Chemically strengthened glass

A chemically tempered glass, comprising a compressive stress layer having a compressive stress in a surface layer portion and comprising a tensile stress layer having a tensile stress in an inner portion,

• wherein the chemically tempered glass has a temper filling rate Fox represented by Equation (A) of 0.75 or more and 1.00 or less:
• F
• IOX
• =
• U
• CT
• U
• CT
• ⁢
• limit
• (
• A
• )
• where
• UCT represents a tensile square area [MPa2·m] of the chemically tempered glass represented by Equation (B), and
• UCT limit represents an explosion threshold value [MPa2·m] of the chemically tempered glass represented by Equation (C);
• U
• CT
• =
• ∫
• DOC
• t
• 2
• σ
• ⁡
• (
• x
• )
• 2
• ⁢
• dx
• (
• B
• )
• U
• CT
• ⁢
• limit
• =
• 1.618
• K
• 1
• ⁢
• C
• -
• 0.121
• (
• C
• )
• where
• “t” represents a thickness [m] of the chemically tempered glass,
• DOC represents a depth of compression [m] of the compressive stress layer of the chemically tempered glass,
• “x” represents a depth [m] of the chemically tempered glass from a surface thereof,
• σ(x) represents a compressive stress value [MPa] at a depth “x” of the chemically tempered glass, and
• K1C represents a fracture toughness value [MPa·m1/2] in a composition of a thickness center portion of the chemically tempered glass.