Old Coatings

Moisture, salt, chemical, corrosion resistant coating

This is the broadest category of barrier/protective films. Virtually all chemistries and deposition platforms are represented here and applications include industrial, optical, biomedical, consumer electronics, pcb, aviation/aerospace, defense, semiconductor, LED, automotive and marine.

  • Parylene
  • ALD (atomic layer deposition, AlOx, TiOx)
  • LT-4, LT-8 – specialty fluoropolymer
  • Liquid conformal films (urethane, epoxy, acrylic)
  • Powder coatings
  • Nano-chemistries (hydrocarbons and surface treatments)
  • SiOx

Hard, anti-abrasion coating

Hard coatings are designed to be wear resistant. Some are also dry-film lubricants and utilized in industrial applications including gears, bearings, spindles, etc.

Liquid conformal coatings

Tungsten disulfide

Fluoropolymers/Powder coating

  • Xylan
  • Halar
  • Nylon

Medical coatings (implants, blades, needles, catheters, wires, etc.)

Coatings used in the medical arena are also very broad and include a such diverse products/applications as implants (stents, coils, wires), orthopedic surgical instrumentation, hearing aids, catheters, guide wires, endoscopy/laparoscopy, diagnostics/sensors, medical plastics.

Fluoropolymers (LT-4, LT-8)

Parylene C and N


Fluoropolymer (Halar)

Hydrophobic coating

Coatings that display a low surface energy, most with contact angles (in water) of 90° and above, have the ability to repel liquids (ingress contamination) and prevent failure. Super hydrophobic films are those with contact angles of 160° and more. Hydrophobic materials are typically non-polar and attracted to other chemically neutral molecules and non-polar solvents. The effect here is the creation of water droplets that form tight uniform beads that cluster to form micelles. This low attraction to liquids, especially water, is used commercially to prevent water ingress on printed circuit boards and other electronic parts or assemblies, resulting in added protection and extended life. This property is useful in the efficient separation of water from fuel, oil and other materials.

There are several coatings classified as hydrophobic. Most of these fall under the classification of fluorocarbon chemistries. These are deposited through various delivery platforms, from spray or dip, CVD, PVD or plasma systems. Many require a thermal cure with temperatures in excess of 700°F.

Thin Film Partners introduces low temperature solutions – LT-4 and LT-8 fluoropolymer. These two products:

  • Have a contact angle of 115° in water
  • Are easy to apply
  • Require very little in the way of expensive deposition platforms
  • Have excellent moisture, salt and chemical resistance
  • Demonstrate excellent re-workability
  • Can be soldered-through
  • Are optically clear, but can be fitted with “markers” to confirm coating
  • Are a high-performance, lower-cost alternative solution


Hydrophilic coating


Some require increased wettability in order to properly function. Hydrophilic surface coatings make polymeric devices susceptible to fluids by grafting polymers that help to bind water onto the material. Hydrophilic surface coatings can be either permanently or transientlyhydrophilic, depending on the permanence needed for different materials, as well as able to conduct fluids over or through the material according to the substrate properties.

The following are hydrophilic coatings:

  • Plasma modified polymer surfaces
  • Conversion coated metal surfaces
  • Coating films containing Pyrrolidine
  • Coatings containing Hyaluronic acid (HLA)

Dry-film lubricants

Dry film lubricantsare coatings materials which, in solid phase, are able to reduce friction between hard surfaces

The main dry lubricants aregraphite, tungsten and molybdenum disulfide (WS2 and MoS2.) They offer lubrication at temperatures higher than typical liquid and oil-based lubricants. The low-friction characteristics attributed to dry film lubricants are a function of a layered structure at the molecular level with weak bonding between layers. These layers can then slide relative to each other with minimal applied force, giving them their low friction properties.


· Dry lubricants are often used in applications such as mechanical bearings. Gears, CV joints.

· Can operate up to 350 °C (662 °F) in oxidizing environments…higher in reducing / non-oxidizing environments (molybdenum disulfide up to 1100°C, 2012°F).


Non-stick coatings (mold release coating)


“See hydrophobic coatings” (Link to it)

Particle coating

A coating or film applied at the micro or Nano-scale level. Provisioned primarily via ALD (atomic layer deposition) and CVD (chemical vapor deposition), the coating chemistries are limited to those that can accommodate sub-micron thickness.

With CVD process, one coating is parylene. The limitation is typically the problems associated with tumble process and clumping. Aspect ratio of parylene is usually sufficient for most applications. Parylene film is usually 0.50 um and greater.

With the ALD delivery platform, the choice of coating is more extensive and includes: oxides, nitrides, sulfides and some metals. The aspect ratio can be 5,000:1 or more. The coating is measured in angstroms and does not require tumble processing to achieve a consistently uniform layer.

Autoclave resistant coatings

Several customized options exist, including laminates . Please call for information.

Drug-eluting films.

Thin Film Partners are able to coat stents (coronary and peripheral) and balloon catheters. See “drug eluting coatings”