Different Types of Parylene

Posted by Sean Horn on Fri, Oct 7, 2016

Parylene Varietals:  Matching Material to Purpose A common generic name for Poly-para-xylylene, parylene forms a protective plastic film when applied to substrate surfaces.  Application is achieved through a chemical vapor deposition (CVD) process in a vacuum, as a gas to targeted substrate surfaces.

Repairing Parylene Coated PCBs

Posted by Sean Horn on Fri, Sep 30, 2016

Parylene’s CVD method of application generates exceptionally lightweight yet durable conformal coatings, with superior barrier properties.  Compared to liquid processes, the effects of gravity and surface tension are negligible, so there is no bridging, thin-out, pinholes, puddling, run-off or sagging.

Disadvantages of Using Parylene on Electronics

Posted by Sean Horn on Fri, Sep 23, 2016

Despite parylene’s numerous benefits as a conformal coating, it has several disadvantages that should be recognized before it is used.  Failure mechanisms that can emerge from parylene coatings have limited its wider scale application in comparison to liquid conformal films such as acrylic, epoxy, silicon, and urethane.  In many situations, wet coatings can provide better […]