| abstract |
The present invention provides an electronic device in which the surface of an electronic device body 1 is coated with a protective sheet, the protective sheet comprising a multilayer structure including a substrate (X) and a layer (Y) laminated on the substrate (X), , layer (Y) contains a metal oxide (A), a phosphorus compound (B), and a cation (Z) having an ionic value (F Z ) of 1 or more and 3 or less, and the phosphorus compound (B) is capable of reacting with the metal oxide (A) a compound containing a portion, in the layer (Y), the molar number (N P) of phosphorus atoms derived from the molar number (N M) and the compound (B) of the metal atom (M) constituting the metal oxide (a) , 0.8≤N M /N P ≤4.5, and the number of moles (N Z ) and F Z of N M and cations (Z) is 0.001≤F Z ×N Z /N M ≤0.60 It relates to an electronic device that satisfies |