Manufacturing method for mechanical resonators

A method for manufacturing a set of mechanical resonators having structural characteristics with an average value comprised within a predetermined range of values, said structural characteristic being common to each resonator in said set, the method comprising the following steps:

• a) forming in said plate mechanical resonators with dimensions different from the dimensions necessary to obtain the set of mechanical resonators having structural characteristics comprised within said predetermined range of values;
• b) forming in said plate at least one oscillating member in an opening made in the plate, said member consisting of a trunk with a body joined at a first end to a securing part of a wall in this opening, and of two flexible arms joined at a second end of said trunk by a connecting part, said arms being parallel to an axis of symmetry of said trunk and extending towards the securing part, said second end having an axial section that is smaller than an axial section of the first end and greater than an axial section of each of the flexible arms;
• c) determining a value relative to the structural characteristic of said at least one oscillating member formed;
• d) calculating dimensional corrections to be applied to the resonators formed, based on the value determined for the structural characteristic;
• e) modifying the dimensions of the resonators formed, based on the dimensional corrections calculated to obtain the set of resonators having structural characteristic values comprised within the predetermined range of values.