Crack mitigation in an optically transparent exterior of a portable electronic device

摘要

A cover glass including a center region and an outer region abutting the center region at an interface. The interface inhibits crack propagation from the outer region to the center region and vice versa. In another embodiment the cover glass may include mitigation voids introduced into the cover glass to inhibit crack propagation. The interface may be formed from the mitigation voids.

主权项

1. A cover glass of an electronic device, comprising:
a center region formed of a first material having a first index of refraction; and an outer region formed of a second material having a second index of refraction approximately equal to the first index of refraction; wherein the center region abuts the outer region at an interface; and the interface is operative to stop propagation of a crack either from the outer region to the inner region, or from the inner region to the outer region.