Parylene Coating Blog by Diamond-MT

Sean Horn

Recent Posts

How Potting Protects Against Reverse Engineering

Posted by Sean Horn on Fri, Mar 24, 2017 @ 07:37 AM

Conformal coating and potting are the most common methods of protecting printed circuit boards (PCBs) and cable connections destined for use in:

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Tags: potting, potting compound, reverse engineering

Parylene and Arathane 5750:  Low Outgassing Conformal Coatings

Posted by Sean Horn on Fri, Mar 17, 2017 @ 07:35 AM

Outgassing occurs when previously adsorbed or occluded gases or water vapor are released from some material.  With respect to protective conformal coatings, outgassing encompasses the discharge of gases previously confined within a high-frequency printed circuit board (PCB) or similar assembly material, often resulting in functional difficulties. 

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Tags: parylene, NASA conformal coating, NASA-STD 8739.1A, arathane 5750

Types of Parylene

Posted by Sean Horn on Fri, Mar 10, 2017 @ 07:34 AM

          Applied in a gaseous form to component surfaces through a chemical vapor deposition (CVD) process, parylene (Poly-para-xylylene) films protect printed circuit boards (PCBs) and similar electrical assemblies.  Gaseous CVD application supports efficient coating of complex component surfaces characterized by crevices, exposed internal areas, or sharp edges.  Depending on the specific use, parylene conformal coatings can be effective in the range of 0.1 - 76 microns' thickness, far finer than competing coating materials.  Equally as strong, adaptable and versatile parylene protects substrates with

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Tags: parylene, parylene C, parylene n, parylene f, parylene af-4, parylene d

What Solvent Breaks Down Parylene?

Posted by Sean Horn on Fri, Mar 03, 2017 @ 07:21 AM

While parylene provides a reliable, versatile conformal coating, it can require removal.  When circumstances necessitate removal of liquid coatings – acrylic, epoxy, silicone or urethane – a wide range of chemical solvents can be used to detach the film from the underlying substrate.  No single chemical material/process is equally successful for all uses, but solvent processes are employed most frequently because they do the least damage to printed circuit boards (PCBs) and their components.  Such is not the case with parylene. 

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Tags: parylene, conformal coating solvents, solvents, parylene safety

Nano Coating vs Parylene

Posted by Sean Horn on Fri, Feb 24, 2017 @ 08:00 AM

Although its basic component is remarkably small – with 25,400,000 nanometers included in just one inch(!!) -- nanotechnology encompasses a growing, interdisciplinary field with an unlimited future.  Nanowires and nanotubes are used in transistors for printed circuit boards (PCBs) and associated electronic assemblies.  Bio-nanobatteries, capacitators, LCDs, and microprocessors represent just a few nano-applications, which include uses for aerospace, agricultural, automotive, consumer, industrial, medical, military and oceanic products. 

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Tags: parylene, parylene properties, conformal coating, parylene disadvantages, nano coating

Conformal Coating Removal Standards

Posted by Sean Horn on Fri, Feb 17, 2017 @ 08:00 AM

If problems in a conformal coating defy reliable repair, coating removal may be the only solution.  Removing conformal coating from PCBs requires matching removal methodology with coating type and the component’s function.  A variety of factors – bubbles/voids, coating thickness, component failure, inadequate masking, poor adhesion, surface finish, among many others – can necessitate coating removal.     

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Tags: conformal coating removal, conformal coating rework, conformal coating issues, conformal coating defects, conformal coating removal services

Cracking in Conformal Coating:  Major Causes and Preventative Strategies

Posted by Sean Horn on Fri, Feb 10, 2017 @ 07:45 AM

Conformal coatings protect printed circuit boards (PCBs) and similar electronic assemblies used for a wide range of aerospace, automotive, consumer, defense and medical applications.  Coatings effectively cover PCBs, shielding them from contaminants, liquid incursions, temperature fluctuations and other conditions potentially hazardous to component performance.  However, problems can develop if their preparation, application, and drying processes are inappropriately managed. 

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Tags: conformal coating, conformal coating process, conformal coating rework, conformal coating issues, conformal coating defects

Nano Coating and Conformal Coating:  A Functional Comparison

Posted by Sean Horn on Fri, Feb 03, 2017 @ 07:37 AM

The engineering of functional systems at the molecular scale, nanotechnology encompasses management of individual atoms, combined into effective working units, often complex as machines.   Yielding advantages like enhanced chemical reactivity and strength than larger-scale structures, they offer greater control of the light spectrum and weigh significantly less.  Incredibly small, one nanometer is a billionth of a meter (10-9 of a meter) -- one inch equals 25,400,000 nanometers; more illustratively, a sheet of newspaper is 100,000 nanometers thick.  

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Tags: parylene, conformal coating, nano coating

Conformal Coating Boots vs Tape:  Making the Right Choice

Posted by Sean Horn on Fri, Jan 27, 2017 @ 07:24 AM

Masking tapes and boots both protect components for a selected range of masking functions.  Choosing between the two is crucial to achieving optimal masking protection.  Conductivity needs to be maintained in all cases.  In addition, such operational factors as the:

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Tags: conformal coating, conformal coatings, conformal coating masking, masking boots

Conformal Coating Masking Boots

Posted by Sean Horn on Fri, Jan 20, 2017 @ 07:29 AM

Conformal Coating Masking Boots

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Tags: conformal coating, conformal coating masking, masking boots