Parylene Coating Blog by Diamond-MT

Can I Solder through Parylene?

Posted by Sean Horn on Fri, Jul 20, 2018 @ 07:30 AM

Parylene:  Properties and Processes

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Tags: parylene properties, parylene coating process, parylene rework

Will Parylene Pass a Taber Test?

Posted by Sean Horn on Fri, Jul 13, 2018 @ 07:30 AM

Taber tests are designed to measure a material’s capacity to withstand abrasion and its effects during operation.  Conformal coatings – both liquid and parylene (XY) – are

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Tags: parylene properties, parylene adhesion testing, parylene delamination, parylene disadvantages

Does Parylene Prevent Abrasion Damage?

Posted by Sean Horn on Fri, Jul 06, 2018 @ 07:30 AM

 Unlike liquid coatings – acrylic, epoxy, silicone and urethane – parylene (XY) does not use wet method application.  It can neither be brushed or sprayed onto substrate surfaces, nor will immersion – soaking the substrate in a bath of coating material – work.  In addition, XY’s:

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Tags: parylene inpsection, parylene properties, parylene

Top 5 Myths of Parylene

Posted by Sean Horn on Fri, Jun 08, 2018 @ 07:30 AM

Although parylene (XY) is a well-recognized and often used conformal coating, misconceptions about what it is and can do are common.  These mistaken beliefs interfere with true understanding of parylene’s uses.  Five of the most consistent misconceptions – and appropriate corrective information – should clear things up.

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Tags: parylene, parylene properties, parylene disadvantages

Parylene Barrier Properties

Posted by Sean Horn on Fri, Jun 01, 2018 @ 07:30 AM

Permeation barriers for electronic devices are essential to assure their ongoing performance through a wide range of operational environments.  Polymer flexible conformal coatings provide good barrier protection, protecting device substrates from unwanted incursion by solid contaminants, chemicals, gaseous permeation and liquid water or vaporous forms of moisture.  Permeability reduction improves with enhanced coating adhesion, minimizing the surface’s  

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Tags: conformal coating properties, parylene properties, parylene

Parylene Coating:  Does Thicker or Thinner Coating Provide Better Performance?

Posted by Sean Horn on Fri, May 25, 2018 @ 07:30 AM

          Parylene (XY) conformal coatings are known and recommended because of their many beneficial performance characteristics.  They provide uniform, pinhole-free protective films with excellent barrier/dielectric/insulative properties, able to conform to virtually any substrate configuration.  One property in particular – micron-thin coating layers – distinguishes XY from liquid coating materials such as acrylic (AR), epoxy (ER), silicone (SR) and urethane (UR), which need to be applied at least twice as thick in most cases and frequently more, limiting their range of uses.  Parylene typically is applied at 0.1 to 50 microns (0.004 -2 mils), while the thicknesses of liquid coatings generally range from 25 to 250 microns (1-10 mils).  Compared to liquid processes, gravity and surface tension generate negligible impact with parylene, eliminating film bridging, pinholes, puddling, run-off, sagging or thin-out during application.  XY’s coefficient of friction coefficient can be as low as 0.25 to 0.30.

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Tags: parylene thickness, conformal coating thickness, parylene properties, conformal coating properties

Conformal Coatings Thickness:  Comparing Parylene with Liquid Coatings

Posted by Sean Horn on Fri, May 18, 2018 @ 07:30 AM

          Of the five most commonly used conformal coatings, four – acrylic (AR), epoxy (ER), silicone (SR) and urethane (UR) – are classified as wet materials, meaning they are applied to substrates by three basic types of liquid-based technology:

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Tags: parylene thickness, conformal coating thickness, parylene properties, conformal coating properties

Parylene Effectiveness at Different Thicknesses

Posted by Sean Horn on Fri, May 04, 2018 @ 07:30 AM

          Each conformal coating material exhibits a range of unique performance properties that determine its product uses.  Relevant factors include the required coating-thickness necessary to assure reliable performance.  Like other coating types, parylene (XY) layer thickness is largely a function of several factors:  (1) substrate material, (2) the kind of assembly being covered, and (3) its operational purpose.  Chemically inert parylene is effective at far-thinner application thickness than liquid-applied materials for coating printed circuit boards (PCBs) and related electro assemblies: 

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Tags: parylene thickness, conformal coating thickness, parylene properties, conformal coating properties

Does Parylene Get Everywhere?

Posted by Sean Horn on Fri, Apr 27, 2018 @ 07:30 AM

After pertinent research you’ve determined parylene (XY) is the best conformal film for your coating assignment.  Especially relevant were XY’s uniform protective and insulative properties, which are useful for numerous applications, ranging from printed-circuit boards (PCBs) to medical implants to military-grade purposes.  Among parylene’s other advantages are: 

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Tags: parylene properties, conformal coating inspection, parylene inpsection

Does Parylene De-Wet?

Posted by Sean Horn on Fri, Apr 20, 2018 @ 07:30 AM

Liquid conformal polymers – resins of acrylic (AR), epoxy (ER), silicone (SR) and urethane (UR) – use wet application processes to attach to substrates.  Most prominent of these are brushing the wet coating onto an assembly, dipping (immersing) the assembly in a bath of liquid coating, or spraying the conformal film onto the designated surface.  The coating materials are wet when they are applied.  If

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Tags: parylene inpsection, parylene properties, conformal coating properties