Patent ID: 8821961

Claim:
Method for producing a magnesium oxide-based electronically insulating inorganic layer, said method comprising the following steps: (a) preparing a treatment solution of at least one hydrolysable organomagnesium compound, capable of forming a homogeneous polymer layer of magnesium oxyhydroxide by hydrolysis/condensation reaction with water; (b) depositing the treatment solution of the hydrolysable organomagnesium compound onto a surface in order to form a magnesium oxide-based layer; and (c) densifying the layer formed at a temperature of less than or equal to 1000° C. in order to obtain the magnesium oxide-based insulating layer, wherein said treatment solution optionally further comprises (i) one or more magnesium salts of formula (II): MgA 2 (II) in which A is a halide ion; and/or (ii) one or more metal or metalloid salts or organometallic compounds of general chemical formula (III): E t M u (III) in which: M is a metal or a metalloid; E is a group chosen from: a hydrolysable group; a complexing agent; a β-diketone or a derivative of β-diketone; a phosphonate; a hydroxamate of formula R 16 —CO(NHOH), in which R 16 is a linear or branched alkyl group having from 1 to 30 carbon atoms or a phenyl group; an organosilane; a sulphonate; a borate; or a diol of formula HO—R 16 —OH, in which R 16 is a linear or branched alkyl group having from 1 to 30 carbon atoms, or a phenyl group, wherein t and u, respectively, represent the stoichiometry of E and M such that the compound (III) is an electrically neutral compound; in a solvent, wherein the solvent of the treatment solution is an organic solvent selected from the group consisting of a saturated or unsaturated aliphatic alcohol of formula R 5 —OH, in which R 5 represents an alkyl group having from 1 to 30 carbon atoms, or a phenyl group; and a diol of formula HO—R 6 —OH, in which R 6 represents an alkyl group having from 1 to 30 carbon atoms, or a phenyl group.