Parylene Coating Blog by Diamond-MT

Parylene Coating Measurement Methods

Posted by Sean Horn on Fri, Oct 05, 2018 @ 07:30 AM

 Used as moisture and dielectric barriers, polymer parylene (p-xylylene/XY) coatings are conformal and pinhole free.  Applied by a unique chemical vapor deposition (CVD) method, parylene penetrates beneath substrate facades, simultaneously attaching above surfaces at the molecular level.  CVD generated films cover crevices, exposed internal regions, points and sharp edges uniformly, without gaps or breaches.  Compared to liquid coating materials – acrylic, epoxy, silicone and urethane -- XY film layers are micron-thin, enhancing their utility for microelectricalmechanical systems (MEMS) and nano technology (NT). 

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Tags: parylene thickness, parylene coating process, conformal coating inspection

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

Conformal Coating Quality Standards

Posted by Sean Horn on Fri, Sep 15, 2017 @ 08:18 AM

Conformal coatings differ in their material-specific performance properties as protective films for electronic assemblies. Knowing the operational characteristics of various coating-types and their functional association with assembly components supports successful film application. Issues that confound conformal coating selection and application result from potential post-application problems like:

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Tags: conformal coating specifications, conformal coating quality standards, conformal coating inspection

Conformal Coating Failure: 6 Common Causes

Posted by Sean Horn on Tue, Aug 06, 2013 @ 08:13 AM

Conformal coatings frequently play a critical role in protecting medical, electronics, defense, aerospace, LED, and automotive applications from contaminants and other potentially hazardous substances. But they're not infallible.

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Tags: conformal coating, conformal coating removal, conformal coating rework, conformal coating issues, conformal coating inspection

How to remove bubbles in conformal coating

Posted by Sean Horn on Thu, Sep 20, 2012 @ 08:39 AM

Last week, we discussed what the causes of bubbles in conformal coating are.  Now, let’s go through the various ways to remedy the bubbles.

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Tags: Diamond-MT, conformal coating, conformal coating rework, conformal coating inspection, conformal coating issues, conformal coating bubbles

What causes bubbles in conformal coating?

Posted by Sean Horn on Wed, Sep 12, 2012 @ 09:41 AM

One of the causes for failure during conformal coating inspectionare bubbles.  Bubbles are trapped pockets of air under coating.  The bubbles can cause voids in the coating and Here we will identify the six largest causes of bubbles. 


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Tags: conformal coating, conformal coating process, conformal coating inspection, conformal coating issues, conformal coating bubbles

NASA conformal coating

Posted by Sean Horn on Wed, Aug 22, 2012 @ 03:26 PM

NASA-STD 8739.1 is the Workmanship Standard for Polymeric Application on Electronic Assemblies, which describes NASA’s technical requirements, procedures, and documenting requirements for staking, conformal coating, bonding, and encapsulation of printed wiring boards and electronic assemblies.  Included are requirements which establish the responsibility for documenting, fabrication, and inspection procedures to be used for NASA work including supplier innovations, special processes, and changes in technology.  NASA-STD 8739.1 was initially released in August of 1999, with improvements and minor changes to the standard in recent years.  The current up-to-date revision is NASA-STD 8739.1A with Change 2.

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Tags: conformal coating, conformal coatings, conformal coating standards, conformal coating inspection, NASA conformal coating, NASA-STD 8739.1A