Protecting PCB at BGPCBA- PCB Conformal Coating Services

Conformal Coatings

Conformal coatings are thin polymeric films on pcba circuit board (PCBs). The Major functions of conformal coating are:

• It 'conforms' the film to the shape of the board.
• It covers and protects the solder joints.
• It protects the leads of electric components, exposed traces, and metalized versions from corrosion.
• It extends the working period of the PCB.

Need of Conformal Coating

There is a high chance that a new printed circuit board will perform well. However, without a conformal coating, the MT PCB Assembly can deteriorate quickly. This could be due to external factors. Conformal coating offers protection for the PCB from a wide range of environments.

• Moisture
• Salt Spray
• Chemicals
• High Temperature
• Mould Growth
• Corrosion
• Electric Failure

Conformal coatings ensure higher voltage gradients and closer track spacing. This enables the designers to miniaturize their products and make them more reliable.

 

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Conformal Coating at BGPCBA

BGPCBA, a manufacturer of Printed Circuit Assembly Boards (PCBs), offers PCB conformal coating services in its products. Depending on the product requirements, Conformal Coating is available in low, medium, and high ranges.

Industries that use Conformal Coating

PCB Assembly Conformal Coating under BGPCBA is utilized in a variety of industries. That includes:

• Automotive
• Military
• Aerospace
• Marine
• Lighting
• Industry
• Green Energy
• Domestic appliances
• Mobile electronics.

Many PCB industries use conformal coating to make their products more reliable.

 

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Conformal Coating Types

Conformal coating Circuit Boards under BGPCBA are differentiated based on their different chemical properties. Each coating type will have benefits that are suitable for the environment of which a particular PCB is part. Some expected benefits include:

• Easy processing and application
• Adjustment of viscosity
• Suiting a wide range of application methods
• Designed application and cure

Acrylic coatings

• Acrylic coatings are available at a reasonable cost.
• They provide relatively good environmental protection.
• They can retain clarity and resist darkening and hydrolysis.
• They offer relatively less solvent resistance.
• They are suitable for resistance.
• They are not ideal for appliances where chemical resistance is needed.
• They provide good flexibility and all-round protection
• Excellent humidity and salt mist protection are also features of acrylic coatings.
• Because of a property called simple solvent evaporation, they can be easily applied and removed and dry quickly.
• They operate at a significantly more comprehensive temperature range.
• They are adhesive to a wide range of substrates.

Silicone Coatings

• Silicone Coatings are considered the most resistant coatings.
• It can be applied irrespective of high/low temperatures.
• It is regarded as relatively flexible because of its ability to withstand any temperature.
• It is less resistant to humidity.
• It is less resistant to corrosive gases compared to other coating technologies.

Epoxy conformal coating

• Epoxy resin coating is available primarily as a two-part compound.
• It creates a tough coating.
• It has relatively high humidity resistance.
• It is not permeable.
• It also has very high abrasion and chemical resistance.
• It is not considered a flexible material.
• It cannot be removed once it is coated.
• It completely covers the electronic material.

Coating Process

The different types of coating process under BGPCBA involves:

• Brush Coatingis the most common practice in conformal coating under BGPCBA. It produces a smooth surface coating effect on the PCB.
• Spray Coatingis also a convenient method for conformal coating used under BGPCBA. It is mainly used for repair and small-scale production work. However, some components may not be covered by spray coating, which is a risk.
• Automatic dip coating—This method ensures the complete coverage of the product and does not cause material waste.
• Selective coating—Selective coating in BGPCBA is considered the most suitable method for mass production. It covers only the areas that are necessary.