Conformal coatings composed of acrylic, silicone and parylene polymer materials are valuable for a wide range of aerospace applications, which can push technologies to their limits. Applied to printed circuit boards (PCBs) and related electrical assemblies, conformal coatings maintain device performance through difficult operational conditions. The presence of atmospheric variation, chemicals, humidity, mobile ion permeation, moisture, temperature fluctuation, or excessive vibration can generate:Read More
Parylene Coating Blog by Diamond-MT
Used for aerospace. automotive, commercial, defense, industrial and medical applications, conformal coatings are applied in film layers generally 30-130 microns (micrometers/μm) thick, or 0.0012-0.0051 inches (“). Conformal films’ exceptional thinness is their greatest asset. Coatings safeguard printed circuit boards (PCBs) and similar electronics from performance malfunction generated by unwanted contact with:Read More
Conformal coatings are non-conductive dielectric film-coverings applied over printed circuit boards (PCBs) to protect them from damage caused by chemical incursion, corrosion, current-leakage, dirt/dust, extreme temperatures, fungus, moisture, rain, salt-spray, wind and persistent, intensive vibrations both within and external to the device. These failure mechanisms can soon lead to PCB malfunction and eventual breakdown. Rugged coatings’ exceptional performance durability and versatility protect delicate, finely-tuned components.Read More
Available in five basic material types, conformal coatings can be readily adapted as protective, insulating films for electronics. However, there can be some confusion about which type is best-suited for a specific use. Clearly defining the performance parameters for the component[s] to-be-coated helps coordinate the conformal film material with a unit’s functional requirements. Accurate assessment of environmental conditions like anticipated levels of corrosion, contact with foreign particulates, expected concentrations of moisture/salt spray, temperature fluctuations and vibrational range determine which coating type is best-suited to your electronics’ applications. Without appropriate protection, printed circuit boards (PCBs) and similar electronics will not survive harsh environments, and malfunction.Read More
Tags: acrylic conformal coating, parylene, silicone conformal coating, urethane conformal coating, rugged electronics, electronics, epoxy conformal coating, ruggedization, conformal coating selection, electronic conformal coatings
In the highly competitive conformal coatings’ industry, these providers stand out:Read More
Appropriately selected and applied, conformal coatings provide essential working protection for printed circuit boards (PCBs). However, removal of conformal coatings is necessary if the wrong coating material is selected relative to the PCB’s functional requirements, inadequately supporting its operating environment. Poor coating application can trigger failure mechanisms within the assembly, also calling for its removal and re-application.Read More
Conformal coatings made of acrylic resin (AR) are very popular, because of their distinctive beneficial properties. They protect printed circuit boards (PCBs) and similar electronics from corrosion, dirt, dust, fungus, moisture, and thermal shocks. Exceptionally user-friendly, liquid AR can be simply applied by brush, dip, or manual/robotic spray, generally resulting in the fastest turnaround-time of all conformal coatings. Ease of application and rework generates low cost for both manufacturer and client. AR’s moisture protection is also very highly rated, adding to its utility for a wide range of coating uses.Read More
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.Read More
The value of polymeric conformal coatings for protecting printed circuit boards (PCBs) from functional retardants like dust, corrosion, moisture, and temperature fluctuations has been well-documented. Conforming to the physical configurations of the exposed face of the PCB, conformal coating:Read More
Acrylic (AR) and polyurethane (UR) conformal coatings are among the best known and most commonly used conformal coating materials. As liquid coatings, both can be applied to substrates through a variety of methods:Read More
Electronics manufacturers need devices that withstand heat, cold, rain, snow, vibration, fungus, oxidation, and corrosion through decades of operation.Read More
Overall the generic name parylene describes a distinct collection of polycrystalline and linear organic coating materials with innumerable applications. The essential basis of today's parylene N, p-xylene, was inadvertently synthesized at England's University of Manchester in 1947. The filmy residue resulted after high-temperature heating of compounds of toulene and the xylenes polymerized into para-xylene. The substance immediately demonstrated an exceptional capacity for generating the fine but resilient surface-covering that characterizes today's range of parylene conformal coatings.Read More
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Parylene and acrylic conformal coatings represent two extremes of the types of compounds you can use to coat printed circuit boards, sensors, or other devices. While acrylic is popular and inexpensive, parylene offers some of the best performance of any coating compound.Read More
Conformal Coating Selection: Weighing the Pros and Cons for Your Application
Acrylic and urethane conformal coating are widely used conformal coatings. While they share the same methods of applications and ultimate end item uses, there are some differences that should be addressed prior to deciding what conformal coating is the best for your project.
Parylene and acrylic resins are both conformal coatings. Most of the similarities stop there. Because their properties vary so much, they have their own unique uses and capabilities.
Parylene conformal coating is a very robust coating, but sometimes it is not the right fit for a customer’s application for one reason or another. The entire conformal coating process is based on first identifying the standards to be used and customer’s protection desired. It would therefore only make sense that there are alternatives to parylene for different conformal coating demands.
Acrylic conformal coatings, such as MG Chemicals 419C and Humiseal 1B31 are a very popular conformal coating choice. They are used primarily for moisture protection on printed circuit boards. Often times, they are the cheapest conformal coating to apply because of their easy to use nature. As a result of this, people try to apply acrylic conformal coating as a DIY project. An issue that arises frequently is an improper thickness of coating, resulting in lackluster protection.
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:
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.
Light emitting diodes (LEDs) are a huge and growing even bigger segment of the electronics industry. LEDs are expanding into environments that demand a higher l evel of protection in order for the LED to function properly. One way to get this level of protection is by using conformal coating.
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.
Tags: acrylic conformal coating, parylene conformal coating, conformal coating, silicone conformal coating, conformal coatings, HumiSeal 1B31, urethane conformal coating, HumiSeal, epoxy conformal coating
WHAT IS CONFORMAL COATING
Conformal coating is a protective non conductive dielectric layer that is applied to protect the assembly from damage due to contamination, salt spray, moisture, fungus, dust and corrosion caused by harsh or extreme environments.
ARE THERE DIFFERENT TYPES OF CONFORMAL COATING?
There are 5 different mediums for conformal coating:
- Acrylic Resin
- Urethane Resin
- Epoxy Resin
- Urethane Resin
WHAT ARE THE BENEFITS OF EACH TYPE OF CONFORMAL COATING?
- Parylene (Type XY)
- Acrylic Resin (Type AR)
- Epoxy (Type ER)
- Polyurethane (Type UR)
- Silicone (Type SR)
Tags: acrylic conformal coating, Diamond-MT, conformal coating, conformal coating equipment, HumiSeal 1B31, conformal coating methods, conformal coating service, conformal coating removal, conformal coating rework
The Benefits of Acrylic Conformal Coating
Acrylic conformal coating offers its many benefits as your conformal coating of choice. The main benefits of acrylic conformal coating are the ease of use, physical properties, and their low costs.