PCBMay is the best firm in manufacturing ENIG PCB fabrication and assembly. We offer top-quality ENIG PCBs in many solder mask colors: red, green, black, red, yellow, blue, etc.
- Fully customize according to your ideas
- Over ten years of experience
- 24/7 online support
- Competitive prices and professional after-sale service
ENIG PCB is Your Best Choice for Your Project
PCBMay is your ideal ENIG PCB manufacturer and supplier in China. We could offer numerous layers for ENIG PCB: 1 to 40 layers or customize. Furthermore, PCBMay has been committed to customers satisfaction since the beginning. Our team strives to give a satisfying quality ENIG PCB for your applications. Please take a look at the best ENIG PCB we list below.
Types of ENIG PCB Meet Your Requirements
Why Choose PCBMay for Your ENIG PCB
PCBMay is an expert PCB assembly supplier, and manufacturer in China specialize in ENIG PCB fabrication for more than ten years. We provide a turnkey solution for your business and PCB project. Our company has an advanced production line, complete production capabilities, and an expert workforce.
If you’re looking for a trusted quality ENIG PCB, PCBMay is the ultimate solution. All of our ENIG PCBs surpass different certifications, such as ISO14001, ISO9001, UL, RoHS, and many more. More and more clients around the world trust with PCBMay company for their PCB projects. Be one of us!
Related ENIG PCB
ENIG PCB Production Details As Following Up
|Base Material||KB、Shengyi、ShengyiSF305、FR408、FR408HR、IS410、FR406、GETEK、370HR、IT180A、Rogers4350B、Rogers4000、PTFE Laminates(Rogers series、Taconic series、Arlon series、Nelco series)、Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4)|
|Board Type||Backplane、HDI、High multi-layer 、blind&buried PCB、Embedded Capacitance、Embedded resistance board 、Heavy copper power PCB、Backdrill.|
|Copper Thickness||Min. 1/2 OZ, Max. 10 OZ|
|Maximum Board Size||1100*500mm(43”*19”)|
|Min laser drilling size||4mil|
|Solder Mask||Green, Black, Blue, Red, White, Yellow,Purple matte/glossy|
|Surface Treatment||Flash gold(electroplated gold)、ENIG、Hard gold、Flash gold、HASL Lead free、OSP、ENEPIG、Soft gold、Immersion silver、Immersion Tin、ENIG+OSP,ENIG+Gold finger,Flash gold(electroplated gold)+Gold finger,Immersion silver+Gold finger,Immersion Tin+Gold finger.|
|Min. Annular Ring||3mil|
|Aspect ratio||10:1(HASL Lead free、HASL Lead、ENIG、Immersion Tin、Immersion silver、ENEPIG);8:1(OSP)|
|Impedance control||±5ohm(＜50ohm), ±10%(≥50ohm)|
|Other Techniques||Blind/Buried Via|
|Via in Pad|
Here there’re many laminate material datasheets, they’re useful and helpful for you, please see them:
|SUPPLIER||PCB LAMINATE||TYPE||MATERIAL DATASHEET||TG||TD||DK(1MHZ)||DK(1GHZ)||DK(10GHZ)|
|Hitachi||MCL-BE- 67G||Modified Epoxy||DOWNLOAD||140||340||4.9||4.4||–|
|N4000-13EP SI||Modified Epoxy||DOWNLOAD||210-240||350||–||3.4||3.2|
|Stablcor||ST325||–||DOWNLOAD||Thermal conductivity:75w/m.k(with 1oz copper)|
|ST10||–||DOWNLOAD||Thermal conductivity:325w/m.k(with 1oz copper)|
|Bergquist||ht-04503||–||DOWNLOAD||Thermal conductivity:2.2w/m.k(with 1oz copper)|
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PCBMay- Your Outstanding ENIG PCB Manufacturer in China
PCBMay is your OEM and ODM manufacturer in China, offering competitive prices for ENIG PCB fabrication, design, and assembly services. You can count on us with our 10+ years in the industry. PCBMay is your ultimate ENIG PCB manufacturer and supplier in China.
PCBMay is an expert when it comes to the PCB surface finish. We could offer OSP (Organic Solderability Preservative), HASL, and ENIG (Electroless Nickel Immersion) finish. These three surface finishes have their features and advantages.
The PCB surface finish is a coating between a bare board PCB and a component. There are two fundamental reasons why we need to apply surface finish:
- To ensure solderability.
- To protect exposed copper circuitry.
Depending on your application, PCBMay can offer you high-quality ENIG PCB. ENIG PCB or Electroless Nickel Immersion PCB is the most popular surface finish in the field.
ENIG PCB is a double layer metallic coating. It has nickel as a barrier to the copper and a surface to which components are soldered.
If you require a lead-free PCB, ENIG finish is the answer. Besides, complex surface components (especially flip chips and BGAs) are rising, requiring flat surfaces.
ENIG PCB Advantages
- Flat surfaces
- Excellent for PTH
PCBMay is your ultimate ENIG PCB solution provider in China. We have over ten years in the industry and have been serving more than 1000 customers worldwide.
Our team ensures your ENIG PCB quality from circuit design, fabrication to the ENIG PCB fabrication process. PCBMay has over ten years of innovation and effort in PCB making, becoming one of China’s leading ENIG PCB manufacturers and suppliers.
Being the most trusted manufacturer and supplier, we are proud to supply you with high-quality PCB services that exceed your particular requirements.
Whether you’re a designer, distributor, and supplier of ENIG PCB, PCBMay is your best partner. We are looking forward to working with you soon!
Contact us today!
ENIG PCB: The Ultimate FAQ Guide
One of the reasons for damaging electronic applications is circuit layer oxidation. To get rid of this problem, ENIG PCB is the best choice. Its construction material and construction process are resistant to oxidation and corrosion.
PCBMay has been producing quality ENIG PCB as well as offering customization facilities. This FAQ guide will let you know the details of this PCB. Let’s start.
What Is An ENIG PCB?
ENIG PCB is a type of printed circuit board that has double layer metallic surface plating. Where an electroless nickel layer is covered by a thin gold layer. This is why it is known as Electroless nickel immersion gold.
This surface finish is able to protect the ENIG Printed Circuit Board from degradation, corrosion, and other damages. It can improve the solidarity of copper and works against oxidation.
Therefore, ENIG PCB is now widely used in various applications for durability, growth, and the RoHS regulation as well.
What Are The Materials Of ENIG PCB?
Printed Circuit Boards materials are polytetrafluoroethylene, fiberglass reinforced epoxy resin materials, and conductive metal like Copper, Iron, Aluminum. To fabricate ENIG PCB, two more materials are used such as Nickel and Gold.
To create the nickel layer on the metal surface, usually the copper surface.
Then an auto-catalytic liquid bath is performed on the nickel. This nickel layer is corrosion-resistant.
Also protects the copper layer from the direct conduct of oxidation components. That will increase the durability and shelf life of the ENIG circuits.
Again, the thin gold layer surface finish enables the low contact resistance property. In addition, it also protects the nickel layer from oxidation and damages during storage.
What Are The Features Of ENIG PCB?
The manufacturing process undergoes some steps to develop ENIG printed circuit board features to protect the circuit as well as the EE applications.
Oxidation Resistant ENIG PCB
Electroless nickel immersion gold PCB is constructed with various essential features such as-
RoHS compliant works for Restriction of Certain Hazardous Substances of the circuit board. The Electroless nickel immersion gold circuit board is certified to maintain RoHS standards.
ENIG circuit board construction is free from lead. Also, it is free from 6 harmful substances that are restricted by RoHS compliance.
Coefficient Of Thermal Expansion(CTE)
To construct the high density and featured circuit board, it must have the Coefficient Of Thermal Expansion properties. During the fabrication of ENIG PCB, a certain amount of contraction goes under the thermal change. It’s an essential step at the thermal cycling step.
Again, the ENIG PCB has low CTE that is also matched with the CTE of conductive copper layers.
Dielectric Constant (DC)
The PCB finish provides a consistent and even surface to hold copper traces and PCB components. Also works against oxidation and corrosion.
That will make an effect on the high-frequency signal of the Electroless nickel immersion gold circuit board. That is a noteworthy feature of ENIG circuit board.
What Is The Difference Between ENIG PCB And HASL PCB?
There are some key differences between the Electroless nickel immersion gold printed circuit and the HASL PCB. Here we present the following differences that will help to choose the best one for your applications.
|Property||ENIG PCB||HASL PCB|
|Processing Method||The processing method of ENIG printed circuit boards are quite complex||The fabrication process of HASL PCB is more simple than ENIG PCB|
|Materials||Nickel and gold are the fabrication material of ENIG PCB||Generally lead alloy is the main material of HASL PCB|
|Thickness||The thickness range of the gold layer is 0.05 to 0.23 µm and for nickel layer is 2.5 to 5.0 µm||The thickness of HASL layers varies from 70 micro inch – 200 micro inch|
|Cost||The price range is high for complex processes and manufacturing materials|
|The price range is reasonable comparing to the ENIG PCB|
|Re-working||The ENIG PCB isn’t very suitable for re-working. So far, that may lead to damage to the circuit board.||HASL is familiar with the re-working process without difficulties.|
|Eco-friendly||The Electroless nickel immersion gold PCBs are lead-free, thus eco-friendly||HASL contains lead for special handling, thus not much eco-friendly|
|RoHS Compliance||It is made by following the RoHS compliant properties||It doesn’t follow the RoHS compliant properties|
|Surface quality||The surface of the ENIG circuit board is more even and polished||The surface of the HASL circuit board is uneven and not quite polished|
|Surface Mount Technology||Surface Mount Technology components are easy to place on ENIG PCB for even and flat surface||Surface Mount Technology components are not suitable for the inconsistent surface of HASL printed circuit boards|
|Thermal Property||ENIG circuit can withstand high temperature||HASL printed circuit boards can’t withstand high temperature|
Does ENIG PCB Contain Gold?
The answer is yes and it resides in the name of Electroless nickel immersion gold PCB. Gold is an essential material for manufacturing the ENIG printed circuit board. It helps to prevent circuit boards from oxidation. Also, protect the nickel layer of the printed circuit board.
PCB may offer a custom selection of gold plating, custom gold thickness for your applications circuit boards.
Gold Layer Of ENIG PCB
How Thick Is An ENIG PCB?
The performance and efficiency depend on the layer thickness of ENIG printed circuit boards. The thickness range for gold is from 0.05 to 0 23 µm (2 – 9 µ in). Again the nickel layer thickness range is from 2.5 to 5.0 µm (100 – 200 µ in).
Between these ranges, the ENIG plate can derive the best output and effectiveness. Custom thickness is also applicable for Electroless nickel immersion gold PCBs. Though The measurement of thickness should remain consistent in the circuit.
ENIG PCB Thickness
What Are The Processing Steps Of ENIG PCB?
To get the proper and consistent immersion gold to finish on the Electroless nickel immersion gold PCBs, you need to follow 3 basic steps. Also, you need to design, control, and monitor to achieve the perfect ENIG finish.
The 3 Processing steps of ENIG PCB are as follows-
Copper layer Activation
In order to activate the copper layer, first, you should clean the copper layer properly. The dust, resistant residue, fingerprints, etc are removed in the cleaning process.
That will activate the copper layer as well as create the environment for electroless nickel deposition.
- Micro etching
For the micro-etching process on the copper layer, sulfuric is mostly used. The copper layer is striped and its topography is modified in this step.
After micro-etching, proper rinsing is a vital step to remove the residue. If the copper layer is not rinsed properly, the residue may go to the next steps. That will decrease the efficiency and performance of the copper layer activation step.
The rinsing step creates the perfect base to impose gold and nickel on the copper layer.
Copper Layer Of ENIG PCB
The generation of essential nickel and sodium hypo-phosphite from nickel sulfate in this step. The necessary electron distribution on nickel metal is done by the hypo-phosphate. That will help to reduce the nickel ion of the nickel metal.
This step is done under the temperature range from 175 degrees Fahrenheit to 185 degrees Fahrenheit. Then the nickel layer imposes on the activated copper surface.
To facilitate the gold reduction, the oxidation of nickel-metal produces electrons in the step. The gold layer protects the nickel-metal layer from reduction until the soldering system.
To enable the solderability of ENIG PCB, the thickness of the gold layer must fulfill the criteria of the application requirements.
Watch this video to learn more about how do PCBs work-
What Is Defined By ENIG PCB RoHS?
Restriction of Hazardous Substance is a standard restriction of using some hazardous materials for the printed circuit board fabrication like ENIG PCB. The RoHS compliance strictly restricted mainly 6 hazardous materials such as Lead (Pb), Cadmium (Cd), Mercury (Hg), Hexavalent Chromium (CrVI), Polybrominated biphenyls (PBB), and polybrominated diphenyl ethers (PBDE).
Because they are harmful to health. Also, they have adverse effects on the environment.
In this case, Electroless nickel immersion gold PCB fabricates the surface finish without these materials. So it is RoSH certified and has no health risk as well.
RoHS Certified ENIG PCB
What Is A Black Pad In An ENIG PCB?
The nickel layer corrosion has occurred due to excessive phosphorus. The excessive phosphorus raises the Black Pad fabrication issue on the ENIG Printed Circuit Board planting.
Again, excessive gold deposits on the electroless nickel layer also lead black pad process.
Hence there are several drawbacks of black pad occurrence. It can’t be identified after the compilation of the circuit board plating process. Again, it may also cause solder joints faults.
The manufacturer must be concerned about the black pad process. Besides them, it is also responsible for high manufacturing and repair costs as well as difficulties.
Black Pad Issue In ENIG PCB
What Are The Main Differences Between ENIG And ENEPIG PCB?
|Property||ENIG PCB||ENEPIG PCB|
|Finish layer||A thin gold layer is established on the electroless nickel layer of the ENIG printed circuit||Between the electroless nickel and gold layer, a palladium layer is placed as an additional layer of ENEPIG PCB|
|Material||The main material is gold and electroless nickel|
|The manufacturing materials are gold, nickel, and palladium|
|Reliability||ENIG circuit board is considered less reliable than the ENEPIG PCB||Electroless Nickel Electroless Palladium Immersion Gold is more reliable than ENIG PCB|
|Finish Thickness||The ENIG PCB thickness ranges are 0.05 to 0 23 µm and 2.5 to 5.0 for gold and electroless nickel layers respectively||ENEPIG PCB’s thickness range is 0.05 to 0.1 microns|
|Black Pad occurrence||Black pad occurs between gold and electroless nickel layer for corrasion||There is no chance of raising black pad for the additional palladium layer between the gold and nickel layer cost of ENEPIG PCB|
How Long Is The Shelf Life Of An ENIG PCB?
The ENIG surface finish has a long shelf life compared to other finishing processes. Once you use immersion gold surface finish, that can store the Electroless nickel immersion gold printed circuit for up to 1 year. For this long shelf life, PCBMay has been successfully producing immersion gold PCB surfaces for 15 years.
Longer Shelf Life Of ENIG PCB
What Are The Right Ways To Handle An ENIG PCB?
There is a chance of oxidation and corrosion on the Electroless nickel immersion gold printed circuit boards. The reason behind it is the humidity as well as moisture.
If oxidation occurs, it leads to poor performance as well as damage to the circuitry. Besides, handling by bare hand conduce tarnishing. So proper handling of ENIG PCB is a must.
You should not touch and handle the ENIG PCB by bare hand rather use hand gloves. To withstand the moisture keep the Electroless nickel immersion gold PCB in the airtight storing package.
The PCB backing is another efficient way to prevent circuit board oxidation. That will increase the shelf life as well as overall performance.
What Is The Oxidation Process Of ENIG PCB?
The oxidation process occurs when the ENIG PCB goes through the following conditions-
- If the layers of nickel and gold don’t meet the requirements or are below the needs of the ENIG finish, there is a high possibility of oxidation on the ENIG circuit board.
- The oxidation also may occur for the unclean countertop, poor and dirty storage, or either managed with bare hands.
Internal View Of ENIG PCB
What Is The ENIG PCB Backing?
The ENIG PCB backing is finished before the surface mounting process on the circuit board. It’s the process to drive out the moisture of circuit boards by heating the immersion gold PCB. The heating process is done in an oven.
Make sure you have a focus on the requirements until it may cause damage to the circuit. PCBMay offers the consultation and necessary guidelines to apply appropriate conditions during ENIG PCB Baking.
ENIG PCB Traces
What Are The Advantages Of ENIG PCB?
Electroless nickel immersion gold circuit is a highly featured PCBs with lots of benefits. Some noteworthy advantages of ENIG PCB are as follows-
The construction materials of ENIG PCB are electroless nickel and gold. They are quality full and durable. That property makes the ENIG printed circuits more stable and super durable.
ENIG PCB Materials
The electroless nickel is established for ENIG PCB finish to withstand high heat as well. The nickel-metal has a high heat-resistant capability. The ENIG PCB can resist its layers and functionalities from a high heat for the nickel layer as well as the gold layer.
Corrosion and oxidation resistant
The ENIG PCB is engineered with an electroless nickel layer surrounded by a thin gold layer. Both layers can develop the solidarity of copper. That can resist the immersion gold PCB finish from oxidation and corrosion. Also, resist raising the chance of the black pad system as well.
ENIG PCB is mostly popular for various types of applications for RoHS compliance. It is RoHS compliant certified and free from lead. Also using ENIG circuit board has no health risk as well as being environmentally friendly.
ENIG PCBs are highly reliable Printed Circuit boards. They will work and operate the electronic devices properly. It can continue reliable performance for up to 20 years.
The ENIG PCBs are simple and easy to assemble. For the electrical and electronic devices, immersion gold PCB facilitates a short time and complexity-free assembly process.
ENIG PCB goes through a backing process. That enhances the capacity to resist moisture and humidity. Also helps the ENIG printed circuit board to keep healthy and perform well.
Higher Mechanical Strength
The efficiency and performance won’t decrease for higher mechanical strength. You can fabricate ENIG printed circuits repeatedly as well as modify them. That won’t affect the performance of ENIG PCB
Thermal Resistance Capacity
They are referred to as high-temperature PCBs. It can resist high heat and protect the printed circuit board layers from shorts and melting down.
ENIG Printed Circuit Boards are ideal for planting through holes. The flat and consistent surface is effective for plated through holes,
The ENIG PCB has great bond strength so that it can be stored easily. That will not lead to any damages as well. Moisture resistant
Long shelf life
It has a long shelf life, which reduces the chances of damaging devices after a few days. It is a crucial reason for its widespread use in various electrical and electronic devices.
It is considered a versatile printed circuit board. It can be single-layered or multi-layer printed circuit boards. Also, it is lightweight and can be used in small to large electrical and electronic devices.
Are There Any Limitations Of ENIG PCB?
Besides a lot of advantages, ENIG circuit has some limitations such as-
It somehow damages the ENIG circuit of any applications, it’s hard to repair again.
Once the ENIG printed circuit board is fabricated, re-working or updating is a very complex procedure. Sometimes it’s not possible at all. So the application requirements should be fulfilled during the manufacturing process.
The materials and construction process make the ENIG PCB quite expensive than other printed circuit boards.
The black pad may occur during nickel bathing for excess phosphate at the electroless nickel and gold layers. That may cause performance degradation.
Does ENIG PCB Planting Contain Lead?
No, the ENIG PCB planting doesn’t contain any lead. It follows the RoHS directive strictly to manufacture the circuit boards.
For this reason, they are environmentally friendly and do not harm you. Also, it facilitates a wide range of usage in various applications.
Lead-free ENIG PCB
What Are The Applications Of ENIG PCB?
For a vast number of advantages, its use in the tiny to giant applications in various fields. ENIG PCB can be used in the household for aerospace applications such as
Consumer electronics should be handy and user-friendly. At the same time, they should be durable for regular use and have a long shelf life. ENIG PCBs make consumer electronics more lightweight, flat, and handy. In TV, refrigerator, mobile, mp3 player, laptop, printer, etc all consumer electronic applications are using ENIG PCB for versatility and efficient performance.
Automobile electronic applications have circuitry that helps to enable effective and smooth riding. The circuit boards should be durable, heat resistant, and have great mechanical bonds. All are the features of Electroless nickel immersion gold printed circuit board.
Generally, the ENIG PCBs are used in the vehicle’s applications such as car sensors, ignition, radio, computers, in-car entertainment systems, telematics, and so on.
In the medical industry applications, the use of ENIG PCB is increasing day by day. For moisture resistance, easy storage, and accuracy, ENIG circuit boards are used for medical electronic applications.
Almost all medical devices are manufactured by PCB including the pacemaker, drug-releasing pumps, diagnostic equipment, hearing aids, CT, and CAT, ultrasonic scanners, etc.
Computers, laptops are the parts to operate our daily life with advanced technology. The internal circuitry of computer components contains ENIG PCB for oxidation resistance, thermal stability with longer shelf life.
Safety and Communication
The Electroless nickel immersion gold printed circuit boards play a vital role in the safety and communication field. Almost all safety and communication electronics can use ENIG PCB. As an ENIG circuit is lightweight and has performance efficiency, It includes the Smoke detector, drone, automatic car, telecom tower, etc applications.
The Electroless nickel immersion gold PCB has been used for fabricating aerospace electronics as well. The ENIG PCB ensures long shelf life as well as consistent performance. That will gain the faith to use in even aerospace electronic applications. For example, satellite structure, accelerometers, internal components, space shuttles, radio communication systems, and so on.
Security and Military
In the security electronic applications, Electroless nickel immersion gold circuit has an important part like in CCTV, automatic door lock, radar, alarm system. It can perform for a long time without any damage. Again in military electronics, ENIG PCB is a popular choice. Radio jamming, radar jamming, etc are examples of it.
ENIG PCB Of CCTV
For industrial purposes, ENIG PCB is used for durability, oxidation and corrosion resistance, thermal capability, and so on. The Electroless nickel immersion gold PCB is successfully used in solar power cogeneration, electric drills, DC-to-AC power inverters, and other major and minor industrial electric equipment.
Hopefully, you have no confusion about the Electroless nickel immersion gold printed circuit board now. PCBMay offers custom ENIG printed circuit board construction based on the application requirements as well.
The performance and advantages of the ENIG circuit board are up to the mark. Hence, it is widely used for various applications to make our life smooth and easier. Get in touch with us for further information.