PROCEDE D'OBTENTION D'UN MOTIF NOTAMMENT EN MATERIAU FERROMAGNETIQUE AYANT DES FLANCS DE PENTE DIFFERENTE ET TETE MAGNETIQUE COMPORTANT UN TEL MOTIF

摘要

This process consists in depositing a photosensitive resin layer (6) on a ferromagnetic layer (4) resting on a ceramic base (2); in photolithoetching an opening (8) in this resin layer and in then polymerising this resin so that the flanks (8a) of the said opening are sloped; forming a two-layer mask (10a, 12a) on the resin layer partly masking the said opening and defining the shape of the pattern to be produced in the ferromagnetic layer; anisotropically etching the resin layer so as to remove the unmasked regions of this layer; removing the mask; anisotropically etching the ferromagnetic layer (4) whilst using the etched resin layer as etching mask (6a), and removing the remainder of the resin layer. ……