Application Example Conformal Coating for PCB

Application of a Protective PCB Coating

Conformal Coating is the application of a protective coating. Opaque or transparent coatings are partially or completely applied to PCB printed circuit boards. The materials are usually highly viscous, thermal or UV-cured. They are dispensed onto a glass slide in a thick or thin layering process.


Highest Precision for the Best Sound Quality

For over 90 years Beyerdynamic has been known for its high sound quality. It goes without saying that the headphone manufacturer trusts the volumetric dispenser by preeflow. And for a good reason: Our PCB conformal coating processes are the right choice as the highest precision is required when applying the attenuation layers to the loudspeaker membrane.

Application of protective coating with preeflow spray dispenser in a conformal coating application

The damping material is applied to a surface area using a volumetric spraying unit by preeflow. This ensures a uniform conformal coating spray pattern. The membrane is neither compressed nor damaged in any way.

The result: High-precision PCB coating results for outstanding sound quality.


preeflow Conformal Coating advantages:

  • Fast processing
  • Precise spraying results
  • Conformal coating spray pattern
“The eco-Spray dispensers are ideal for dispensing low to high viscosity materials. Perfect for applying thin attenuation layers to our loudspeakers.”Sebastian Haberzettl, R&D Headphones
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Our Services

Product tests and validation by preeflow

Help with the selection of dosing components and small dosing systems

Combination of complete dosing systems or dosing equipment

Publication of all tested materials with manufacturer’s approval

Test your products and applications via video conferencing

Further products

1-component conformal coating system

1-component dispenser

The 1-component dispenser: Your perfect partner for low to high viscosity dispensing.

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2-component conformal coating machine

2-component dispenser

The 2-component dispenser: Simple and precise dispensing of previously unattained small quantities.

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Conformal coating spray system

Spray dispenser

The spray dispenser: Perfect spraying of fluids in the low to high viscosity spray range.

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We test your products!

Be there live via video conference!

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preeflow® – automated dispensing systems

More than 20 years’ experience in fluid dispensing. ViscoTec distinguishes itself with its comprehensive know-how in dispensing technology. In 2008, this wealth of experience was expanded with the introduction of the preeflow brand. With success: For more than 10 years, preeflow has stood for precise and purely volumetric dispensing of fluids in small and very small quantities. All over the world, a wide variety of industries rely on preeflow dispensing products. Always following our philosophy: Smaller, more precise, economical.