Magnetic inlay with an adjustable inductance value for a component carrier and a manufacturing method

A component carrier, comprising:

• a stack comprising at least one electrically conductive layer structure and/or at least one electrically insulating layer structure;
• a magnetic inlay assembled to the stack;
• the magnetic inlay comprising:
• a magnetic matrix;
• at least one electrically conductive structure embedded horizontally in the magnetic matrix, wherein the at least one electrically conductive structure is a structured electrically conductive layer, wherein the electrically conductive structure is configured as an inductive element;
• wherein the geometrical properties of the electrically conductive structure provide a specific inductance value in the range 10 to 10000 nH/mm2.

A method of manufacturing a magnetic inlay for a component carrier, the method comprising:

• providing a temporary carrier;
• arranging a first magnetic element on a first side of the temporary carrier;
• arranging a second magnetic element on a second side, being opposed to the first side, of the temporary carrier;
• arranging a first electrically conductive structure on the first magnetic element;
• arranging a second electrically conductive structure on the second magnetic element;
• wherein at least one of the first electrically conductive structure and the second electrically conductive structure is a patterned electrically conductive layer;
• arranging a further first magnetic element on the first magnetic element, thereby enclosing the first electrically conductive structure in a first magnetic matrix;
• arranging a further second magnetic element on the second magnetic element, thereby enclosing the second electrically conductive structure in a second magnetic matrix;
• separating a first magnetic inlay from the first side of the temporary carrier;
• and
• separating a second magnetic inlay from the second side of the temporary carrier,
• wherein the respective geometrical properties of the first electrically conductive structure and the second electrically conductive structure provide a respective specific inductance value.

A method of adjusting the inductance of a magnetic inlay for a component carrier to a specific inductance value, the method comprising:

• providing a first magnetic element with a first magnetic matrix;
• providing an electrically conductive structure that is configured as an inductive element, hereby determining specific geometrical properties for the electrically conductive structure that correspond to an inductance value in the range 10 to 10000 nH/mm2;
• arranging the electrically conductive structure on or in the first magnetic element, wherein the at least one electrically conductive structure is a structured electrically conductive layer;
• arranging a second magnetic element with a second magnetic matrix, on the first magnetic element, thereby enclosing the electrically conductive structure in magnetic material to obtain the magnetic inlay with the specific inductance value.