What Is the Effect of Negative Conformal Layers on PCBAs?
Conformal Coating is an inevitable part of the PCBA process.In this article, we will detail the impact of negative conformal layer on PCBA.

Table of Content
PCBA is not complete without a
conformal finish. The demand for Conformal Coating is increasing as the quality of PCBA products on the
market continues to improve. It is therefore vital to choose high-quality Conformal Coating. Poor
Conformal Layers can have a lot of negative effects on PCBA. We will then discuss the impact of poor
Conformal Layers on PCBA.
1. Reduced Electrical Conductivity
If the paint used in the manufacture of PCBA is poor, it will definitely reduce the electrical
conductivity. The Conformal Coating may contain ions such as potassium and sodium ions that will affect
the PCBA circuit. A poor Conformal Covering can also damage the PCBA metal lines, causing circuit
interference and short circuits.
2. Poor Rust Resistance
Conformal Finish’s main purpose is to protect PCBA against moisture, deterioration and other
problems. The rust resistance is worse for a negative anticorrosion coating than it is for a good
anticorrosion coating, so PCBA can easily be corroded. The steel wiring of the equipment will be damaged
if the PCBA corrodes.
3. Heat Dissipation Is Affected
PCBA manufacturers need to dissipate
a lot of heat generated at the workplace. Otherwise, the circuit will be damaged and the tool’s
safety compromised. The best conformal layer has excellent warmth dissipation properties, which will
help PCBA better heat dissipation. The negative conformal coating will affect PCBA’s heat
dissipation, leading to high circuit temperatures, and therefore, disrupting the normal operation of the
tool.
In the general, conformal finishing will bring about a lot of negative effects to the
PCBA area, affecting the normal operation of the equipment. It is therefore very important to choose a
high-quality conformal finish that can ensure the quality and safety of PCBA.
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