Patent ID: 6107907
Filing Date: 2000-08-22
Classification: H01F,H03H,H05K

Abstract:
A surface mount electromagnetic interference suppressor for carrying a relatively high current and comprising:a lower ferrite layer, at least one intermediate ferrite layer, and an upper ferrite layer arranged in stacked relation and joined together to define a substantially rectangular ferrite body;a lower electrical conductor extending laterally between the lower ferrite layer and an adjacent intermediate ferrite layer, said lower electrical conductor comprising an elongate portion having a first end terminating at a first end of the substantially rectangular ferrite body, and an enlarged width portion connected to a second end of the elongate portion;an intermediate ferrite layer positioned adjacent the lower ferrite layer and having at least one first via opening extending vertically through the intermediate ferrite layer and in substantial registry with the enlarged width portion of said lower electrical conductor;a respective at least one first vertical electrical conductor extending through and covering interior wall portions of the at least one first via opening of the intermediate ferrite layer and being connected to the enlarged width portion of the lower electrical conductor;an intermediate electrical conductor extending laterally on the intermediate ferrite layer, the intermediate electrical conductor comprising a first enlarged width portion substantially overlying the at least one first vertical electrical conductor and being connected thereto, an elongate portion having a first end connected to the first enlarged width portion, and a second enlarged width portion connected to a second end of the elongate portion;the upper ferrite layer having at least one second via opening extending vertically therethrough and in substantial registry with an enlarged width portion of an adjacent intermediate electrical conductor;a respective at least one second vertical electrical conductor extending through and covering interior wall portions of the at least one second via opening of said upper ferrite layer and being connected to the enlarged width portion of the adjacent intermediate electrical conductor;an upper electrical conductor extending laterally along the upper ferrite layer and comprising an enlarged width portion substantially overlying the at least one second vertical electrical conductor and being connected thereto, and an elongate portion having a first end connected to said enlarged width portion and a second end terminating at a second end of the substantially rectangular ferrite body; anda pair of electrical conductors on respective first and second ends of the substantially rectangular ferrite body and connected to respective adjacent ends of the elongate portions of said lower and upper electrical conductors to facilitate surface mounting of the electromagnetic interference suppressor;each elongate portion of said lower, intermediate, and upper electrical conductors defining a predetermined cross-sectional area for carrying a relatively high current; andeach at least one first and second vertical electrical conductor defining a cross-sectional area at least twice as great as said predetermined cross-sectional area so that misalignment with a respective enlarged width portion still permits the electromagnetic interference suppressor to carry the relatively high current.