Method for manufacturing a horology component

A method for manufacturing a master pattern for a mold for a horology component, wherein the method comprises:

• manufacturing a first structure from a first photosensitive resin comprising at least one layer of photosensitive resin comprising a first pattern obtained by polymerizing the first photosensitive resin by irradiation through at least one mask, then developing the first photosensitive resin;
• and
• transforming the first structure into a second structure by structuring at least one surface of the first structure by the addition of a second photosensitive resin to the at least one surface,
• wherein the transforming comprises:
• (i) applying a layer of the second photosensitive resin on at least part of the at least one surface of the first structure;
• (ii) performing two-photon polymerization on the second photosensitive resin in order to obtain three-dimensional polymerization according to a second pattern, using a photon device which comprises an objective which is at least partially immersed in the second resin to direct and focus a beam on voxels that define a shape and/or a geometry of the second pattern;
• and
• (iii) developing in order to eliminate the non-polymerized second photosensitive resin and obtain the second structure of a form defined by the first and second patterns.