Greg York, Technical Sales Manager, BLT Circuit Services Ltd
Chris Palin, European Manager, HumiSeal
Leo Lambert, Vice President, Technical Director, EPTAC Corporation
Steven Adamson, Market Specialist, Nordson ASYMTEK
Comments» Use the form below to submit a comment.
Yes, thin films of fluoropolymers have been used to provide an effective anti-moisture migration and anti-corrosion barier on circuitry in several consumer electronics applications where traditional conformal coatings aren't practical. These fluoropolymers are delivered from non-flammable, non-VOC (US-EPA), low-GWP segregated hydrofluoroether solvents. The low viscosity and low surface tension of these fluids provide excellent wetting and can deliver the fluoropolymer into very tight spacings. Customer used application methods include dip, spray, precision-drop/line dispensing and brush.
Karl Manske, 3M Company
I am not aware of any die cut material that would be able to provide the moisture resistance and the insulation of solder joints and exposed conductors. There are different types of conformal coatings from acrylic to silicone and parylene. Depending on the application and requirements and cost pinch points, parylene would be my choice.
William Yager
In addition to conventional conformal coatings (usually based on acrylic, urethane or epoxy chemistries), another option has been used in some circumstances. Rather than a coating, it is a very thin layer of a fluoro-polymer, which acts as a surface modifier, rather than a barrier.
Condensed moisture does not wet to the surface, and so falls off or forms discrete beads which do not allow dendrite formation, for example.
Sunstone Circuits, has released the newest version of their design software, PCB123. Bottom line, the design process just got easier. Sunstone Circuits
Does your equipment supplier stand behind the quality and reliability of their pick & place machines with a 5-year parts / 2-year labor warranty? Learn more... Europlacer
Components encapsulated in plastic or organic compounds are susceptible to moisture damage. So are PCBs, all can cause early field failures. Control MSDs per IPC J-Std-033b.1 and 1601. Super Dry®
Use the form below to submit a comment.
Karl Manske, 3M Company
William Yager
Condensed moisture does not wet to the surface, and so falls off or forms discrete beads which do not allow dendrite formation, for example.
Peter Swanson, INTERTRONICS