Parylene Coating Blog by Diamond-MT

Sean Horn

Recent Posts

Removing Conformal Coatings

Posted by Sean Horn on Fri, Feb 21, 2020 @ 12:52 PM

Conformal coatings provide a long-term, stable and reliable encapsulation method for the electronic components from the environmental effects. Different industries and service conditions calls for different protective coatings. In some cases, changes in the requirements or mistakes would call for action to remove the coating. While some coating materials are easily removed, some are virtually impossible to remove without damaging the products (eg. epoxy) . The coating removal process has been standardized by the standard IPC-7711C/7721C titled Rework, Modification and Repair of Electronic Assemblies [1]. According to the IPC-7711C/7721C coating removal starts by the identification of conformal coating (Chart. 1) type and followed by the selection of the method to be used depending on the substrate and components. If prepared onsite the coating material is generally known, but if the coating was done elsewhere the following chart can be used to identify the type of conformal coating.

Read More

Tags: conformal coating removal, conformal coating rework, parylene removal, parylene rework, conformal coating removal services, removing conformal coating

Polyurethane Conformal Coatings: When to consider an alternative

Posted by Sean Horn on Fri, Feb 07, 2020 @ 09:05 AM

Polyurethanes (Urethane Resin- UR) are polymeric, flexible, insulating, hard and chemically resistant (Acid—Alkali—Salty water) conformal coatings that are used to protect electronic parts from chemical corrosion, oil, moisture, fungus, and static discharges. Polyurethane coatings are supplied as single or two-component formulas. These coatings are suitable for printed circuit board applications such as sensors in the oil and gas industry, automotive, agriculture and common electronics. Polyurethane can be optically excited under UV-light and fluoresces therefore its inspection is also straightforward. Optically transparent coatings with a bit of tint are visually suitable for encapsulation purposes. Maximum service temperature for these conformal coatings (depending on the type) is ˂130 °C.

Read More

Tags: tin whiskers, urethane conformal coating, urethane resin, polyurethane conformal coatings

Parylene C Conformal Coating: Optical Properties, Refractive Index and Application Areas

Posted by Sean Horn on Fri, Jan 31, 2020 @ 08:00 AM

Parylene films are highly employed in different applications because they are chemically inert, transparent in the visible range of the solar spectrum, offer high dielectric strength and insulation resistance, low moisture vapor transmission and gas permeability rates [1]. They can also be deposited as void-free layers on complex geometries in deep, narrow crevices.

Read More

Tags: parylene, UV light and parylene, agricultural lighting coating

Diamond MT Melbourne, FL Facility Achieves AS9100/ISO9001 Accreditation

Posted by Sean Horn on Wed, Jan 29, 2020 @ 08:00 AM

Company meets strict requirements for aerospace and defense markets in the Southeast.

Read More

Tags: Diamond-MT, defense, parylene for aerospace, oil and gas

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:

Read More

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

Parylene for Military Sensors

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

Today, security systems rely on different types of advanced, intelligent and connected sensor technologies. Application areas are diverse: radar systems, vision, night vision (IR-cameras), acceleration- orientation-location detection (accelerometers, gyroscopes, GPS), chemicals (neural toxins, other toxic gasses, liquids, materials), wearable sensors (body temperature, relative humidity, location detection), barometric (under water), air flow (aerospace, missiles) and they are brought together for multifunctionality on PCB’s which carry many sensor at a time. Sensors used in military applications pose stringent requirements such as robustness under severe environmental conditions and require longevity of sensing functions. Some of the environmental conditions that are harsh on sensors can be listed as:

Read More

Tags: parylene, parylene conformal coating, parylene properties, military electronics, parylene for aerospace

Comparison of Parylene C, N, and F :  Similarities, differences and their application areas

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

At Diamond MT, we offer parylene coatings of different polymeric varieties (N, C, and F) as listed in the following Table. The basic parylene molecule is the Parylene N (poly-para-xylylene) monomer. Modification of the Parylene N monomer by a functional group such as Chlorine and Fluorine leads to Parylene C (poly(2-chloro-para-xylylene)) and Parylene F, respectively. The derivatization of new varieties can be done by the addition of functional groups to Paryelene N main-chain phenyl ring and its alip

Read More

Tags: parylene, parylene properties, parylene C, parylene n, parylene f

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.

Read More

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

Parylene’s Optical Properties and Performance

Posted by Sean Horn on Fri, Sep 06, 2019 @ 08:00 AM

The polymer parylene (XY) is a reliable protective conformal film that safeguards the visual clarity and color of printed circuit boards (PCBs), similar electronic assemblies and other products.  XY optical clarity seldom diminishes to the extent either the coating or the underlying substrate becomes visually indistinct, although over-exposure to ultraviolet (UV) light may eventually interfere with optical perception.  However, in the majority of cases, colorless parylene generates advantageous optical properties for a wide range of uses -- including artwork/museum artifacts, cameras/sensors, computer touchscreens, healthcare/medical devices, light-emitting diode systems (LEDs), and optoelectronic components maintaining consistent aerospace, scientific, and telecommunication operations.

Read More

Tags: parylene, parylene properties, optical performance

Parylene and Sterilization

Posted by Sean Horn on Fri, Aug 30, 2019 @ 08:00 AM

Parylene (XY -- poly(para-xylylene)) organic polymers are highly regarded through a wide range of industries – aerospace/defense, automotive, commercial, industrial, medical – for their utility as conformal coatings.  Chemically inert, colorless, linear/polycrystalline and optically clear, XY coatings provide exceptional barrier protection, dielectric reliability, and insulation for printed circuit boards (PCBs) and similar electronic assemblies whose components must maintain performance through all operating conditions.  Parylene conformal films safeguard function in the presence of biogases, biofluids, chemicals, moisture/mist, salt compounds, and temperature fluctuations. 

Read More

Tags: parylene, Medical conformal coatings, medical parylene, medical parylene uses, medical devices, bio-medical, medical device coating, sterilization