Imagineering, Inc. | https://www.pcbnet.com/blog/everything-you-need-to-know-about-moisture-sensitive-devices-msds/
. A combination of rapid moisture expansion and mismatched materials contribute to the various types of damage induced by humidity
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/sonoscan/support/application-notes/2515-popcorn-crack
. Popcorn cracks are the result of the explosive expansion of moisture during reflow, and often originate under the die paddle and extend upward
Imagineering, Inc. | https://www.pcbnet.com/blog/pcb-industry-trends-that-matter-in-2022/
. Higher temperatures are required during the solder reflow process to create today’s printed circuit boards. Rapid moisture expansion and mismatched materials contribute greatly to this, particularly in ball grid array and chip-scale packages
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/sonoscan/support/application-notes/0434-pqfp-production-scanning
. The circular gap-type defect pattern surrounding the die is typical of a popcorn crack resulting from the sudden expansion of trapped moisture
Imagineering, Inc. | https://www.pcbnet.com/blog/what-are-lamination-voids-in-pcb-manufacturing/
. Moisture control in printed circuit board manufacturing has increasingly become a problem throughout the industry at large. Miniaturization has caused devices to become significantly smaller, increasing their overall sensitivity
Imagineering, Inc. | https://www.pcbnet.com/blog/fr-4-vs-rogers-material-for-manufacturing-rf-pcbs/
. Thus, several variables must be considered with choosing RF PCB materials: Coefficient of Thermal Expansion (CTE) To serve their purpose, RF PCBs need to be able to operate in high-temperature applications
Imagineering, Inc. | https://www.pcbnet.com/blog/causes-of-pcb-warping-how-to-prevent-it/
– when heated to extremely high temperatures, thermal expansion causes movement in the direction of that stress. PCB board layers thus need to account for this movement in a balancing act
ASCEN Technology | https://www.ascen.ltd/Blog/Solutio/
assemblies from moisture,choose selective conformal coating machine... ... ... Read more PCB depaneling machine|PCB cutting machine set up and adjustment manual This is PCB depaneling machine and PCB cutting machine set up and adjustment manual,tell you how to quickly adjust and set up the ASCEN multi panel PCB
Imagineering, Inc. | https://www.pcbnet.com/blog/material-choices-for-high-speed-flexible-circuits/
. Electrical Properties of Flexible Circuits PCB designers are familiar with the coefficient of thermal expansion (CTE) presenting problems in both flexible and non-flexible circuits
ASYMTEK Products | Nordson Electronics Solutions | https://www.nordson.com/en/divisions/efd/blog/012419-halogens-and-halides-consider-halogen-free-flux-and-solder-paste
. These materials are typically more hydrophilic, so moisture sensitivity ratings are lower. In most cases, significantly more halogen-free material is required to achieve the same level of flammability resistance
