Parylene Coating Blog by Diamond-MT

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

Epoxy Conformal Coatings

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

Selecting a suitable conformal material for coating printed circuit boards (PCBs), related electronics, or other devices requires recognition of each coating type’s unique combination of benefits and drawbacks. These must be considered in relation to a given application.

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Tags: conformal coatings, coating comparison, expoxy conformal coatings

Is Parylene a Conformal Coating?

Posted by Sean Horn on Fri, Nov 10, 2017 @ 08:06 AM

If, for some reason, you are told parylene is NOT a conformal coating, simply because it has no liquid phase of application, just walk away. And maybe have yourself a good laugh. For, as you may already know, parylene has repeatedly proven itself to be the most definitive of conformal coatings, for a variety of reasons, including:

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Tags: parylene, conformal coatings, conformal coating selection

Conformal Coating Application Methods

Posted by Sean Horn on Fri, Sep 01, 2017 @ 07:37 AM

Application methods must first reflect the targeted substrate’s susceptibility to the coating material. Liquid coatings – acrylic, epoxy, silicone and urethane – each possess specific performance properties. Optimal protection and operational efficiency depend on

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Tags: conformal coatings, conformal coating methods, conformal coating spray, conformal coating brush

Conformal Coating for PCB's

Posted by Sean Horn on Fri, Jul 21, 2017 @ 07:47 AM

Printed circuit boards (PCBs) electrically connect and power all but the simplest electronic products.  To function as designed, PCBs and their components – capacitors, resistors, etc. – require protection against operating problems caused by corrosive liquids, dust, physical shock, temperature extremes and, in the case of medical implants, bodily fluids.  Conformal coatings are applied over PCBs to safeguard mechanisms and maintain functionality.  

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Tags: acrylic conformal coating, parylene conformal coating, silicone conformal coating, conformal coatings, urethane conformal coating

All About Conformal Coatings

Posted by Sean Horn on Fri, Jun 23, 2017 @ 08:00 AM

Conformal coatings insulate printed circuit boards (PCBs) and similar electronics; their protection increases devices’ tolerance to harsh environments.  The result is undisturbed function through a range of frequently harsh operating environments and performance conditions.  Conformal coatings provide these services for aerospace/defense, automotive, consumer, and medical devices.  They are adaptable for LED uses, as well as MEMS/nanotechnology, and other uses.

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Tags: conformal coating, conformal coatings

5 Keys to the Conformal Coating Process

Posted by Sean Horn on Fri, Jun 16, 2017 @ 07:49 AM

The conformal coating process requires watchful administration to ensure successful implementation.  Recognizing the unique properties of various coating-types is critical to selecting the kind most applicable to the project and its purposes, while meeting clients’ material and operational specifications.  Regardless of the coating material and the substrate, these five fundamental procedures are essential to good conformal films.

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Tags: conformal coating, conformal coatings, conformal coating process, conformal coating methods

Managing the Conformal Coating Process

Posted by Sean Horn on Fri, Jun 09, 2017 @ 07:47 AM

Managing the conformal coating process begins with a precise definition of coverage required.  Pre-process negotiations between the client, the coating provider, and end-user, clarify coating requirements.  They include agreement about whether:

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Tags: conformal coating, conformal coatings, conformal coating process, conformal coating methods

All about the Conformal Coating Process

Posted by Sean Horn on Fri, Jun 02, 2017 @ 07:40 AM

Liquid application resins acrylic, epoxy, silicone and urethane are applied to electronic circuitry in a liquid format by brush, dip or spray techniques, either manually or through robotic processes; they require curing before they can be used. 

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Tags: conformal coating, conformal coatings, conformal coating process, conformal coating masking, conformal coating methods

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 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

NADCAP Specifications for Conformal Coatings

Posted by Sean Horn on Fri, Jul 22, 2016 @ 07:30 AM

  The National Aerospace and Defense Contractors Accreditation Program

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Tags: conformal coatings, nadcap conformal coating, conformal coating specifications

Why Conformal Coat

Posted by Sean Horn on Tue, Jul 16, 2013 @ 11:59 AM

Printed circuit boards are extremely susceptible to a wide range of contaminants that can significantly damage or ruin them in a relatively short period of time. These contaminants include moisture, dust, and harmful chemicals. In addition, electronic circuits are also susceptible to extreme temperatures and environments.

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Tags: Diamond-MT, conformal coating, conformal coatings, conformal coating process

Type AR Conformal Coating Examples

Posted by Sean Horn on Wed, Sep 26, 2012 @ 10:05 AM

Type AR (acrylic resin) conformal coatings are a popular choice for conformal coating projects because of their moisture protection, low cost, and ease of application.  There are many different varieties of type AR conformal coatings such as:

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Tags: acrylic conformal coating, conformal coating, conformal coatings, HumiSeal 1B31, MG Chemicals, type ar conformal coating

What is the uniformity of parylene conformal coating?

Posted by Sean Horn on Fri, Sep 14, 2012 @ 10:33 AM

Parylene  is often applied to substrates or materials where there is no room for any voids in the protective coating.  These materials are likely to be placed in harmful chemicals, a moisture packed environment, or even the human body.  These are often mission critical devices which can not allow any environmental factors to alter their performance.  Whenever these devices need this stringent level of protection from the elements, parylene is the only logical choice. 
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Tags: parylene, conformal coating, conformal coatings, conformal coating issues, parylene uniformity

FREE Conformal Coating Workshops and Conferences

Posted by Sean Horn on Mon, Sep 10, 2012 @ 09:40 AM

Nexus3C, the Conformal Coating Centre, have arranged a program of workshops and conferences over the next twelve months across North America, Asia and Europe for users of conformal coating.

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Tags: conformal coating, conformal coatings, Nexus3C

Type UR conformal coating examples

Posted by Sean Horn on Fri, Sep 07, 2012 @ 09:39 AM

Type UR (urethane resin) conformal coatings are a popular choice for conformal coating projects because of their resistance to chemical solvents, hardness, and moisture protection.  There are many different varieties of type UR conformal coatings such as:
  • HumiSeal 1A33
  • HumiSeal 1A20
  • Humiseal 1A27
  • Humiseal 2A64
  • HumiSeal 1A34
  • Hysol PC18M
  • CONATHANE CE-1155-35
  • CONAP CE-1170
  • CONATHANE CE-1164
  • Techspray Fine-L-Kote
  • MG Chemicals 4223
  • Electrolube PUC

You should consider using type ur conformal coating whenever your application has any issues with chemical resistivity as type ur coatings are very resistant to chemical solvents.  Type ur conformal coating is also smart to include in any tin whisker mitigation strategy, as NASA studies have shown that urethane conformal coatings are one of the few ways to successfully mitigate tin whisker growth.  Finally, applications that can see any direct mechanical wear against the coating should consider urethane conformal coatings as well.

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Tags: conformal coating, conformal coatings, urethane conformal coating, MG Chemicals, conformal coating types, HumiSeal, Humiseal 1A33, type ur conformal coating

Will HumiSeal 1B31 mitigate tin whiskers?

Posted by Sean Horn on Tue, Sep 04, 2012 @ 01:20 PM

Tin whiskers are electrically conductive, crystalline structures of tin that sometimes grow from surfaces where tin (especially electroplated tin) is used as a final finish.  They typically grow from lengths of 1-2 millimeters (mm) but have been observed to lengths in excess of 10 mm.  They are a serious issue in the electronics world because they have been known to cause short circuits between circuit elements. 

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Tags: acrylic conformal coating, conformal coating, conformal coatings, HumiSeal 1B31, tin whiskers, tin whisker mitigation, urethane conformal coating

Why use a conformal coating drying cabinet?

Posted by Sean Horn on Mon, Aug 27, 2012 @ 08:45 AM

There are a lot of different pieces of conformal coating equipment.  Each one of them has their own unique purpose and drying cabinets are no different.  The three main uses of drying cabinets are to extract air from around the assemblies, hold the assembly still during curing, and to protect the card from damage.
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Tags: conformal coating, conformal coatings, conformal coating equipment, conformal coating solvents, drying cabinet, solvents

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

Conformal Coating Rework and Repair

Posted by Sean Horn on Mon, Aug 20, 2012 @ 09:15 AM

Stripping or removal of unwanted conformal coating from a printed circuit board (PCB) can be a relatively simple process or a very messy difficult job. It does depend on several factors including the type of conformal coating you need to remove, where the coating is found and the type of components on the board.

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Tags: conformal coating, conformal coatings, conformal coating equipment, conformal coating removal, conformal coating rework, conformal coating types

Conformal Coating Standards: Meanings and Uses

Posted by Sean Horn on Tue, Aug 14, 2012 @ 07:38 AM

The Conformal Coating Standards that currently exist can be considered from two points of view. First, there are the standards that are used by the manufacturers of conformal coatings to qualify the products, whether that is done by self-certification or completed by independent testing. Second, the standards are a method for users to determine the quality of the conformal coatings they are considering to select.

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Tags: conformal coating, conformal coatings, conformal coating standards, Nexus3C

Conformal coating facility: Equipment required

Posted by Sean Horn on Mon, Aug 13, 2012 @ 09:26 AM

Last time, we discussed the general requirements necessary to open a conformal coating facility.  Now I will discuss the equipment that is required in order to have a properly operating facility.

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Tags: conformal coatings, conformal coating standards, conformal coating equipment, conformal coating process, conformal coating machines, spray booth, drying cabinet, inspection booth

Using Conformal Coating to Prevent Reverse Engineering

Posted by Sean Horn on Tue, Aug 07, 2012 @ 12:54 PM

Conformal Coatings are used regularly in an attempt to cover technology designs on printed circuit boards (PCBs). Normally, this is done by using a pigmented (coloured) conformal coating which obscures the components below the conformal coating material.

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Tags: conformal coating, conformal coatings, urethane conformal coating, conformal coating removal, Nexus3C, epoxy conformal coating, reverse engineering

Conformal Coating Facility Setup: General Requirements

Posted by Sean Horn on Mon, Aug 06, 2012 @ 12:23 PM

We get a lot of requests from customers looking to keep their conformal coating an in-house process.  A lot goes into the conformal coating process, so it may be easy to overlook allThe coating room area should be clean and dust free since printed circuit boards are especially susceptible to particles sticking to the drying coating.  The temperature range should be reasonably controlled within the sensible limits since the visocity of the coating is dependent upon the temperature.  However, a more critical point than temperature is the humidty which needs to be controlled to be above 35% for ESD reasons and <55% due to moisture issues which can affect the coating integrity and the application method.
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Tags: conformal coating, conformal coatings, conformal coating solvents, consultation

Conformal Coating Service: What to look for?

Posted by Sean Horn on Thu, Jun 28, 2012 @ 08:48 AM

After you have decided to outsource conformal coating, it is time to evaluate and decide on a vendor.  What criteria should you use to evaluate your potential vendors and how should you make a final decision?

One thing to consider is the coating house’s experience level.  Developing solid procedures and processes for conformal coating take time and experience.  Many new vendors claim to be able to apply conformal coating as well as the experienced guys, but fall short whenever they run into issues they do not have the experience to troubleshoot.  It will be tough to get referrals from your coating house, as a lot of times they are required to sign a non-disclosure agreement.  A good way to evaluate their experience level would be to ask how many years they have been in business and their typical weekly, monthly, and yearly volumes processed.  A visit to their facility, if warranted by the volume of the project, should give a good indication of the seriousness of their abilities. 

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Tags: Diamond-MT, conformal coatings, conformal coating process, conformal coating service, parylene coating service

Silicone Conformal Coating offers many benefits

Posted by Sean Horn on Mon, Jun 04, 2012 @ 01:39 PM

Silicone conformal coating is becoming an increasingly popular choice for conformal coating applications.  Because of its high temperature capabilities, moisture protection, and ease of application/rework, people are strongly considering silicone coatings for their projects.

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Tags: parylene, conformal coating, silicone conformal coating, conformal coatings, Automotive conformal coatings, conformal coating rework

Different ways to deal with solvents in conformal coatings

Posted by Sean Horn on Tue, May 29, 2012 @ 09:55 AM

Option 1: Regularly measure the solvent exposure to operators.

Solvents can be used safely.  However, the exposure of the operator to the solvent fumes must be REGULARLY measured and RECORDED. This ensures a safe operating environment and if an OSHA problem does arise in the future, evidence exists to rule out the conformal coating process as the culprit.

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Tags: conformal coating, conformal coatings, conformal coating process, conformal coating solvents, conformal coating service, safety, conformal coating safety, solvents

When Not to Use Acrylic Conformal Coating

Posted by Sean Horn on Wed, May 16, 2012 @ 07:52 AM

While acrylic conformal coating does have its many benefits, there are some applications whenever it is not the ideal conformal coating  to be using.  Typically in applications that have exposure to solvents, high temperature requirements, or require coating hardness, acrylic conformal coating should not be used.

 Solvent exposure

 In applications that have an exposure to solvents, acrylic conformal coating is not the best choice.  Acrylic conformal coating can be removed with a weaker solvent such as isopropyl alcohol or xylene.  Whenever it faces even stronger solvents, it will not offer the protection that is needed, especially if your product is a mission critical device.  Other coatings, such as urethane or parylene conformal coating have a far better resistance to solvents than acrylics.

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Tags: acrylic conformal coating, parylene conformal coating, conformal coating, silicone conformal coating, conformal coatings, HumiSeal 1B31, urethane conformal coating, HumiSeal, epoxy conformal coating

Typical Conformal Coatings Used

Posted by Sean Horn on Thu, May 10, 2012 @ 08:59 AM

Different conformal coatings have a wide range of uses throughout many different industries.  While originally founded for the electronics industry, because of the benefits of using conformal coatings, it has branched into many other fields most notably medical, automotive, and LED.

 Medical Conformal Coatings Used

 While all conformal coating types can be used for different applications, for many medical devices, parylene is the way to go.  Because parylene is biologically inert, FDA approval of parylene coated devices is well-documented. The coatings comply with USP Class VI plastics requirements and are MIL-I-46058C / IPC-CC-830B listed.  Another benefit for medical devices such as stents and catheters is that parylene is entirely conformal, meaning that component configurations with sharp edges, points, flat surfaces, crevices or exposed internal surfaces are coated uniformly without voids or pinholes.

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Tags: parylene conformal coating, parylene coating process, Diamond-MT, conformal coating, silicone conformal coating, conformal coatings, LED conformal coating, Automotive conformal coatings, Medical conformal coatings, conformal coating standards

When to Use Urethane Conformal Coating

Posted by Sean Horn on Tue, May 08, 2012 @ 06:46 AM

Urethane conformal coatings are an excellent choice to use for many conformal coatingprojects.  Because of their resistance to chemical solvents, usefulness at mitigating tin whiskers, and overall hardness, they are a very popular conformal coating choice.
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Tags: parylene conformal coating, conformal coating, conformal coatings, tin whiskers, tin whisker mitigation, urethane conformal coating, urethane resin