| 摘要 |
A tempered glass sheet (1,11,13,15,17) having a sufficient strength needed for a windowpane and can be utilized for smoothing a surface of the window is provided. A tempered glass sheet of the present invention, produced by tempering a glass sheet, has a stepped portion of reduced thickness (t) relative to the thickness (T) of the glass sheet in at least a part of a peripheral portion of the tempered glass sheet. By the stepped portion, a thin portion and a thick portion are formed. A difference ( tau ) in thickness between the thin portion and the thick portion is 0.5 mm or more, and the thickness of the thin portion is thicker than half the thickness of the thick portion. <IMAGE> |
