Cover Glass

Protective glass for touchscreens and displays

Cover glasses for touchscreens protect the display surface from mechanical influences on the one hand, and on the other hand they offer effective protection against the glare of any light source.

It is annoying when you have produced an information source (ticket machine, operating display, etc.) for a lot of money and the display is then hardly legible. The reasons for this are usually daylight or bright light sources such as neon lights, etc.

At this point, a cover glass can prevent the failure of a device. Modern technological processes are used to create front glasses that do not dazzle or reflect - the information on the display thus remains legible.

Of course, it is also possible to use it as a safety glass or protection against vandalism. There are several ways to protect your application from environmental influences with the help of the right front glass. Especially a projected capacitive touchscreen is perfectly suited for use with a cover glass.

There are many names for protective glass: front glass, cover lens, cover glass, outer glass, front screen.

Refinement technologies

  • Mechanical processing: smoothing and profiling of edges, rounding of corners, emergency stop switch, viewing window, slot for ticket issuance.
  • Etching: Antireflection coating, image sharpness, surface robustness, finger guide
  • Printing: privacy screen, message text, label, capacitive key display
  • Coating: Anti-reflective, anti-static, electromagnetic shielding, anti-fingerprinting
  • Bending: Fitting to housing shape
  • Hardening/Pre-stressing: Vandalism protection, increase fracture resistance, color resistance (ceramic printing)
  • Laminating: Splinter protection, use of special films, increase in material strength (vandalism).

Types of glass


  • Anti-Glare Glass (AG)
    • matched to the display, prevents sparkling
    • anti-reflective surface
    • simplifies finger guidance
  • Anti-reflective glass (AR)
    • optically anti-reflective for optimal reading in sunlight
    • Anti Finger Print coating for touch applications
  • Laminated safety glass (VSG)
    • depending on IK class from wafer-thin to extremely thick
    • protects against shattering and vandalism
  • EMV- and UV-shielding glasses
    • Privacy discretion with lateral view
  • Antibacterial glass (for medical technology)


In many cases, the individual features can also be combined with each other, and customized cuts in all possible sizes are possible.

Product features

  • 100% dust-tight bonding, no gaps due to continuous circumferential adhesive bead. Protective glass/touch sensor can generally be replaced during servicing without damaging the TFT.
  • Waterproof bonding possible (e.g. protective glass can also be bonded in customer-specific housing)
  • High temperature resistance - no adhesion problems at extreme temperatures
  • Better/professional appearance than with conventional adhesive tape mounting
  • More exact positioning of the sensor/protective glass compared to adhesive tape mounting
  • No evaporation of plasticizers or corrosive gases
  • No dimensional change and thus no sealing problems with respect to the bezel when the glass is pressed strongly, since the adhesive is significantly more dimensionally stable than the double-sided foam tape
  • Small distance TFT/touch/glass, thus less parallax effects and space saving in the construction depth
  • If required, other bonding can also be carried out, e.g. glasses/sensors directly in front panels etc.

WHITEPAPER: Optical Bonding

The white paper highlights topics such as components, application areas, advantages and challenges of optical bonding and explains in detail the individual bonding processes for display and touch. (This Whitepaper is in german.)

Antibacterial glass

Especially during the winter months and in the current situation, protection against bacteria on touchscreens is essential. With the Antibacterial Glasses we have the ideal solution for medical monitors or terminals in the public sector such as ticket machines or elevator controls.

Our Antibacterial Glass makes colonization by bacteria much more difficult. In the tests carried out so far, none of the bacterial species applied on a trial basis were able to settle on the glass.


  • Coating can be applied to any type of glass (AR, AG, Clear)
  • Easy to clean
  • Extremely high transparency
  • Protection of the underlying units
  • Minimization of colonization by bacteria
  • Minimization of contamination between cleaning cycles
  • Resistant to chemical and mechanical influences, as well as UV radiation
  • Resistant to the most commonly used disinfectants based on alcohols, aldehydes, hydrogen peroxide and chlorine

Fields of application

  • Medical monitors
  • Ticket and cash machines
  • Elevator panels
  • Light switches
  • Control elements
  • Areas with special hygiene requirements, such as hospitals, laboratories, canteens, bathrooms, wellness areas, swimming pools, toilets, etc.
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