Magnetic transducer including a plurality of heads and method for producing the magnetic transducer

A method for producing a magnetic transducer adapted for recording and/or reading data on a magnetic substrate (12), this transducer including at least one row of p magnetic heads (T1, T2, T3, etc.), each of these heads comprising an elongated magnetic core provided with an exciting winding, this method comprising:

• providing at least one support block (such as 19-1) of nonmagnetic material, having a series of p grooves (18-1, 18-2, . . . , 18-p) on one of its faces (20), each of said grooves having dimensions sufficient to permit accommodating in it a magnetic core provided with its winding, this method further being characterized by the steps of:
• forming at least one winding (such as E1-1) of insulated conductor wire on each magnetic core (such as 17-1) such that each winding has two non-wound portions (22, 23), in addition to its wound portion;
• placing each of the cores so provided (17-1, 17-2, . . . , 17-p) into each of said grooves (18-1, 18-2, . . . , 18-p), such that the non-wound portions (22, 23) of said conductor wires project above said face (20);
• completely filling said grooves provided with these cores with the aid of a hardenable nonmagnetic substance;
• precision grinding said face (20), after hardening of this substance, such as to sever said portions (22, 23) of said conductors projecting above said face and thus causing contact dots (24, 25) to appear, comprising the ends of the windings (E1-1, E1-2, . . . , E1-p) embedded in this hardened substance, these contact dots being intended for permitting connection of these windings with an electrical control circuit (11).