Parylene Coating Blog by Diamond-MT

Paralene, Paralyne, or Parylene: Correctly Spelling and Using This Superior Conformal Coating

Posted by Sean Horn on Fri, Dec 01, 2017 @ 08:01 AM

Accidentally discovered in 1947, by chemist Michael Szwarc, the polymer parylene originally bore his name, and was known for a brief period known as Szwarcite. Working to thermally decompose the solvent p-xylene at temperatures exceeding 1000 °C, Szwarc identified the monomer para-xylylene di-iodide as the only product resulting when para-xylylene was reacted with iodine.

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Tags: parylene, parylene process, parylene deposition, parylene C

Cost of Parylene Dimer

Posted by Sean Horn on Fri, Apr 07, 2017 @ 07:32 AM

Perhaps the most reliable of the conformal coatings, parylene (para-xylylene di-iodide) is also one of the more expensive coating options.  Production costs typically encompass three primary expense categories -- raw materials, labor, and lot volume.  Of the three, labor expenses are generally the most costly, but raw materials can add significantly to production overhead; materials’ costs can be largely attributed to the raw parylene dimer required to make conformal coatings.   

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Tags: parylene, parylene dimer, parylene C, parylene n, parylene af-4

Types of Parylene

Posted by Sean Horn on Fri, Mar 10, 2017 @ 07:34 AM

          Applied in a gaseous form to component surfaces through a chemical vapor deposition (CVD) process, parylene (Poly-para-xylylene) films protect printed circuit boards (PCBs) and similar electrical assemblies.  Gaseous CVD application supports efficient coating of complex component surfaces characterized by crevices, exposed internal areas, or sharp edges.  Depending on the specific use, parylene conformal coatings can be effective in the range of 0.1 - 76 microns' thickness, far finer than competing coating materials.  Equally as strong, adaptable and versatile parylene protects substrates with

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Tags: parylene, parylene C, parylene n, parylene f, parylene af-4, parylene d

Different Types of Parylene

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

Parylene Varietals:  Matching Material to Purpose

A common generic name for Poly-para-xylylene, parylene forms a protective plastic film when applied to substrate surfaces.  Application is achieved through a chemical vapor deposition (CVD) process in a vacuum, as a gas to targeted substrate surfaces.

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Tags: parylene, parylene cost, parylene C, parylene applications, parylene n, parylene f, parylene af-4

Parylene C vs Parylene F

Posted by Sean Horn on Fri, Jun 03, 2016 @ 07:30 AM

Parylene C is the most widely used parylene type for conformal coatings.  It is classified as a poly-monochoro para-xylene, produced from dimer material, with one chlorine group per repeat unit on its main-chain phenyl ring.  As a conformal coating, Type C can be deposited at room temperature via CVD.  The resulting film exhibits low chemical, moisture, and vapor permeability, making it particularly useful where protection is needed from corrosive gases.  C’s alliance of electrical and physical properties distinguish it uses from those Parylene F, a consequence of their different chemical composition; F has a fluorine atom on its benzene ring, in contrast to C’s chlorine atom. 

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Tags: parylene, parylene C, parylene f

5 Common Misconceptions of Parylene

Posted by Sean Horn on Wed, Mar 11, 2015 @ 09:11 AM

In the course of our business applying parylene to a range of different products, our clients ask many questions. They also have a few consistent misconceptions. Here are the five biggest ones -- and the facts to clear things up.

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Tags: parylene, parylene C, parylene adhesion, parylene n

Parylene C vs Parylene N

Posted by Sean Horn on Tue, Feb 17, 2015 @ 11:07 AM

Parylene and It's Uses

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Tags: parylene, parylene C, parylene n

5 Key Properties of Parylene

Posted by Sean Horn on Tue, Jan 07, 2014 @ 09:42 AM

Since its discovery in the 1940s, Parylene has skyrocketed to prominence as an ideal conformal coating choice for a range of applications. Given its unique blend of properties, it might seem like an unparalleled conformal coating option. In many ways, it is. Here are five key properties of Parylene that differentiate it from the rest.

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Tags: parylene, parylene properties, parylene C

Parylene and MEMS Technology

Posted by Sean Horn on Mon, Jun 18, 2012 @ 07:52 AM

In the past decade, the use of Parylene as a structural material in microelectromechanical systems (MEMS) devices has attracted significant attention.  Parylene C, known for its biocompatibility, is widely used in implantable medical devices.  Parylene C is also compatible with MEMS microfabrication processes.

WHAT ARE MEMS?

Microelectromechanical systems (MEMS) is the technology of very small devices; it merges at the nano-scale into nanoelectromechanical systems (NEMS) and nanotechnology.  MEMS are made up of components between 1 to 100 micrometres in size (i.e. 0.001 to 0.1 mm), and MEMS devices generally range in size from 20 micrometres (20 millionths of a metre) to a millimetre (i.e. 0.02 to 1.0 mm). They usually consist of a central unit that processes data (the microprocessor) and several components that interact with the outside such as microsensors.

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Tags: parylene, parylene conformal coating, parylene deposition, conformal coating thickness, parylene thickness, parylene C, Parylene and MEMS, MEMS

Parylene for use in Bio-Medical implantable devices

Posted by Sean Horn on Tue, Jun 12, 2012 @ 10:52 AM

Whenever implantable devices come into contact with the human body, long term protection against body fluids, enzymes, proteins, and lipids is vital.  Bio-medical surfaces typically require coating to protect from moisture, chemicals, and other potentially harmful substances.

 A downfall for wet chemistry, liquid coatings such as silicones, acrylics, epoxy, or urethanes is that they do not meet bio-compatibility requirements and cannot be applied with precise control.  On the contrary, parylene does not out-gas and is very effective against the passage of contaminants from both the body to substrate or substrate to body.

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Tags: parylene, parylene conformal coating, Medical conformal coatings, parylene C, implantable devices, medical parylene, medical parylene uses, medical devices, bio-medical