Difference between revisions of "Parylene C"

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===Characterization Processes===
 
===Characterization Processes===
I would eliminate this section  and transfer the contact angle info to relevant information
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''I would eliminate this section  and transfer the contact angle info to relevant information''
 
*[[Ellipsometry]]
 
*[[Ellipsometry]]
*[[Spectroscopic reflectometry]] this doesn't make sense in a transparent material
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*[[Spectroscopic reflectometry]] ''this doesn't make sense in a transparent material''
 
*[[Contact angle measurements]]
 
*[[Contact angle measurements]]
 
[[File:Parylene contact angle 2.png|300px|Contact angle of Water on Parylene]]<br>
 
[[File:Parylene contact angle 2.png|300px|Contact angle of Water on Parylene]]<br>

Revision as of 08:07, 9 April 2020

Parylene C repeat unit.svg

Parylene C, a chlorinated poly(para-xylylene) polymer, is widely employed as a biocompatible, corrosion-resistant coating, as a packaging material, and as an optically transparent material. Parylene conformal coatings are ultra-thin, pinhole-free polymer coatings that provide a number of high-value surface treatment properties such as excellent moisture, chemical and dielectric barrier properties, thermal and UV stability, and dry-film lubricity. These properties make Parylene coatings the ideal choice for a number of applications throughout the medical device, electronics, transportation, defense and aerospace industries.


Processing Equipment

Deposition Equipment

Etching Equipment

Similar to other polymers, parylene can be etched isotropically with an O2 plasma.

Characterization Equipment

Applications

  • Common uses of Parylene C are

Processes

Deposition Processes

Etching Processes

  • RIE Etch
    • Parylene etches are O2 based and etch photoresits at a similar rates.
    • Hard masks of Aluminum or Silicon dioxide are often used.

Characterization Processes

I would eliminate this section and transfer the contact angle info to relevant information

Contact angle of Water on Parylene
a)Schematic that shows the static contact angles b) Photograph of a water droplet on a Parylene C film.
As with other polymers, the hydrophilicity of the surface can be changed by exposing the sample to an oxygen plasma [1]

Relevant Material Information??

Below a list of useful information when considering the use of Parylene, taken from Diamond-mf.com

  • Room temperature formation means the coatings are effectively stress-free
  • Parylene is chemically and biologically inert and stable and make excellent barrier material.
  • Parylene has excellent electrical properties: low dielectric constant and loss with good high-frequency properties; good dielectric strength; and high bulk and surface resistance.
  • Parylene has good thermal endurance: Parylene C performs in air without significant loss of physical properties for 10 years at 80°C and in the absence of oxygen to temperatures in excess of 200°C.
  • Parylene is optically transparent and can be used to coat optical elements.
  • FDA approved material
  • Parylene coating has excellent mechanical properties, including high tensile strength.
  • Parylene is stable over a very wide temperature range (-200 ‘C to +200 ‘C), allowing the chamber items coated in Parylene to be put in an autoclave
  • Parylene is unaffected by solvents

Technical data

For complete information on Parylene C physical properties see: Parylene C TDS

Parylene C thin film FTIR spectrum

Parylene C thin film FTIR Spectrum from reference above.