Parylene Coating Blog by Diamond-MT

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 properties, conformal coating properties, parylene inpsection

Inspecting Parylene Coating

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

Parylene conformal coating (XY) provides insulative protection for complex electronic circuit assemblies expected to function through rigorous operating conditions -- potential chemical, electrical, moisture and vapor incursion during performance.   Applied through chemical vapor deposition (CVD), parylene penetrates deep within substrate surfaces, generating a level of assembly security surpassing that offered by liquid coatings such as acrylic, epoxy, silicone and urethane.  Yet, although XY is applied in a vacuum, it’s capacity to provide these extraordinary qualities does not exist in one.  Parylene’s durable protective value depends on film adhesion, a quality subject to persistent, thorough inspection throughout the production process.

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Tags: parylene coating process, parylene process, parylene inpsection

Are Parylene Noodles a Defect?

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

Unlike liquid conformal coatings joined to substrate surfaces by wet application methods, polymeric parylene (XY) uses a unique chemical vapor deposition (CVD) process to assure adherence.  There is no intermediate liquid phase.  Rather, cross-link polymerization of powdered raw XY-dimer converts the solid to a vapor at the molecular level, polymerizing XY directly as a transparent film on assembly surfaces.

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Tags: parylene properties, conformal coating defects, parylene inpsection

Best Conformal Coating for Moisture and Chemical Protection

Posted by Sean Horn on Fri, Mar 30, 2018 @ 07:35 AM

Polymeric conformal coatings safeguard printed circuit boards (PCBs) from performance malfunction caused by contact with elements within their operational environment.  Included are:

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What can be Coated: Conformal Coatings and Parylene Compared

Posted by Sean Horn on Fri, Mar 23, 2018 @ 08:02 AM

Conformal coatings are used to protect printed circuit boards (PCBs) from dust, humidity/moisture, mildew/mold, temperature extremes, and other elements whose prolonged contact might interfere with assembly function. Coatings also enhance electrical clearance-tolerance, while safeguarding PCB components from contamination (particulate or otherwise), corrosive materials, and mechanical stress.

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Tags: parylene, conformal coatings, conformal coating applications

Current Manufacturers of Parylene Machines and Conformal Coating Equipment

Posted by Sean Horn on Fri, Mar 16, 2018 @ 07:38 AM

Diamond MT is an internationally recognized provider of conformal coating services, including equipment for implementing conformal coating processes.

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Tags: dip coating equipment, conformal coating equipment, parylene equipment, parylene coating equipment

Masking Boots for Conformal Coating

Posted by Sean Horn on Fri, Mar 09, 2018 @ 07:33 AM

With proper equipment and professional expertise, liquid conformal coatings and vapor-applied parylene readily provide printed circuit boards (PCBs) and similar electronics a durable overlay of protective, insulative film; parylene’s CVD processes ensure the coating actually penetrates the substrate surface, generating further device security.

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Tags: conformal coating masking, parylene masking, masking boots

Brush Application of Conformal Coating

Posted by Sean Horn on Fri, Mar 02, 2018 @ 08:00 AM

Conformal coatings’ functional value stems from their ability to safeguard printed circuit boards (PCBs) and similar electronics from external threats to their performance. Composed of acrylic, epoxy, silicone and urethane polymer resin, coatings also provide layers of insulative protection. These liquid coatings are applied to PCBs by wet methods, primarily by brush, dipping (component immersion) or automated/manual spraying.

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Tags: conformal coating brush, conformal coating application methods, conformal coating applications

Review and Summary of Michael Osterman’s “Effectiveness of Conformal Coat to Prevent Corrosion of Terminals”

Posted by Sean Horn on Fri, Feb 23, 2018 @ 07:28 AM

Originally published in the IPC Proceedings, the article “Effectiveness of Conformal Coat to Prevent Corrosion of Terminals“ was published online by circuit insight (http://www.circuitinsight.com/programs/54223.html). Author Michael Osterman is affiliated with the Center for Advanced Life Cycle Engineering, University of Maryland (College Park, MD).

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Tags: parylene

Properties of Acrylic Conformal Coating

Posted by Sean Horn on Fri, Feb 16, 2018 @ 08:11 AM

Exceptionally user-friendly, liquid acrylic resin (AR) conformal coatings protect printed circuit boards (PCBs) and similar electronics from corrosion, dirt/dust, fungus, moisture, and thermal shocks. AR’s ease of application contributes to its status as the most frequently used conformal material.

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Tags: conformal coating properties