| abstract |
The present invention is an electronic device in which the surface of an electronic device body 1 is covered with a protective sheet, wherein the protective sheet comprises a multilayer structure including a substrate X and a layer Y laminated on the substrate X , The layer (Y) contains a metal oxide (A), a phosphorus compound (B) and a cation (Z) having an ionic valence (F Z ) of 1 or more and 3 or less and the phosphorus compound (B) (N M ) of the metal atom (M) constituting the metal oxide (A) and the number of moles of the phosphorus atom (N P ) derived from the phosphorus compound (B) in the layer (N Z ) of the N M and the cation (Z) satisfy the relation of 0.8 ≦ N M / N P ≦ 4.5, and the relationship of F Z is 0.001 ≦ F Z × N Z / N M ≦ 0.60 Lt; / RTI > |