May 20, 2020 · Measling is the occurrence of discrete white spots in the base laminate material of a PCB. Measling usually occurs when the resin is not properly applied to the board during the lamination process. These defects appear during the PCB production cycle and signify a malfunctioning board.

Measling is a term used to describe the occurrence of white, discreet spots in the base epoxy-glass laminate of a PCB. The inappropriate application or resin to the circuit board is a major reason for the occurrence. Why Does Measling Occur in a PCB?

Measling occurs when discrete white spots appear in the base epoxy-glass laminate of a PCB (printed circuit board), usually when the resin is not properly applied to the board during the lamination process due to the presence of moisture or other contaminants.

Jul 17, 2020 · Measling is defined as a visible inter-layer delamination of a Printed Circuit Board, appearing as lighter-colored spots (measles) on an inner PCB layer of a multi-layer PCB (usually 4-layers or more).

Jan 20, 2023 · Measling isn’t a typical concern in every circuit board; however, once they appear, they pose a substantial risk to the device’s performance. Thus, it is highly suggested to address them right away and in an appropriate method.

Measling manifests as small, white, and discrete spots or crosses under the PCB laminate surface, resembling measles. These are typically observed around the glass weave of the laminate and are indicative of micro-cracks within the resin.

Dec 3, 2024 · Measling is identifiable by the white spots in the weave interior. These components signal element destruction. While your board can tolerate minor measling, frequent measling or bridging measling connecting conductors and soldering eyes can be a significant issue.

This webinar will discuss the definition of delamination, measling and crazing, their differences and what the accept/reject criteria is according to IPC-A-600 and IPC-6012. Looking for solder training standards, manuals, kits, and more?

Measling refers to the appearance of white spots or “measles” within the fiberglass-reinforced laminate of a PCB. These spots are typically small, localized areas of delamination within the resin matrix, where the glass fibers have separated from the resin, creating voids.

Nov 29, 2024 · Measling is identified as white spots on the PCB arising from fractured glass fibers on the laminate. It is usually provoked by improper lamination or by extreme thermal impact. Measling reduces the mechanical integrity of the PCB but does not result in delamination.