Diamond-MT's Blog

Repairing Parylene Coated PCBs

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

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.

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Tags: parylene, parylene removal, parylene rework

Disadvantages of Using Parylene on Electronics

Posted by Sean Horn on Fri, Sep 23, 2016 @ 07:30 AM

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 performance and lower cost (or both) for many applications

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Tags: parylene, parylene properties, parylene removal, parylene disadvantages, parylene issues

Safely Removing Parylene Coatings

Posted by Sean Horn on Fri, Sep 16, 2016 @ 07:30 AM

Despite conformal coatings’ ability to dependably protect substrate surfaces of printed circuit boards (PCBs) and related electrical components, problems can sometimes occur which compel their removal.  Chemical removal, which does the least damage to PCBs, is fine for wet coating substances like acrylic, epoxy, silicon and urethane.   Chemical removal methods are far less successful for parylene, despite the use of a chemical vapor deposition (CVD) process for its film application. 

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Tags: parylene, parylene removal, parylene rework

The Cost of Parylene Coating vs. Other Conformal Coatings

Posted by Sean Horn on Fri, Sep 09, 2016 @ 07:30 AM

Due to its excellent ability to stop the passage of gases, liquids, or radiation onto circuit board components, parylene is often considered to be the ultimate conformal coating for the protection of devices, components, and surfaces in many industries.

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Tags: parylene, parylene cost, conformal coating costs, parylene costs

Conformal Coating Specifications:  Guidelines for Design, Selection and Application of Conformal Coatings

Posted by Sean Horn on Fri, Sep 02, 2016 @ 07:30 AM

Understanding the characteristics of various conformal coating types, and their interactions with the extreme range of products and materials to which they are applied, ensures optimal function, performance reliability and product-life.   Designers and users of conformal coatings should be aware of the properties of various types of conformal coatings and their interactions with the parts/materials they cover, to protect the products in their respective end-use environments for the expected design-life of each component.  

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Tags: conformal coating, conformal coatings, conformal coating specifications

Ruggedizing COTS Electronics with Parylene

Posted by Sean Horn on Fri, Aug 26, 2016 @ 07:30 AM

Parylene Coatings and COTS Electronics

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Tags: parylene, rugged electronics, COTS, ruggedization

How to Measure Conformal Coating Thickness

Posted by Sean Horn on Fri, Aug 19, 2016 @ 07:30 AM

Methods for Measuring Conformal Coating Thickness

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Tags: conformal coating, conformal coating thickness, conformal coating specifications

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

Five Common Causes of Parylene Failure

Posted by Sean Horn on Fri, Aug 05, 2016 @ 08:00 AM

Parylene Conformal Coatings

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Tags: parylene, parylene adhesion, parylene disadvantages, medical device coating, parylene delamination, parylene issues

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