Your Reliable Surface Finish PCB Manufacturer in China

In China, PCBMay is the best surface finish PCB manufacturer since 2008. We can custom different types PCB based on your designs.

  • Over 50 design engineers
  • 12 years’ production experiences
  • Export products to 60+ countries
  • 7/24 hours engineering support
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Surface finish PCB is Your Best Choice for Your Project

PCBMay is an expert printed circuit board or PCB manufacturer in China. From the beginning, we specialize in the entire PCB assembly, including our surface finish PCB for your project. PCBMay is also custom-made depending on your specifications. We need your designs, ideas, or drawings, and our professional design engineers will handle the rest. We own high-tech machines to fabricate your PCB – 100% durable and extreme quality. Please send us your inquiries today!

Types of Surface Finish PCB Meet Your Requirements

Electrolytic Nickel Gold Surface Finish on PCB

The electrolytic nickel gold surface finish on PCB is one best-selling in the market. We use gold since it offers a tarnish resistance, good electrical conductivity, etch resistance, and great solderability after storage.

ENEPIG Surface Finish PCB

The ENEPIG surface finish on PCB is one popular product we offer. Palladium, gold, copper, and nickel are the four metals layers in the product. These are perfect for meeting your demanding requirement.

ENIG Surface Finish PCB

ENIG, or Electroless Nickel Immersion Gold, is a surface finish on PCB with two metallic coating layers. These have strong resistance to corrosion and lead-less function. These become common due to liability regulations.

HASL Surface Finish PCB

HASL Surface Finish PCB is the perfect surface finish for reliable shelf life and durable solder joint. PCBMay has over ten years in making HASL PCB.

Immersion Silver Surface Finish PCB

PCBMay offers immersion silver surface finish PCB with low cost available, superior shelf life, excellent solderability, and covered wide applications. Your custom request for this product is always welcome.

Immersion Tin Surface Finish PCB

We can help you custom design your immersion tin surface finish PCB. We make sure each product meets the IPC Class 2/Class 3 standards. Featuring a longer storage time and can be in electrical measurement or visual inspection.

Why Choose PCBMay for Your Surface Finish PCB

For more than ten years in China, PCBMay is experienced enough and owned numerous equipment types to manufacture high-quality printed circuit boards for business or projects. We make sure our surface finish PCB is low cost, re-workable, widely applicable, longer shelf life, and has more advantages.

PCBMay is a specialist PCB manufacturer for you. If you have more inquiries regarding our surface finish PCBs, directly contact our team. We’re 24/7 hours available.

VPC Plating Line

Related Surface Finish PCB Boards

Blue PCB Surface Finish
Blue PCB Surface Finish
PCBMay Blue PCB surface finish is low-cost, lead-free solder, wire bondable, tight pitch, and repairable.
Carbon Board Double-sided PCB Surface Finish
Carbon Board Double-sided PCB Surface Finish
Our carbon board double-sided PCB surface finish is a good option. It has a good shelf life, can be stored for up to six months.
Colour Red PCB Surface Finish
Colour Red PCB Surface Finish
It is ideal for aluminum wire bonding, corrosion-resistant, good solder-ability, fine-pitch technology, and longer shelf-life.
Fiberglass PCB Surface Finish
Fiberglass PCB Surface Finish
Unique surface finish. PCBMay fiberglass PCB surface finish has a smooth surface, cost-effective, and re-workable.
HDI PCB Surface Finish
HDI PCB Surface Finish
PCBMay is an expert in HDI PCB surface finish production for 10+ years. Environmentally friendly item, lead-free, and can be your go-to surface finish.
Lead-free PCB Surface Finish
Lead-free PCB Surface Finish
We will produce a lead-free PCB surface finish based on your demanding requirements. It offers a simple process, low cost, and easy to repair.
OSP Surface Finish PCB
OSP PCB Surface Finish
PCBMay OSP surface finish PCB is ideal for lead-free soldering uses. It is your mature surface finish choice, a well-known finish for your projects.
Printed Circuit Board Surface Finish
Printed Circuit Board Surface Finish
PCBMay has long industry experience in manufacturing printed circuit board surface finish. It is very economical and universally available.

Surface finish PCB Production Details As Following Up

Brown Oxide
PTH Line
VCP Plating   AOI  Exposure E-Test
Layer Count1-40layers
Base MaterialKBShengyiShengyiSF305FR408FR408HRIS410FR406GETEK370HRIT180ARogers4350BRogers4000PTFE Laminates(Rogers seriesTaconic seriesArlon seriesNelco series)Rogers/Taconic/Arlon/Nelco laminate with FR-4 material(including partial Ro4350B hybrid laminating with FR-4)
Board TypeBackplane、HDI、High multi-layer 、blind&buried PCB、Embedded Capacitance、Embedded resistance board 、Heavy copper power PCB、Backdrill.
Board Thickness0.2-5.0mm
Copper ThicknessMin. 1/2 OZ, Max. 10 OZ
PTH Wall25um(1mil)
Maximum Board Size1100*500mm(43”*19”)
Min laser drilling size4mil
Min. Spacing/Tracing2.7mil/2.7mil
Solder MaskGreen, Black, Blue, Red, White, Yellow,Purple matte/glossy
Surface TreatmentFlash gold(electroplated gold)ENIGHard goldFlash goldHASL Lead freeOSPENEPIGSoft goldImmersion silverImmersion TinENIG+OSP,ENIG+Gold finger,Flash gold(electroplated gold)+Gold finger,Immersion silver+Gold finger,Immersion Tin+Gold finger.
Min. Annular Ring3mil
Aspect ratio10:1(HASL Lead freeHASL LeadENIGImmersion TinImmersion silverENEPIG);8:1(OSP)
Impedance control±5ohm(<50ohm), ±10%(≥50ohm)
Other TechniquesBlind/Buried Via
Gold Fingers
Press Fit
Via in Pad
Electrical Test

Here there’re many laminate material datasheets, they’re useful and helpful for you, please see them:

TU-872Modified EpoxyDOWNLOAD2003403.8-4.03.8
RO 3010Cer/PTFEDOWNLOAD50010.2
RO 4003Hydrocarbon/CerDOWNLOAD>2804253.38
RO 4350BHydrocarbon/CerDOWNLOAD>2803903.48
RT/duroid 5880PTFE/GlassDOWNLOAD5002.2
ISOLAPolyclad 370HRFR4DOWNLOAD1703404.8-5.1
HitachiMCL-BE- 67GModified EpoxyDOWNLOAD1403404.94.4
MCL-LX-67YSpecial LaminateDOWNLOAD185-195325-3453.4-3.6
NelcoN4000-13Modified EpoxyDOWNLOAD210-2403653.73.6
N4000-13EPModified EpoxyDOWNLOAD210-2403503.43.2
N4000-13SIModified EpoxyDOWNLOAD210-2403503.43.2
N4000-13EP SIModified EpoxyDOWNLOAD210-2403503.43.2
ArlonArlon 25NCerDOWNLOAD2603.38
Arlon 25FRCerDOWNLOAD2603.58
Arlon 33NPolymideDOWNLOAD>2503534
Arlon 35NPolymideDOWNLOAD>2503634.2
Arlon 85NPolymideDOWNLOAD2503874.2
StablcorST325DOWNLOADThermal conductivity:75w/m.k(with 1oz copper)
ST10DOWNLOADThermal conductivity:325w/m.k(with 1oz copper)
Bergquistht-04503DOWNLOADThermal conductivity:2.2w/m.k(with 1oz copper)


PCBMay offers flexible shipping methods for our customers, you may choose from one of the methods below.

1. DHL

DHL offers international express services in over 220 countries.
DHL partners with PCBMay and offers very competitive rates to customers of PCBMay.
It normally takes 3-7 business days for the package to be delivered around the world.

DHL Forwarder

2. UPS

UPS gets the facts and figures about the world’s largest package delivery company and one of the leading global providers of specialized transportation and logistics services.
It normally takes 3-7 business days to deliver a package to most of the addresses in the world.

UPS Forwarder

3. TNT

TNT has 56,000 employees in 61 countries.
It takes 4-9 business days to deliver the packages to the hands
of our customers.

TNT Forwarder

4. FedEx

FedEx offers delivery solutions for customers around the world.
It takes 4-7 business days to deliver the packages to the hands
of our customers.

Fedex Forwarder

5. Air, Sea/Air, and Sea

If your order is of large volume with PCBMay, you can also choose
to ship via air, sea/air combined, and sea when necessary.
Please contact your sales representative for shipping solutions.

Note: if you need others, please contact your sales representative for shipping solutions.

On our website you can use the following payment methods:

Telegraphic Transfer(TT): A telegraphic transfer (TT) is an electronic method of transferring funds utilized primarily for overseas wire transactions. It’s very convenient to transfer.

Bank/Wire transfer: To pay by wire transfer using your bank account, you need to visit your nearest bank branch with the wire transfer information. Your payment will be completed 3-5 business days after you have finished the money transfer.

Paypal: Pay easily, fast and secure with PayPal. many other credit and debit cards via PayPal.

Credit Card: You can pay with credit card: Visa, Visa Electron, MasterCard, Maestro.

    Your Leading Surface Finish PCB Supplier in China

    Do you need a surface finish PCB for your business or projects? PCBMay is the best manufacturer you can choose. We’re a China-based leading PCB manufacturer since established in 2008.

    PCBMay employs expert and skilled design engineers to custom your surface finish PCB. We have a factory equipped with advanced machinery and high-tech equipment for PCBs production.

    Since the surface finish is important for PCBs, and we can custom them for you. It functions to prevent copper, the ground plains, exposed traces, holes, and pads from oxidation. This one function is an essential requirement to ultimate application performance.

    All surface finishes PCBs we offer to meet the IPC Class 2 and Class 3. It carries the quality you need for a specific application.

    PCBMay’s surface finishes PCB features fast speeds is high-density, and is light in weight. Unique, lead-free, and modern surface finishes meet the ROHS and WEEE directives. All PCBs are affordable to fit your budget.

    To determine the suitable surface finish PCBs for your application, we can assist and gives recommendations. We will make it easier for you, so trust our full capabilities. For assistance, you can send our expert engineers a call or email.

    The PCB surface finish types include ENEPIG, ENIG, immersion silver, electrolytic nickel/gold – Ni/Au, immersion tin or white tin, lead-free HASL, OSP, etc. All have a longer shelf life and high resistance to drop and shock.

    For all application environments that require stability, high-heat, vibration, or thermal, surface finish printed circuit booard is ideal for you. And PCBMay is the best, reliable manufacturer in China you can depend on.

    Surface Finish PCB

    We export our surface finish PCBs to more than 60 countries all over the world. Before mass production, we use raw quality materials to fabricate longevity, durable, and high-performance PCBs.

    For further inquiries about any PCBs, kindly contact us.

    Surface Finish PCB: The Ultimate FAQ Guide

    Are you worried about the decay of PCB surfaces?

    Then surface finish will bring out calmness in your mind. Usually, surface materials of PCB lessen their efficiency due to various corrosions. Different kinds of surface finishes act to prevent any kind of decay. That’s why this is a highly effective solution for PCB-driven devices.

    Do you know about the pros and cons of surface finish PCB? Don’t be nervous. PCBMay is a worthwhile manufacturer of surface finish PCB for a long period. We are here with this FAQ guide to inform you about this PCB technique.

    Let’s start.

    What Is a Surface Finish PCB?

    It refers to the covering of the uninhabited surface of PCB. Electrically conductive chips on PCB are plated in different ways. It is useful for optimizing the copper traces.

    Surface Finish PCB

    Surface Finish Printed Circuit Board

    Usually, nickel(Ni), gold(Au), lead(Pb), silver(Ag), tin(Sn), etc materials are widely used in surface finish printed circuit boards. These metals are extremely functional to minimize the corrosive properties of copper in surface finish printed circuit boards.

    Besides, they are applicable for solving soldering issues of PCB. To achieve optimum performance of electrical circuits, using surface finish PCB is the most convenient way.

    What Are The Types Of Surface Finish PCB?

    It shows versatility according to its procedure.  Basically, there are two types of surface finish printed circuit boards.

    • Metallic surface finish PCB
    • Organic surface finish PCB

    Different Types Of Surface Finish PCB

    Different Types Of Surface Finish PCB

    You will find various types of metallic surface finishes concealing which metal is used for coating. Such as:

    But, the organic surface finish doesn’t have much variety. OSP(Organic Solderability Preservative) is the most common organic surface finish. All of these types have different positive sides and drawbacks.

    How Does Surface Finish PCB Function?

    It is crucial for numerous applications. This is applied to impede corrosion and oxidation of the copper surfaces. All of its categories use coating mechanisms to make a barrier layer outside of the surface.

    Surface Finish PCB With High Functionality

    Surface Finish PCB With High Functionality

    You can cover the copper by using different metals like gold, silver, etc. Again, organic ways can be applied in this case. This layering provides the required protection to the copper surface from being connected to the outer environment.

    Besides, surface finish PCB has a reputation for promoting solderability. That’s why it has become a trustworthy PCB solution nowadays.

    What Are The Advantages Of Surface Finish PCB?

    Surface finish PCB is now the most effective protective measure for PCB surfaces. Various types of surface finish processes provide immense benefits to electric devices.

    Such as:

    • Increasing the resistance against surface decaying
    • Promoting the solderability of PCB
    • Enhancing the functionality of devices
    • PCB turns into more thermal resistive
    • Maintaining the constant flow of electricity
    • The service life of PCB increases
    • It usually causes no harm to the environment
    • It prevents oxidation in PCB surfaces
    • It is designed to promote compatibility with high-volume projects.

    Surface Finish PCB

    Surface Finish PCB

    How Can You Choose The Best Surface Finish PCB?

    There are various methods available for surface finish PCB. But, you can choose the best surface finish circuit board considering some key factors. Such as:


    This is a crucial factor for surface finish printed circuit board. Solderability affects the performance of PCB to a large extent. You should select the PCB which offers high solderability.

    The Best Surface Finish PCB

    The Best Surface Finish PCB

    Besides, the number of PCB soldering influences the surface finish board. All of them are not compatible with multiple soldering.

    Wire Bonding

    The metal used in the wire bonding affects the choice of surface finish circuit board. Like, aluminum and gold wire bondings are applicable for ENIG and ENEPIG surface finish.


    Some surface finish circuit boards require a big budget. That’s why you should consider the cost-effective surface finish printed circuit board for your convenience.

    PCB Size

    The number of PCB and PCB sizes also determine which surface finish PCB will be suitable. Even and thin pads are effective for PCB applications. These properties reduce impedance problems and effectiveness.


    It should be highly durable. To provide the best performance in different thermal states, sound durability keeps the surface finish PCB one step ahead.

    RoHS Certification

    Your surface finish printed circuit board must be RoHS certified. You also need to ensure that it creates no serious problems for nature.

    These considerations will lead you to the best surface finish for your PCB projects. Watch this video for your convenience:

    What Is A Black Pad On Surface Finish PCB?

    Black pad is a special displeasing condition of surface finish circuit board. This is usually seen when gold is used for ENIG surface finish. It is a serious drawback for PCB surfaces.

    Black Pad In Surface Finish PCB

    Black Pad In Surface Finish

    Black pad impedes the smooth flow of electrons through PCB. Again, it reduces the solderability via the uneven pads. Usually, a discharge of sulfur from the solder mask creates this problem.

    Is Metallic Surface Finish Better Than The Organic Surface Finish PCB?

    The metallic surface finish consists of some high conductive metals like copper, nickel, palladium, silver, gold, etc. On the other hand, organic surface finish deals with organic compounds rather than metals.

    Metallic surface finish PCB shows higher quality performance than organic surface finish. The reason behind it includes-


    Metallic surface finish is easier to test than organic surface finish. Since it deals with metals, you have to face less difficulty in the inspection.

     Metallic Surface Finish PCB

    Metallic Surface Finish PCB

    Thermal cycles

    Unlike organic surface finish printed circuit board,  ENIG or HASL provides thermal resistivity for a long cycle. The shelf life of metallic surface finish PCB is long. Organic surface finish PCB like OSP lasts for a maximum of 2 cycles.


    OSP never supplies enough protection against corrosion as metallic surface finish boards. Gold, palladium, silver, etc metals are supremely effective to resist the decay of PCB surfaces.

    Besides, metals impede oxidation to a  large extent. Thus, organic surface finish boards lack reliability.


    The mechanism of metallic surface finish PCB is a little bit more complex than OSP. But, it sustains for a long period. OSP creates some serious problems while coating. Like, the solvents used here eliminate OSP.


    Metallic surface finish PCB promotes solderability considerably. That’s why it is the most widely-used surface finish method.

    Is ENIG Preferable To HASL Surface Finish PCB?

    ENIG and  HASL both surface finishes have versatile uses. But, ENIG surface finish is preferable to HASL from many angles.

    • HASL contains harmful lead. Besides, fusion oil and flux of HASL emit injurious rays. On the contrary, ENIG is free from lead and emission. That’s why the ENIG PCB is more nature-friendly than the HASL.
    • ENIG surface finish is a gold coating technology. It results in a flat surface. That means ENIG is compatible with large BGA productions. HASL can’t render flatter surfaces as ENIG.

    ENIG Surface Finish PCB

    ENIG Surface Finish PCB

    • There is no bridge effect seen in ENIG. But, HASL surface finish forms a bridge while attaching components with the PCB surface.
    • HASL surface finish has a lower price than ENIG. But, ENIG surface finish provides a long service life. So, its effect of high cost lessens. Besides, both of these surface finish PCBs have a similar price in the case of more layers.
    • When protection from corrosion comes in place, ENIG surface finish delivers better performance than HASL.
    • The thermal resistivity of ENIG surface finishes PCB is more effective compared to HASL.
    • ENIG surface finish is extremely efficient for high-density applications. But, HASL isn’t so reliable in that case.

    So, ENIG surface finish is applied in more applications because of their superior performance than HASL.

    What Is A Lead-free HASL Surface Finish PCB?

    Lead-free HASL (Hot Air solder Level) surface finish uses copper, germanium, or nickel instead of lead. Since lead is injurious to nature, HASL is discouraged by RoHS. Lead-free HASL is ideal for nature.

    Lead-Free HASL Surface Finish PCB

    Lead-Free HASL Surface Finish Printed Circuit Board

    This surface finish is low-cost and easy to manufacture. HASL without Lead can be applied in a high volume of PCB production. It provides impressive solderability. Again, Lead-free HASL is compatible with temperature change.

    But, it has some negative sides due to the absence of lead. Lead-free HASL requires a high temperature for solder processing. Besides, it creates the bridging effect that hampers the smooth flow of electricity.

    What Immersion Coatings Are Used In Surface Finish PCB?

    Surface finish PCB with immersion coating is a popular method to eliminate deterioration of PCB surfaces. It has two categories. Let’s have a look at these immersion coatings.

    Immersion Silver

    Silver covering is applied through electroplating over copper trace in immersion silver coating surface finish PCB. A layer of less-reactive gold is added with silver. This is useful to prevent oxidation.

    Immersion Silver Surface Finish PCB

    Immersion Silver Surface Finish PCB

    Immersion silver coating offers impermeable PCB packaging. This renders the opportunity to a long time carry-out of the soldering process. Besides, it is beneficial to small chips and BGA( Ball Grid arrays).

    That’s why The copper-silver combination is highly compatible with surface finish PCB.

    Immersion Tin

    Here, copper traces are electroplated by tin(Sn). Immersion tin coating of surface finish PCB does not last so long compared to the immersion silver. But, this is comparatively cost-effective.

    Again, copper-tin amalgamation provides sufficient thermal resistivity for surface finish PCB. Its soldering process is also commendable.

    Immersion tin has some limitations. Like, it is not compatible with the removable solder mask projects. You need to use protective gloves while applying immersion tin coating in surface finish PCB. Moreover, this is not widely used in small numbers of PCBs.

    Which Surface Finish Is Suitable For Multilayer PCB?

    ENIG surface finish is the most suitable for multilayer PCB design. Here, a fusion of nickel and palladium coating is found. This allows ENIG surface finish to apply multiple layers of materials.

    ENEPIG Surface Finish PCB

    ENIG Surface Finish

    A gold layer is also applied over the palladium coat to resist oxidation. That means the ENIG surface finish circuit board operates in 3 layers. This property turns it into a low-cost surface finish PCB.

    In multilayer PCB applications, you need to comprise rapid speed, planarity, long lifespan, and high solderability, etc. ENEPIG surface finishes PCB provides all of these features efficiently.

    Thus, you can use it for multilayer PCB.

    What Are The Comparisons Between ENIG And ENEPIG Surface Finish PCB?

    There is a comparison between ENIG and ENEPIG surface finish PCB. ENIG surface finish is used more extensively than ENEPIG. But, ENEPIG is getting popular in many cases nowadays.

    ENEPIG Surface Finish PCB

    ENIG VS ENEPIG Surface Finish PCB

    We are explaining the distinguishing factors between these two surface finish PCBs now.

    • ENIG lasts for a longer time than ENEPIG.
    • ENIG has a longer shelf life compared to the ENEPIG surface finish.
    • ENIG renders sufficient evenness and planarity to PCB. So, it is compatible with small components. But, this quality is not so useful in ENEPIG.
    • ENIG surface finish offers an easier mechanism.
    • ENIG delivers a flatter surface than ENEPIG surface finish.
    • ENIG provides more solderability compared to the ENEPIG surface finish.
    • ENIG surface finish occurs less oxidation.
    • Since ENIG is lead-free, it is more effective to nature than ENEPIG.
    • The thermal resistivity of ENIG surface finish is higher than ENEPIG.
    • ENIG suffers from black pad sometimes. But, ENEPIG surface finishes PCB is free from this problem.
    • Unlike ENIG, ENEPIG has an extra layer of palladium. So, ENEPIG provides more effective wire bonding than ENIG.
    • The wettability of ENEPIG is slightly higher than the ENIG surface finish.

    So, the ENIG surface finish is superior to ENEPIG in many aspects.

    Is Hard Gold Surface Finish Good For PCB Gold Fingers?

    Yes. Hard gold surface finish PCB is effective for PCB gold fingers. Do you know about the gold fingers PCB?

    PCB gold fingers are some gold-covered columns. These columns are found by the side of PCB connecting edges. PCB gold fingers are useful to build connections between many PCBs. Hard golds which have 99.6% purity are highly useful for making gold fingers PCB.

     PCB Gold Fingers

    PCB Gold Fingers

    This surface finish ensures the fitting of gold fingers PCB in specific places of the motherboard. The high planarity and sufficient layer thickness are required to make gold fingers PCB.

    Besides, hard gold coating of surface finish PCB promotes electrical conductivity. This property is used in establishing the edge connection of gold fingers PCB.

    What Are The Drawbacks Of Electrolytic Wire Bondable Gold Surface Finish PCB?

    Electrolytic wire bondable gold surface finish PCB has extensive uses. Here, a  layer of hard or soft gold is electroplated on the nickel layer. Gold renders high charge conductivity, etch resistance, solderability, etc.

    Soft golds and hard golds are 99.9% and 99.6% pure respectively. Both of these golds have immense uses in surface finish PCB. But, electrolytic gold surface finish PCB also has some drawbacks. Let’s have a look at its limitations.

    • Hard gold surface finish is not solderable for more than 17
    • The connection between electrolytic gold and terminal points requires technical lead. This addition and elimination of technical leads consume time.
    • The sidewalls of surface trace don’t get sufficient finish
    • Electrolytic gold surface finish is not effective for high-density PCB applications.
    • It is not reworkable
    • This is a costly surface finish
    • Sometimes black pad is found here
    • Solder processing is complex
    • Signal loss occurs in the surface finish of RF projects
    • Etching in surface finish causes silvering.
    • It provides poor integrity of the solder joints

    The sum-up of all these limitations turns this surface finish PCB into a less applicable surface finish.

    Can You Use Immersion Surface Finish PCB For Small Productions?

    Both of the two immersion coatings of surface finish PCB are not suitable for small production. Immersion silver is more compatible with the lower numbers of PCBs than immersion tin.

    In the case of surface finishes, time delay in soldering hampers the solder joints. Small productions are interrupted during soldering. This is necessary for cost minimization.

    Immersion Tin Surface Finish PCB

    Immersion Tin Surface Finish Circuit Board

    Immersion silver coating obstructs decaying better than immersion tin. Its copper-silver duo renders sufficient solderability despite the extra time. So, immersion silver is apt for small productions.

    But, immersion tin surface finish supports the large volume productions. Here, solder joints are found perfect due to low time dilation in soldering.

    What Is The ENP Technology In ENIG Surface Finish PCB?

    ENP(Electroless Nickel Plating) is one of the three metallic structures of ENIG surface finish. This is a mixture of nickel and phosphorus.

    Here, the nickel layer can resist the diffusion between gold and copper. Again, it produces (Tri nickel tetra stannic) with tin(Sn). This inter-metallic compound promotes the solderability of surface finish PCB.

     ENP Process In ENIG Surface Finish PCB

    ENP Process In ENIG Surface Finish PCB

    Then, this compound is reduced by. This reduction results in covering the nickel with a palladium surface. Highly active Xyman hydrogen produces nickel and phosphorus from and Pion respectively. That’s why ENP is the amalgamation of phosphorus and nickel.

    What Is The Manufacturing Process Of ENEPIG Surface Finish PCB?

    ENEPIG PCB consists of 4 metallic layers. These layers are made of copper, nickel, palladium, and gold. Except for palladium, other metals are also found in ENIG surface finish PCB.

    ENEPIG Surface Finish PCB Manufacturing

    ENEPIG Surface Finish PCB Manufacturing

    Here, nickel and gold both are defused. Thus oxidation occurs. The palladium layer is used to prevent decay and oxidation of the nickel layer. This enhances the solderability of ENEPIG surface finish PCB.

    Like ENIG surface finish PCB, here palladium is deposited due to the reduction caused by.

    How Can You Apply OSP As A Surface Finish PCB?

    OSP( Organic Solderability Preservative) surface finish PCB does not use metals. You can apply this water-based technique in an ideal humidity and temperature. The procedure of OSP surface finish PCB is as follows:

    • Clean the surface through chemical agents.
    • Pull out the nodules and bumps from the copper surface
    • Rinse the PCB surface by using an acid
    • Apply a thin OSP coating. The total thickness of the coat should be within the nanometer range.
    • Again rinse the layer to prevent ionization.
    • Last but not the least, dry the coat properly.

    OSP Surface Finish PCB

    OSP Surface Finish PCB

    You should avoid sunlight while applying and drying OSP surface finish PCB. This ensures top-quality soldering and corrosion-free surface finish PCB. watch the following video:

    What Are The Benefits Of OSP Surface Finish PCB?

    OSP coating in surface finish PCB offers some impressive benefits. Such as:

    Easy Manufacturing

    OSP surface finish can be used again after being damaged. This happens due to its easy manufacturing process and high durability.


    The entire cost of OSP surface finishes PCB is low. Since it is an organic method, you don’t need to pay more for chemical compounds. Again, its simple fabrication is also responsible for lowering the cost.

    Effective OSP Surface Finish PCB

    Effective OSP Surface Finish PCB


    Surface finish PCB with OSP coating offers notable wettability. This also promotes solderability.

    Flat Copper Surface 

    This surface finish PCB renders a flat copper surface where you can accommodate your PCB components. It enhances the quality of solder joints. OSP surface finish PCB also delivers thermal resistivity due to this property.

    Ecologically Effective

    OSP surface finish is lead-free. That’s why there is no harm in using this organic surface finish PCB.

    Attaching Small Component

    It is compatible with small components of PCB. BGA and small chips are supported by OSP surface finish PCB.

    Except for these, OSP coating provides a long storage period and low use of the ink of solder masks.

    How Can You Choose The Best Manufacturer Of Surface Finish PCB?

    The best manufacturer of surface finish PCB should have some impressive advantages. Such as:

    • A long period of manufacturing experience
    • 7/24 hours technical support
    • Availability of different surface finishes methods
    • Skilled technician for smooth and rapid fabrication
    • Sufficient storage of materials
    • All products must meet the IPC class 2 or class 3 specification
    • Certified by RoHS

    PCBMay is a trustworthy manufacturer of surface finish PCB with 15 years of experience in production. We provide IPC class 2 standard surface finish PCB. So, contact us for experiencing the best PCB.


    Surface finish PCB is the ultimate solution of preventing corrosion of PCB surfaces. Its tremendous benefits make it compatible with versatile applications. PCBMay provides the most effective surface finishes with great manufacturing capability.

    We have tried to cover every corner of the surface finish PCB. We hope this FAQ guide will help you choose the best surface finish PCB. If you have any queries, let us know.

    Stay tuned.

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