Parylene Coating Blog by Diamond-MT

Paralene, Paralyne, or Parylene: Correctly Spelling and Using This Superior Conformal Coating

Posted by Sean Horn on Fri, Dec 01, 2017 @ 08:01 AM

Accidentally discovered in 1947, by chemist Michael Szwarc, the polymer parylene originally bore his name, and was known for a brief period known as Szwarcite. Working to thermally decompose the solvent p-xylene at temperatures exceeding 1000 °C, Szwarc identified the monomer para-xylylene di-iodide as the only product resulting when para-xylylene was reacted with iodine.

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Tags: parylene, parylene process, parylene deposition, parylene C

The Importance of Cleanliness Testing

Posted by Sean Horn on Fri, Jul 07, 2017 @ 07:23 AM

The Need for Cleanliness Testing                                          

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Tags: parylene process, conformal coating process, cleaning, cleanliness testing

Solvent Use in Parylene Deposition

Posted by Sean Horn on Fri, May 26, 2017 @ 07:32 AM

For various reasons, even people familiar with the variety of existing conformal coatings, their strengths, weaknesses and respective use often assume that the chemical vapor deposition (CVD) process used for parylene films incorporates a solvent, as an integral component of the procedure.  This is false, for the reasons detailed below.

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Tags: parylene, parylene process, conformal coating solvents, solvents

Batch Size Considerations for Parylene Production

Posted by Sean Horn on Fri, Apr 14, 2017 @ 07:35 AM

The parylenes consist of a range of para-xylylene polymers whose desirable physical and electrical properties support expansive utilization as conformal coatings for electronic and medical devices  Parylene films are applied to substrates via a chemical vapor deposition (CVD) process, which deposits monomeric parylene vapor homogeneously and deeply into the surface of printed circuit boards (PCBs) and related assemblies/components. 

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Tags: parylene, parylene process, parylene deposition, parylene disadvantages

How to Estimate Parylene Coating Costs

Posted by Sean Horn on Fri, Jul 29, 2016 @ 07:30 AM

Often considered the ultimate conformal coating, Parylene is well suited to protect many types of products and devices.

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Tags: parylene, parylene cost, parylene process, parylene price

Common Parylene Problems

Posted by Sean Horn on Fri, Jul 15, 2016 @ 07:30 AM

In addition to cracking, a range of associated issues may interfere with successful coating of parylene films.  Because it is applied via CVD, parylene generates a structurally continuous film covering a PCB or similar assembly.  In CVD, the interaction of vapor-phase chemical reactants formulate a non-volatile solid film on a substrate, useful for a variety of applications like corrosion resistance, erosion defense, and high temperature protection. 

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Tags: parylene, parylene process, parylene rework, parylene disadvantages, parylene issues

What Is the Price of Parylene Conformal Coating?

Posted by Sean Horn on Fri, Jul 08, 2016 @ 07:30 AM

Parylene is often considered the ultimate conformal coating for the protection of devices, components, and surfaces in the electronics, instrumentation, aerospace, medical, and engineering industries.

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Tags: parylene, parylene cost, parylene process, parylene dimer, parylene price

Does Parylene Adhere Chemically?

Posted by Sean Horn on Fri, Apr 01, 2016 @ 08:10 AM

            Parylene only adheres to substrates mechanically, and this can require assistance from additive substances; parylene’s chemically-based adherence is nonexistent.  Adhesion is a consequence of molecular attraction stimulating the surface unification of two dissimilar substances; their joining creates a significant physical bond between them.  Of the two primary types of adhesion, chemical adhesion results when a compound joins with another, because they share sufficient mutual chemical interaction to form a bond with each other.  Because parylene is chemically inert, chemical adhesion is impossible; it adheres using the other method -- mechanical adhesion.  Applied mechanical processes can stimulate this binding force between surface molecules.   

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Tags: parylene, parylene process, parylene adhesion

Mastering the Parylene Coating Process

Posted by Sean Horn on Fri, Sep 04, 2015 @ 08:00 AM

Parylene Deposition  

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Tags: parylene, parylene process, parylene deposition

Parylene Masking Revealed

Posted by Sean Horn on Wed, Aug 14, 2013 @ 09:07 AM

Whether the application is a medical device, a printed circuit board (PCB), or a light-emitting diode (LED), a parylene conformal coating is typically applied to protect the product. Sometimes, however, the product actually has to be protected from the parylene conformal coating—or at least parts of it do. 

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Tags: parylene, parylene conformal coating, parylene process, parylene deposition, parylene masking