What is parylene coating used for?

Coatings of parylene are often applied to electronic circuits and other equipment as electrical insulation, moisture barriers, or protection against corrosion and chemical attack. They are also used to reduce friction, and in medicine to prevent adverse reactions to implanted devices.

Is Parylene a thermoplastic?

One of the most persistent challenges of Parylene is its limited thermal budget, a consequence of its thermoplastic nature; in atmosphere Parylene is subject to oxidation at temperatures greater than 100 °C, glass transition temperature around 90 °C and a melting temperature at 290 °C [10].

Is parylene a thermoplastic?

Is Parylene hydrophobic?

Parylene is chemically and biologically inert and stable and make excellent barrier materials. Parylene is almost completely unaffected by solvents, have low bulk permeability and are hydrophobic.

Is Parylene toxic?

Parylene infection targets the respiratory system, skin, and eyes at the ACUTE level of toxicity; skin problems can also reach CHRONIC levels if prolonged exposure is unchecked. Inhalation of dusts and contact with skin and eyes represent the most likely conduits of occupational overexposure.

Is Parylene biodegradable?

Parylene coatings derive their value from their virtual inertness to chemical attack, as well as their ability to coat complex three- dimensional form factors. 7 They are not biodegradable, and therefore find application as coatings on implantable and dental devices.

What is parylene conformal coating?

Providing a completely homogeneous coating surface, parylene (XY) conformal coatings are exceptionally corrosion-resistant, dense and pinhole-free. Among other performance advantages, ultra-thin XY protective films offer superior dielectric properties.

What is the thickness of parylene C coating?

The Parylene C coating was 0.001 in thick. The Parylene polymer penetrated and coated uniformly even in the 0.002 in gap between the wire and board.

Does parylene qualify for Class B coating specification?

In this respect, parylene qualifies for Class B specification, according to IPC-CC-830B, as a hydrolytically-stable conformal coating, requiring higher levels of moisture insulation resistance and humidity-aging testing.

How to remove parylene conformal film?

For instance, parylene conformal films can be removed by exposure to ongoing, extreme heat, although this process risks damaging components underneath. More effective removal methods are mechanically-based, requiring instruments of persistent, gentle micro abrasion for optimal results. Although effective, this method is costly and time-consuming.