Does Parylene Make my Product Waterproof?

Posted by Sean Horn on Fri, Aug 24, 2018

Protecting printed circuit boards (PCBs) and similar electronics from the incursion of water is an essential responsibility of parylene (XY) conformal coating.  Suitable XY permeation barriers assure no form of liquid passes through to underlying components and that the water vapor transmission rate (WVTR) is minimal.  WVTR measures the level of water vapor migration through […]

Nonconformity of Parylene on Wafers

Posted by Sean Horn on Fri, Jun 22, 2018

The polymer parylene (XY) provides exemplary, ultra-thin conformal coating for printed circuit boards (PCBs), solar cells, light emitting diodes (LEDs), medical implants, aeronautical/military equipment and numerous other products, with uniform, insulative protection in the nanometer (nm.) range.

Is Parylene Safe?

Posted by Sean Horn on Fri, Aug 12, 2016

Application of parylene’s xylylene monomer employs a chemical vapor deposition (CVD) process implemented under a vacuum.  Unlike wet coating application methods – brushing, dipping, spraying, etc. – parylene CVD is not line-of-sight.  Because the vaporous monomer envelopes all sides of the assembly being coated, appropriate process control allows vacuum deposition of an entirely conformal