IEC？61747-40-5:2018（E）是一种用于移动设备电子显示屏的盖玻璃的机械性能测试程序。本文件的重点是测量由于尖锐颗粒碰撞到覆盖玻璃表面而导致试样断裂所需的表面冲击能这是通过将一个球落在一片涂层研磨剂上实现的，该研磨剂放在盖玻璃上，盖玻璃由刚性支撑。故障模式与通过尖锐接触引入的损伤有关。在强化玻璃的情况下，中心张力会增强裂纹扩展。该故障模式代表在移动设备中观察到的几种现场故障模式之一。

IEC？61747-40-5:2018(E) is a mechanical performance testing procedure for cover glass used in electronic displays in mobile devices. This document focuses on the measurement of surface impact energy required to fracture a specimen due to the collision of sharp particles onto the surface of a cover glass.？This is achieved by dropping a ball on a sheet of coated abrasives placed on the cover glass, which is rigidly supported. The failure mode is associated with damage introduction via sharp contact. Crack propagation is enhanced by central tension in the case of strengthened glass. This failure mode represents one of several field failure modes observed in mobile devices.