Parylene Coating Blog by Diamond-MT

How Long Will Parylene Coating Last?

Posted by Sean Horn on Fri, May 22, 2020 @ 08:00 AM

The stability and insulation property of Parylene conformal coating is critical for the reliable operation of electronic devices throughout their lifetime (PCBs, MEMS, sensors, implants and so on.). The failure mechanism of the conformal coating layers is known to be due to pore formation, blistering, delamination and thinning or pinhole formation due to dielectric breakage of the coating over time [1], [2]. Therefore, the surface where the interface between the conformal coating and the substrate will be formed is of high importance. The cleanliness of this surface has a great impact on the final results of the conformal coating process and the coatings durability. At Diamond MT we provide professional surface cleaning services ensuring the long lasting results for your components. Also, the parylene conformal coating thickness and parylene varieties required for different service are considerations to take into account. We offer our professional services to direct our customers. Some of the variables of different service conditions can be listed as:

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Tags: parylene conformal coating, parylene coating process, parylene properties

Can I Spray Parylene Myself?

Posted by Sean Horn on Fri, Apr 17, 2020 @ 08:00 AM

The answer is “No!”

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5 Keys to Parylene Process

Posted by Sean Horn on Fri, Apr 10, 2020 @ 08:00 AM

Parylene Process:

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Why does the parylene process take so long?

Posted by Sean Horn on Fri, Mar 06, 2020 @ 01:38 PM

Parylene is a transparent polymer that offers uniform and pinhole-free conformal coatings for printed circuit boards, medical devices, and microelectronics. Varieties of parylene are made available through a modification of the molecular structure of para-xylylene (Parylene N, C, D, and F-AF4, and F-VT4). Each modification results in a set of material properties that are applicable in different service conditions.

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How do I know 100% of my product was coated with Parylene?

Posted by Sean Horn on Fri, Feb 28, 2020 @ 08:00 AM

Parylene conformal coatings are highly reliable and are highly sought after in applications such as military sensors to medical implants. Because, parylene coatings are colorless (transparent), thin (micro-scale) and uniformly deposited all over the target surface they are hardly visible to the naked eye. However, there are methods to detect or test the quality of the coatings that are designated by standards (MIL-STD, ASTM). These standards test coatings for the encapsulation properties of Parylene conformal coatings depending on where they will be used.  Leakage current and accelerated lifetime tests under different conditions (salty water, temperature, etc.)

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How to Choose Parylene Thickness: Thin vs Thick Films

Posted by Sean Horn on Fri, Jan 24, 2020 @ 08:00 AM

Implications of Parylene Coating Thickness:

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Tags: parylene, parylene coating process, parylene thickness, parylene C

Parylene Conformal Coatings for Oil & Gas Sensors

Posted by Sean Horn on Fri, Nov 22, 2019 @ 08:00 AM

Parylene is a transparent polymer offering uniform and pinhole-free conformal coatings. Different varieties of parylene (Parylene N, C, D, AF4, and F) formed by a modification in their molecular structure. Each modification results in a set of material properties that are applicable in different service conditions. The basic type of parylene derivatives is the Parylene N (poly-para-xylylene) monomer.

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Tags: parylene, parylene coating process, sensors, oil and gas

Corrosion Protection with Parylene

Posted by Sean Horn on Fri, Aug 23, 2019 @ 08:00 AM

A natural process, corrosion enacts chemical/electrochemical reactions that degrade and gradually destroy materials or components within a functional environment.  The outcome can be dangerous and costly to repair.  

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Tags: parylene, parylene coating process, parylene properties

Crevice Penetration of Parylene

Posted by Sean Horn on Fri, Oct 19, 2018 @ 07:30 AM

Parylene (XY) polymers provide robust, dielectric, micron-thin conformal coatings for a considerable range of electronic devices, most prominently printed circuit boards (PCBs).  XY’s unique chemical vapor deposition (CVD) application method synthesizes in-process, depositing gaseous parylene deep into a substrate’s surface.  CVD occurs on a molecule-by-molecule basis, conforming to all underlying contours, regardless of shape or position, to the nanometer, if necessary.  Pre-synthesized liquid coatings lack many of parylene’s performance properties, having far less ability to successfully and conformally penetrate crevices in the substrate

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Tags: parylene coating process, parylene properties, conformal coating properties

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 coating process, parylene thickness, conformal coating inspection