Cover glass considerations in Windows 8
This topic provides cover glass recommendations for multi-touch hardware solutions.
Tablet systems recommendations
For tablet systems which include Slates and Convertible Notebooks, Microsoft recommends that the cover glass application be one of the following:
A one glass solution (OGS)
A discrete cover glass application in which the glass serves as a protective display over situated on top of the touch sensing layer, but not as a physical carrier or substrate for the touch sensing layer itself.
Recommended design characteristics
The following glass cover design characteristics are highly recommended:
The cover glass should be chemically strengthened to exhibit non-frangible behavior where the glass does not energetically fragment into a large number of small pieces when impacted with sufficient penetration force.
Particular care should be made to strengthen the edge area of the glass and holes and/or slots should be used in the machined glass cover parts.
The cover glass should be scratch and smudge/fingerprint resistant.
The glass bond is sufficient to prevent pooling (ripple effects around the contact) on touch.
Latency of touch reports is reduced to have optimal Windows touch user experience.
It is important to be able to slide a finger smoothly across the glass.