What is Measling

By Bester PCBA

Last Updated: 2024-01-02

Table of Contents

What is Measling

Measling refers to a specific problem that can occur during the lamination process of PCB manufacturing. It is characterized by the presence of circular white spots or dots just below the surface of the laminate material. These spots are visible and often appear as several small circular areas on the PCB.

The main cause of measling is the insufficient application of resin during lamination. When there is a shortage of resin, white dots resembling measles can form on the interior of the PCB weave. Measling is different from delamination, which is another potential issue in PCBs. Delamination involves the separation of the layers of the PCB base materials, resulting in gaps or bubbles.

While measling itself may not significantly affect the functionality of the PCB, it can become problematic if the white dots bridge soldering eyes or conductors. Therefore, it is considered an undesirable issue in PCB manufacturing. To prevent measling, proper resin-application processes should be followed during lamination to ensure the integrity of the PCB.

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