WHAT IS Purple PCB ?

Printed circuit boards (PCBs) come in different colors to suit an intended application. A red or purple board will provide the leakage and testing reduction capabilities. It ensures that they are unique in contrast to the conventional boards that are usually made up of a solder mask of green color. Anyone that needs a purple PCB has to pay more to your manufacturer, though it seems the option is an attractive one.

When you are done with this article, you can be sure of having a good understanding of what purple pcb is. So let’s go on.

What are Purple PCBs?

Purple PCBs offer printed circuit boards offering a solder mask that is purple in color. This helps in referencing the color of the board. You can also expect an improvement in performance with the purple PCB instead of using those with the standard colors.

Sure, there are other colors, however the use of this has to do with the application it is intended for. Also, as a result of the non-standard color, there may be a need to place an order for your purple pcb from your manufacturer. This may cost you more since the manufacturer offers different prices for the colored PCBs.

Reasons why you should the Purple Circuit Board

The colors of the solder mask usually offer capabilities for leakage reduction for the circuit boards of high impedance while preventing some other problems. The purple PCB also allows the conduction of tests on the overall performance. Once again, this depends on the project you intend to use it for.

What is the Best Material for Your Purple PCB?

For the entire printed circuit board manufacturing process, you can make use of these materials.

Paper board: These include FR-3 (epoxy and cotton paper), FR-2 (the phenolic cotton paper), and FR-1

Special board: The special board makes use of either a metal board or a ceramic board

HDI board: The HDI board helps in boosting electric conduction as well as decreases the weight and size of the board. Also, it has a higher wiring density.

Polyimide Resin: As a result of its high resistance to heat, polyimide offers a solution for the protection of the physical state of the PCB.

Polyester Resin: This offers some protection from moisture. It also provides flexibility, as well as great electrical qualities.

Epoxy Resin: The insulation of the epoxy resin offers protection against possible harsh environments.

Composite board: These include the CEM-3 and CEM-1

Epoxy Glass Cloth: This is FR-4 and its offers water resistance, strength, as well as insulation to help in boosting the signal as well as FR-5.

What are the Different Types of Purple PCB?

It is possible to choose from different PCBs including:

  • Multilayer purple printed circuit board (PCB)
  • Double-sided purple printed circuit board (PCB)
  • Rigid purple printed circuit board (PCB)
  • Flexible purple printed circuit board (PCB)
  • Rigid-flex purple printed circuit board (PCB)
  • Single-sided purple printed circuit board (PCB)

What are the Plating Methods for the Purple PCB?

The purple PCB boards usually pass through five plating methods. Let us consider them

Through-hole plating

The substrate borehole, which is also referred to as wall activation makes use of different techniques. Particularly, the through-hole plating usually serves as an important process of fabrication during drilling.

Finger Plated Plating

This is also referred to as protruding partial plating. It deals with plating of the raw metals on the joint of the board edge and the edge of the connector. In particular, it helps in preventing abrasion, coupled with achieving a reduction in the contact resistance.

Reel linkage Plating

This reel linkage technique usually deals with the pinning of the transistors, connectors, and integrated circuits. This usually relies on the bath welding as a result of the reduced costs in contrast to the single pinning type. Usually, it is possible to achieve this automatically or manually.

Brushing Plating

Speaking in general terms, this method of plating helps in relying on the electrode positioning. This submerges some of the pieces in the electrolyte. Using the technique, it is possible to plate a particular region, and also prevent its surrounding area from being affected.

What are the Differences Between the Heavy Copper Purple PCB and the Standard Purple PCB?

There are many differences existing between the usual or standard type of the purple PCB and the heavy copper purple PCB. Let’s consider these differences.

The standard purple PCB features a small quantity of copper. This makes it thin when its at 1 oz. However, the heavy copper types feature a large quantity of copper. This helps in contributing to the thickness. In general, the amount of copper present ion the purple PCB usually falls between 2oz and 4 oz.

Furthermore, the heavy copper PCBs usually exhibit a higher conductivity in contrast to the standard purple PCB.

Also, a standard purple PCB works ideally for lightweight and simple applications. However, the applications having loads that are more intensive usually rely on the heavy copper PCB.

Furthermore, the heavy copper PCBs feature an anti-stress. This helps in boosting the performance of the board. So also, the standard purple printed circuit board doesn’t include this feature.

Also, the standard purple PCB usually relies on the copper etching and plating for the fabrication processes. The manufacturing processes of the heavy copper PCB deals with step plating and differential etching.

The heavy copper PCBs usually offer high performance as a result of their great thermal distribution. Moreover, the standard purple PCB lacks this quality.

Finally, the mechanical strength of the heavy copper PCB is higher due to the fact they have more copper in contrast to the purple PCB (printed circuit board).


Printed circuit boards (PCBs) come in different colors to suit an intended application. The Purple PCBs offer printed circuit boards offering a solder mask that is purple in color. This helps in referencing the color of the board. You can also expect an improvement in performance with the purple PCB.

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