Patent ID: 6769166
Filing Date: 2004-08-03
Classification: G01R,Y10T

Abstract:
A method of making an electrical current sensor for measuring a current (I; Ia, Ib) by detecting a magnetic field generated by this current, said sensor comprising at least one electrical conducting portion (6; 6a, 6b) of substantially rectangular cross-section having ends arranged so as to enable connection of said conductor portion in series with two conductors carrying the current to be measured, said conductor portion being surrounded, on three of said connector portion's lateral faces, by a magnetic circuit portion (7) which comprises end portions (7â€², 7â€³) having planar surfaces situated substantially in a plane of a fourth lateral face of said conductor portion (6), a magnetic field detector (3; 24; 26) being arranged opposite said fourth lateral face, whereinsaid conductor portion (6) is made by photo-lithography and etching in a layer of electrically conducting material applied on a first surface of a flat support member (1; 1â€²; 1â€³) or on one or more intermediate layers of intermediate layer portions (8, 9, 10, 11) deposited on said first surface of this support member; said magnetic circuit portion (7) is made by photo-lithography and etching in a layer of magnetically permeable material applied on said conductor portion (6) and on portions of said first surface of the support member (1; 1â€², 1â€³) or of an intermediate layer (8); and said magnetic field detector (3; 26) is fixed to said support member (1; 1â€², 1â€³) or on one or more layers or portions of intermediate layers (9, 10, 11) deposited on a second surface of the support member opposed to said first surface thereof.