How to Guarantee PCB Edge Plating Quality

Discoveries come up at different periods in life that change choices. This is common to human nature. It reflects on products, design and applications among others. Research effort on the changes at such times to meeting demands becomes imperative.

The electronic and electrical industry is not left out of the change drive. Change becomes inevitable in PCB production due to its global acceptance. The PCB edge plating becomes one of the vital requirements. It is a measure put in place to secure powerful link-ups through the PCB. PCB Edge plating minimizes challenges that might be difficult to correct.

The advantages the PCB edge plating has raise its demand. The change of choice by the users to PCB copper plating makes the process more tasking. This article will give answers to the following questions. What is PCB plating, PCB copper plating and PCB through hole plating. The definition of PCB plating sets the tone for this informative article.

What is PCB Edge Plating?

PCB Edge plating is a procedure by which copper design gets stricken to different segments of the PCB. This passes through the surface of the board most times, and runs through the PCB. In the same way, one of the edges must have a copper design.

The PCB board needs coating for preservation. This often comes up when the outer layer is being prepared for finishing. It does not only preserve the open metal from rustiness, it also helps to solder elements.

PCB board contains a blend of both conductive and non conductive components. They are being fixed on different surfaces such that electrical affinity is on the board.

The PCB edge plating is important because it helps in producing a firm connection with the PCB. It commands high demands by various industries because of its many advantages.

Request PCB Edge Plating Quote, Pls send PCB files to Now

Advantages of PCB Edge Plating

The benefits of having PCB edge plating on devices include the following:

  • It enhances the integrity of the PCB by turning over a better current distribution in the PCB
  • Shields the connections available in other edges
  • It helps in providing escape routes when temperature within the PCB is high
  • The PCB edge plating also boostssignals in the PCB.
  • PCB edge plating gives a satisfactory use of the board at its maximal.

PCB Plating

In discussing PCB plating, attention centers on the multi layer PCBs. This is because the multi layer PCB design allows the use of different types of plated through holes. This viewpoint may be correct but the PCB plating is broader than the multilayer PCB alone. The production process is incomplete without bringing up the PCB plating process.

The definition of PCB plating is important to aid proper understanding of the topic. Thereafter, discussion on the whole plating process follows. Defining PCB plating from one or both viewpoints below is crucial.

Superficial Plating

This involves shielding traces of the outer metallic component from damages. Such defecting factors include contamination, environment, oxidation and moisture which can alter design.

Via Plating

Topping up of holes on the PCB by copper is via plating. Its aim is to provide an appropriate movement path for currents. This current can travel from one layer to another; it can be between the internal layer and the outer layer.

The main aim of the above system is to keep itch free flow of currents within the PCB even though materials differ.

The PCB Plating Materials

The materials associated to PCB plating are metallic blend which comprises these metals:

Superficial Plating

For superficial plating, the materials include:

  • Nickel
  • Gold
  • Tin
  • Nickel

Via Plating

For via plating, the materials include:

  • Copper

In making a choice on the type of material for plating, it is vital to consider the different procedures. This will guide your choice pondering on each of their features.

PCB Plating Procedures

There are various PCB plating choices that are convenient for use from the list below

Immersion Silver

This type of plating system deals with fabricating a slim surface to cover the copper. This means submerging the copper into an atom fluid. It helps protect the copper from corroding at the time of producing the PCB.

Carbon Ink

This is a cost effective processing option. It refers to covering of the lead over by the plate layer. The lead has high density and solidity for protection in the humid area.


This processing system utilizes electrical waves to propel a vicious circle. This reduces metallic molecules and strengthens the coating process. It can as well mean synthetic process which allows laying alloy plates as coverage for the copper. The alloy plate might be tin, gold or nickel.

Hot Air Solder Leveling

This is a process whereby the entire PCB sinks into scorching solder, and an air carver levels it off. It is likely the cheapest of the PCB plating process.


This is an energy efficient process whereby no connection is necessary between alloys. A quality PCB cache specification is necessary to sustain its durability.

PCB plating styles

PCB plating styles differs, but there are four significant types which are

Brush Plating

Brush plating is a process that deals with certain areas of target. This system of plating submerges a fractional part of the electrolyte. More so, it serves as a correctional tool for structural defects by machines.

Furthermore, this type of plating process has set an apex flexibility standard. It performs application restoration in a nominal way. Brush plating is a popular choice of plating style at electronics fabrication shops.

Finger plated plating

Finger plated plating deals with covering of the connecting strips on the PCB edge. It increases protection against corrosion and it reduces rigidity of the PCB. It is a process that uses the auto manual mechanization.

PCB Through Hole Plating

PCB through hole plating is the process of piercing the conductor foil and under layer. This permits electrical waves to move from one side of the board to another layer through via. It is a single step move application that removes the pains of many chemical therapies on the board.

Reel Linkage Selective Plating

The real linkage selective plating has similarities with the brush plating. It laminates a particular conductive foil on the board. Nonetheless, there is an overlay on an area that does not need such lamination.

Request PCB Edge Plating Quote, Pls send PCB files to Now

PCB Copper Plating

Copper plating is a process of using ion flow to deposit a layer of metallic element on a hard surface. It can also mean a measure by which a conductive metallic component covers part layers of the PCB. The conductor serves as the pathway through which electrical fragments connect to PCB.

Copper plating is a very vital procedure because

  • It delivers exceptional corrosion preservation.
  • Enhances deterioration defiance of the surface
  • It sticks to most base plates, which boost ductility of the surface byproducts.
  • Superb heat and mechanical pressure reaction on applications like the PCB

Copper serves as one of the finest electrical anode. An overlay of copper produces an outstanding electrical response to many elements. In view of this, copper plating is good for use in both the electrical as well as in the electronics industries. Copper being a pliable metal, can fix metal parts that require flexibility.

The copper layer will not shave out from the PCB panel under crook shape due to its strong sticking to the element. It provides an unvarying coverage on non-metals as well as some metals.

The copper phosphate serves as an electrolyte. When the copper wire drops into the electrolyte, it works as an anode. Also, when the iron rod for plating drops into ion fluid and connection is active, it serves as a cathode.

PCB Copper plating enhances a strong protection against corrosion from overlaying materials. Moreso as an overlay, it gives support to the core component deposits by fencing off after metal add ups. The PCB copper plating also enables greater soldering of elements and bracing.

Conductive material shields the plated sections against the spread of graphite or cements within the panel.

PCB Copper Plating Process

To achieve PCB plating, copper is taken out from the inner layer of the board. After completion of design on the inner layer, lamination of the components is next. The board becomes available for copper plating after drilling of holes and vias.

The PCB plating process starts with an electroless procedure. It is a process that does not need passage of current from one atom to another. It is a synthetic process of immersing the panel into a solvent solution with briny copper.

The tiny coppers produced, provide coverage on the outer layer and holes. It serves as the base for external power sources. It also produces an equal metal irrespective of the shape of the panel.

Electroplating, which deals with removing toppling materials on the surface, is important. The following steps are to be taken.

  • Removal of drilling adulterant and leftovers from the PCB
  • Copper fixing into the holes through micro engraving to enable firmness
  • Coverage of the board by a light sensitive material at both ends of the board to form a coating pattern
  • The photoengraving part is open to UV radiation except the wiring plating part on the board
  • Removal of the pliable thin film that covers the wiring pattern on the board

PCB Through Hole Plating

In designing PCBs, the means through which the current wave moves from one part of the board to another comes to mind. PCB through hole’ is the choice because it is about creating holes in the PCB.

Although, PCB manufacturers understand a little bit further. They see the holes in the board as element fasteners that need soldering. The holes are in different sizes to allow the fixing of electrical devices using bolts.

Plated through holes and via are synonymous and are in use by the PCB manufacturing industry. They perform the same function on distinct copper coverings. Furthermore, all holes can answer vias but not all vias can answer through holes.

PCB Through Hole Plating Classification

Through hole: The hole cuts across all surfaces of the board (top to bottom). The hole drilling process comes after the joining together of the layers. The holes become dormant routes by which current travels from one surface to another.

Blind Via

This type of via moves partly on the board starting from the outer surface. It links two or more inner surfaces to one at the outer layer. The thickness of the components determines the depth of drill.

Buried Via

This type of via is relative to the blind via. its connections are inside the internal surface without meddling with the outer layer. After bounding the layers together, physical evaluation of the holes becomes very difficult.

The blind and buried vias type of PCB hole plating permits considerable use of the outer surface. This is due to the fact that the outside design does not need routing all over via space. Nonetheless, no blind or buried vias has a double loop, thus all vias are through holes.

PCB Through Hole Plating Procedure

Plating of the PCB through hole goes along with the PCB fabrication process. The plating process includes the following:

  • Immediately the surface design is complete, drilling of through holes becomes important
  • Cleaning of holesfrom waste particles during the drilling process is next. The mixture of mordant machine like and synthetic is a perfect fit for cleaning the holes.
  • The electroless copper toppling is the next step. It means a synthetic addition process of the tiny copper which sinks into the hole and the outer surface. This offers the plating a foundation to mold from.
  • After the complete volume of copper coating is on the open surface area of the PCB as well as the via holes. The board performs the function of a capacitor after the surcharge is secure.
  • The board submerges chemicalsat different periods to enable adequate cleaning and plating.

The procedure is to dissect and affirm the balancing of the copper production. After this, the copper sticks to the outer layer and the holes, tin plating serves as etch resistance.


By now you should understand what PCB edge plating is all about. PCB edge plating offers a sort of metal barricade which passes across the height of the board. With respect to your needs, work with companies offering the best solution regarding pcb edge plating.

    GET A FREE QUOTE PCB Manufacturing & Assembly Service
    File Upload