| abstract |
The present invention relates to an electronic device obtained by covering the surface of an electronic device main body 1 with a protective sheet comprising a substrate (X) and a layer (Y) laminated on the substrate (X). In a multilayer structure, the layer (Y) contains a metal oxide (A), a phosphorus compound (B) and a cation (Z) with an ion valence (F Z ) of 1 to 3, and the phosphorus compound (B) contains The compound at the site where the metal oxide (A) reacts, in the layer (Y), the number of moles (N M ) of the metal atom (M) constituting the metal oxide (A) and the phosphorus atom derived from the phosphorus compound (B) The number of moles (N P ) of N M satisfies the relationship of 0.8≤N M /N P ≤4.5, and the number of moles of N M and cations (Z) (N Z ) and F Z satisfy 0.001≤F Z ×N Z /N M ≤ 0.60 relationship. |