Skip to Main Contents

Nano-Film Coating

Introducing Yamaha Motor’s proprietary nano-film coating

What is Nano-Film Coating?

A World-First!*
A colorless and transparent ceramic nano-film with a heat resistance of 500 °C and up

Yamaha’s SixONy nano-film coating has been adapted for use in mass production on motorcycle exhaust pipes for the first time in the world. Sputtering deposition (a type of Physical Vapor Deposition, or PVD) provides superior levels of heat resistance, gas barrier effectiveness and insulation performance, despite the ceramic SiON (silicon oxynitride) film on the base material being only 20–80 nm thick. Expectations are high for its possible applications across a wide range of industries. The film can be produced either in a transparent form or colored form, so it can be used as a decorative coating in addition to being a protective heat-resistant coating.

*Based on Yamaha Motor research.

SixONy Nano-Film Coating


  • Heat resistant up to 700 ℃ (no oxidation after 24-hour exposure at 500 ℃)
  • Resistant against saltwater and acids
  • Excellent gas barrier effectiveness
  • Improves the hardness of the base material
  • Highly heat-resistant, colorless and transparent film (can be altered for color variations)
  • Costs less than decorative plating
  • Well-suited to manufacturing with a coating temperature of 50 ℃ or lower
SixONy Technical Papernew window

This paper in the Yamaha Motor Technical Review publication introducing our ongoing R&D efforts describes how Yamaha created the SixONy nano-film coating.

Nano-film Coating and Soap Bubblesnew window

This page on the “Seeds of Creation:Waza and Sube” website introducing Yamaha Motor’s technologies talks about the SixONy nano-film coating.

Coating Film Characteristics

Unlike Si3N4 (silicon nitride) and SiO2 (silicon oxide, glass),SiOxNy (silicon oxynitride) is composed of non-integer x and y ratios, and its dense amorphous structure provides excellent characteristics. When the film reaches the nanometer stage, it takes on characteristics different from its bulk form.

Coating Film Effect


Blocks Gas, Moisture, Chlorine and Oil

Base materials become discolored, rust or otherwise deteriorate in quality due to attacks by oxygen, nitrogen, moisture, chlorine and other such elements. Creating a barrier with dense film enables the base material (substrate) to retain its original state.

Applied Development Example

Exhaust Pipe with a Jewely-like Sparkle

Interference colors produced by SiON film:
altering the film’s thickness can produce a myriad of colors.

Film Production Process

Sputtering Deposition(PVD)

SixONy nano-film coating is produced by generating plasma in vacuum containers to produce a reaction between Si, oxygen and nitrogen. The film is produced at temperatures of 50 °C or lower, so it can be used to coat metals like aluminum, magnesium and copper, or resins such as polyethylene terephthalate (PET) and cyclo-olefin polymer (COP) film.

Related articles

Back to