The fixing process according to the invention of a winding to one or more electronic circuits permits elimination of an important manufacturing step of the processes according to the prior art, whether the positioning, then the gluing or the precise fixing of the winding or of the core to be wound on the electronic circuit or circuits. By a suitable arrangement of the electronic circuit or circuits and of the possible core, independently of one another, on a holding tool according to the invention, a semi-finished product is obtained, also according to the invention, made up of said circuit or circuits and said winding, the mechanical connection between them being ensured solely by the copper wires producing, moreover, the electrical connecting between the two elements. The finished component according to the invention will be obtained by disposing the preceding semi-finished product on a support ensuring a permanent mechanical connection between the two elements.