Formation of a three-dimensional object on a dial

A deposition method for the formation of an object for a watch;

• the object including a perimeter, at least one first surface and/or a volume;
• the deposition method comprising at least one step of:
• supplying at least one support comprising at least one receiving surface;
• depositing an adhesion layer on the at least one receiving surface, said adhesion layer being formed of one or more layers made of at least one material selected from among Au, Cu, Ag, In, Pt, Pd, Ni, Ti, Ta, Cr, Th or an alloy of these materials, so as to render said at least one receiving surface electrically conducting;
• delimiting an outline on the deposited adhesion layer;
• the outline corresponding to the perimeter, to the at least one first surface and/or to the volume of the object;
• forming a cavity along the outline by depositing, on the adhesion layer, a plurality of polymer layers, such that a portion of the adhesion layer equivalent to the perimeter, to the at least one first surface and/or to the volume of the object is opposite, preferably free, and is not covered by polymer layers;
• filling the cavity by depositing on the opposite, preferably free, portion of the adhesion layer at least one finishing layer comprising at least one material selected from Au, Cu, Ag, In, Pt, Pd, Ni, Ti, Ta, Cr, Th or an alloy of these materials;
• and,
• carrying out a surface treatment on the plurality of polymer layers and the deposited adhesion layer so as to expose the at least one receiving surface of the support
• wherein the deposition of the plurality of polymer layers is made by additive manufacturing.