2 technical articles added by Nordson MARCH
Evaluating the Effects of Plasma Treatment prior to Conformal Coating on Electronic Assemblies to Enhance Conformity of Coverage
Jun 01, 2017 | John D. Vanderford, Ann E. Paxton - Desich SMART Center, Dave Selestak - Nordson MARCH
The corrosion of Nickel-Palladium-Gold (Ni-Pd-Au) finish terminals in humid environments is known to be reduced with the application of a conformal coating such as acrylic. Corrosion has a higher rate of occurrence around the terminal ‘knee’ of a surface mount component, which may be reduced with the application of conformal coatings. Although radio frequency (RF) plasma processing is generally known to enhance conformity of conformal coating to surfaces through ionic bombardment, the effect on the functionality of assembled printed circuit boards (PCB) is not as well known.
The purpose of this study is to assess whether RF plasma processing can enhance the adhesive and coverage qualities of an acrylic conformal coating on PCBs, specifically on Ni-Pd-Au terminals with a knee, and if plasma processing has an effect on the electrical functionality of components and fully assembled PCB....
Nov 09, 2016 | Dave Selestak, Alex Berlin, and Carla Loeffler
Nordson MARCH found a solution for a manufacturer of PCBAs used in ruggedized environments. Read how plasma prior to conformal coating reduced defects and virtually eliminated coating-related failures....