efficiently. This property makes it compatible with the multilayer PCB stack-up. It dissipates the heat with great effectiveness.

So you can apply this PCB in small size PCB projects. It becomes supremely functional in high-speed communication devices.

What Are The Limitations Of Waterproof PCB?

The most considerable limitations of waterproof PCB are-

• It demands a lot of time to apply resin or conformal coatings.
• If you fail to choose the right technique, it will be dangerous for your device.
• It increases the cost of high-volume waterproof PCB production.

Faultless Waterproof PCB

Contact us. We are trouble-free PCB at reasonable prices. You can also enjoy reliable OEM service through professional PCB specialists.

Conclusion

Waterproof PCB promotes the application of gadgets in humid situations. You can use it conveniently in high-frequency data transmission services. The integrity of the PCB projects is enhanced greatly.

PCBMay offers OEM service for this PCB. This FAQ guide explains all important factors of waterproof PCB efficiently. We think you don’t face any difficulty in manufacturing this PCB. Contact us for more information.