Parylene Coating Blog by Diamond-MT

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