METHOD FOR THE PRODUCTION OF A SPIRAL HAIRSPRING FOR MECHANICAL MOVEMENTS, AND SPIRAL HAIRSPRING

摘要

The invention relates to a method for producing a spiral hairspring (4) for mechanical movements. First, a plurality of spiral hairsprings (4) are separated from a silicon wafer. The spiral hairsprings (4) that are still connected to the silicon wafer but exposed are then thermally oxidized. The SiO2 layer (20) is finally removed in at least one portion (11) of the stabilization portion (LS) down to at least the core (25) of the spiral hairspring (4).