SCHOTT Hard & Clear coatings

Mobile device makers have adopted expensive cover glass, but those materials still suffer from reflectivity and scratches, the bane of smartphone ownership. “Hard & Clear” increases clarity and increases scratch resistance. With “Hard & Clear” reflections can be reduced by up to 80 percent1 and scratch resistance increased by up to 90 percent2 compared to an uncoated cover glass. “Hard & Clear” can be applied on various glass types3.
SCHOTT Hard Cover Solutions Process

Key benefits:

Increased Clarity1

  • Increased transmission (Anti Reflection)
  • Marginal finger prints (Easy to Clean)
  • Coating visibility close to bare glass color

Increased Scratch Resistance2

  • Increased scratch resistance
  • High abrasion durability

One for all

  • Suitable for various glass types3

Low add on costs

  • In line production using standard sputtering equipment
  • Fits into standard cover glass supply chains (plug & play)
1 Comparison of average reflections on coated (with Hard & Clear Type II Durable Anti-Reflection) vs. uncoated chemically strengthened lumino silicate glass. Measured for single air – glass interface for the wavelength 400 – 700nm (relevant wavelength for the human eye)
2 Sandpaper scratch test applied. Chemically strengthened alumino-silicate glass coated with Hard & Clear Type I (Ultra Hard) compared to traditional uncoated chemically strengthened alumino-silicate cover glass
3 Various alumino-silicate glass types tested. Coating characteristics may differ if other glass substrates used.

Product Types
SCHOTT hard coating solutions include two different product types.

Mass production capability for "Hard&Clear"

  • Fits into standard cover glass supply chains
  • Coating is done after screen printing
  • Uses an inline sputter process to achieve high machine utilization rates
  • Increased yield feasible due to
    • a coating design that enables a stable color location
    • a reduced number of coating layers
Hard Coating Supply Chain

Commercialization of "Hard&Clear"

  • SCHOTT developed a hard coating system with anti reflection for smartphones
  • SCHOTT AG is not selling or producing “Hard & Clear”
  • SCHOTT AG grants technology licenses for Hard & Clear Coating to coating specialists
  • First Chinese coating specialist is offering mass production
SCHOTT uses Cookies on this Website to enhance the user experience and provide the best possible Service. By continuing to browse the Website, you consent to our use of Cookies.