Parylene Coating Blog by Diamond-MT

Nonconformity of Parylene on Wafers

Posted by Sean Horn on Fri, Jun 22, 2018 @ 07:30 AM

          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

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Tags: Parylene and MEMS, MEMS, parylene uniformity

Is Parylene Safe?

Posted by Sean Horn on Fri, Aug 12, 2016 @ 07:30 AM

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 coating, one that penetrates deep into any crevices, rivulets, or sharp edges and points that exist on the assembly’s surface.  The resultant parylene film is insulating, ultra-thin, and pinhole-free, exhibiting superior protective barrier qualities and very low moisture permeability.

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Tags: parylene, parylene deposition, parylene uniformity, medical parylene, medical device coating, parylene safety

How Long Does the Parylene Coating Process Take?

Posted by Sean Horn on Fri, Nov 20, 2015 @ 07:39 AM

Parylene Chemistry and Production Requirements

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Tags: parylene, parylene coating process, parylene uniformity

What is the uniformity of parylene conformal coating?

Posted by Sean Horn on Fri, Sep 14, 2012 @ 10:33 AM

Parylene  is often applied to substrates or materials where there is no room for any voids in the protective coating.  These materials are likely to be placed in harmful chemicals, a moisture packed environment, or even the human body.  These are often mission critical devices which can not allow any environmental factors to alter their performance.  Whenever these devices need this stringent level of protection from the elements, parylene is the only logical choice. 
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Tags: parylene, conformal coating, conformal coatings, conformal coating issues, parylene uniformity