NOVELTY - Tempered glass has a compressive-stress layer on the surface, and the surface or an end surface is etched after strengthening. The glass comprises (in mol%) silica (45-75), alumina (3-15), boria (0-12), lithia (0-12), sodium oxide (0.3-20), potassium oxide (0-10), magnesium oxide and calcium oxide (1-15, in total), and phosphorus pentoxide (0-10). The molar ratio of total content of alumina, sodium oxide, and phosphorus pentoxide with respect to silica content is 0.1-1. The molar ratio of sodium oxide and alumina is 0.1-5.    USE - Tempered glass is used for touch-panel displays, cover glass of mobile telephones, cover glass of solar cells, protection components of displays (all claimed), and tablet personal computers. Can also be used for substrates of digital cameras and personal digital assistants, window glasses, substrates of magnetic disks, substrates of flat panel displays, cover glass of solid-state image sensors, and tableware.    ADVANTAGE - The tempered glass has appropriate etching performance, and excellent surface quality, end surface quality, ion-exchange performance, and mechanical strength. Since the density is low, the tempered glass provides lightweight tablet personal computers, and high-definition patterning is enabled as strain point is high.    DETAILED DESCRIPTION - Tempered glass has a compressive-stress layer on the surface, and the surface or an end surface is etched after strengthening. The glass comprises (in mol%) silica (45-75), alumina (3-15), boria (0-12), lithia (0-12), sodium oxide (0.3-20), potassium oxide (0-10), magnesium oxide and calcium oxide (1-15, in total), and phosphorus pentoxide (0-10). The molar ratio of total content of alumina, sodium oxide, and phosphorus pentoxide with respect to silica content is 0.1-1. The molar ratio of total content of boria and sodium oxide with respect to silica content is 0.1-1. The molar ratio of phosphorus pentoxide and silica is 0-1. The molar ratio of alumina and silica is 0.01-1. The molar ratio of sodium oxide and alumina is 0.1-5. An INDEPENDENT CLAIM is included for manufacture of tempered glass.