Leading the way for over 40 years
At Mer-Mar Electronics, we are committed to cater to all your PCB requirements including PCB conformal coating services. With over 40 years of expertise in fabricating and assembling high quality PCBs, Mer-Mar Electronics is the go to name for a wide variety of clients. Not without reason! Not only do we have access to the latest machines and technology, our team of experts, has a wealth of experience and is equipped with industry best practices that go a long way in ensuring improved efficiency of products.
We are extremely committed to not just fabricating quality PCBs but also keeping them well-protected with our high-quality PCB conformal coating services. Simply put, PCB conformal coating is the process of applying a protective polymer film that safeguards the components of the PCB. It is extremely important as it protects the PCB against any environmental hazards. Some of the aspects against which conformal coating is extremely effective include:
- Electrical leakage
- Exposure to moisture and other corrosive threats
- High Temperature
- Mechanical Shock and Vibration
PCB Conformal coating is a specialized job since it is important to ensure that the coating is compatible with the components, as also appropriate for the environment. It also needs to be reliable and durable so that it extends product life, besides being cost-effective.
Besides making the right choice of material it is also important that the application of the coating is done correctly so that it offers optimal protection.
Our PCB conformal coating services are designed to meet the requirements of different environments to which the PCB will be exposed. Our clientele spans a number of industry verticals and client satisfaction is the biggest measure of our success.
Rich Expertise – You can count on our rich experience and expertise to offer you the right selection of conformal coating that is optimal for the environment and is compatible with the components. Besides, the use of the right application process ensures that the efficacy of the coating is enhanced.
Wide Range of Conformal Coating – Depending on your bespoke requirements, we offer a wide range of coating to choose from. Importantly, our experts can guide you through the process so that you make the right choice that extends the product life and is cost-effective.
Suited for all volume requirements – Whether your requirement is for medium, low or high-volume coating, we have you covered. From prototype coating to coating for large production runs, we handle it all with stringent timelines.
Quick turnaround time – With early go-to-market being an important competitive advantage, we offer quick turnaround time for your conformal coating needs.
If you encounter a situation where a component needs to be replaced or where there is contamination of the assembly, conformal coating rework becomes a necessity. Equipped with the right tools and skilled manpower, we ensure that there is no damage when the old coating is stripped and the new one, applied.
Types of PCB Conformal Coating
At Mer-Mar Electronics, we have on offer a wide range of PCB conformal coating material to meet your bespoke needs. These include:
This coating is known for its:
- Capacity to dissolve in many organic solvents
- Offers great humidity resistance
- Quick drying capabiities
- Smooth finish
- Conforming to Mil-I-46058C and IPC-CC-830 standard specifications.
A polymer based compound, the importance of this coating lies in:
- Its ability to penetrate narrow spaces
- Thermal endurance properties
- Adherence to USP Class VI Plastics requirements and NBC requirements in AR70 / AFR80-38 / Navinst 3400.2.
The importance of this coating lies in:
- Enhanced chemical resistance
- Dielectric properties
- It is Mil-I-46058C and IPC-CC-830 approved.
- Strong adhesive properties
- High resistance to humidity
This coating is known for its:
- Chemical resistance
- Resistance to humidity
- Ability to form a rigid coating
A soft, flexible coating, this is known for:
- Corrosion resistance
- Chemical resistance
- Suited for high impedance circuitry
- Thermal resistance
- UV resistance
- Humidity resistance
- Light transmission properties
- Conforming to MIL-I-46058C and IPC-CC-830 standards.
Besides ensuring that we use the right coating material and employ the right process, the checklist we run through to provide the best results include:
- The coating is applied to a clean surface.
- It is compatible with the components.
- It works well for the environment.
- It is reliable, cost-effective.
- It is compliant to the industry standards.
As much as the choice of the right coating is important in ensuring the PCB is aqequately protected, what is also important is the coating application process. The best conformal coating if applied poorly provides inadequate levels of protection. What is important to ensure are the following aspects:
- The thickness of coating and its uniformity.
- How well the coating bonds with the board.
- The extent of coverage.
This is possible once the right conformal coating process is used. Our conformal coating process includes the following steps:
Cleaning of printed circuit board assemblies is imperative to ensure that the coating of choice bonds well with the substrate and that all contaminants that can impact adhesion as well as the look of the final coating, are removed. It is also ensured that any active solder residues are eradicated.
Reliable masking is required for a conformal coating to be truly effective. Poor masking can result in assembly operating failures on account of coating contamination.
Post the surface cleanliness and masking, we ensure that the right conformal coating method is selected from among the following options:
Curing methods include air drying which is highly in vogue for acrylic coatings. Oftentimes heat can also be applied- usually between 80°C to 110°C- to ensure efficiency. UV coating material often only requires regular sunlight. However, some coatings could require addition of heat as well as a rise in humidity.
Detailed inspection is the final and crucial process. Inspection is carried out under normal light and normal magnification, however depending on the kind of coating, it is also undertaken under increased magnification as also under UV.
Conformal coating removal
Replacement of a component or contamination of assembly can necessitate conforming coating removal. The right tools and skill and precision are needed to do this so that the assembly or its components are not damaged.
While conformal coating finds a wide range of application, given its ability to protect PCBs in harsh environments, its usage is particularly wide spread in the following industries:
- Industrial and green energy applications
- Mobile electronics industry