Chemically strengthened glass

A chemically strengthened glass having a first surface and a second surface which faces the first surface,

• wherein the first surface has a depth of compressive stress layer DOL1 (μm) which is larger by at least 3 μm than a depth of compressive stress layer DOL2 (μm) of the second surface,
• the second surface has a surface compressive stress CS2 (MPa) which is higher by at least 50 MPa than a surface compressive stress CS1 (MPa) of the first surface, and
• the chemically strengthened glass satisfies the following relational expressions (2) and (3):
• [Dh(E)−Dh(1)]<0 (2)
• [Dh(E)−Dh(2)]>0 (3)
• in which Dh(E) is a depth at which, when an edge surface of the chemically strengthened glass is examined with an EPMA, an integral of replacing-ion X-ray intensity from an outermost surface of the edge surface becomes S(E)/2, where S(E) is an integral of replacing-ion X-ray intensity from the outermost surface of the edge surface to a depth of 80 μm,
• Dh(1) is a depth at which, when the first surface of the chemically strengthened glass is examined with an EPMA, an integral of replacing-ion X-ray intensity from an outermost surface of the first surface becomes S(1)/2, where S(1) is an integral of replacing-ion X-ray intensity from the outermost surface of the first surface to a depth of 80 μm, and
• Dh(2) is a depth at which, when the second surface of the chemically strengthened glass is examined with an EPMA, an integral of replacing-ion X-ray intensity from an outermost surface of the second surface becomes S(2)/2, where S(2) is an integral of replacing-ion X-ray intensity from the outermost surface of the second surface to a depth of 80 μm.