Method of making electronic transformer/inductor devices

A method for making a miniature inductor/transformer comprising:

• forming a thin layer of a ferromagnetic on a thin sheet of insulating material;
• etching said thin layer to form a series of thin discrete continuous ferromagnetic members extending in a first direction;
• forming a first thin sheet having a printed electrical circuit thereon;
• forming a second thin sheet having a printed circuit thereon;
• stacking, in a second direction perpendicular to the first direction, a plurality of said sheets having said etched ferromagnetic material members between said first and second thin sheets;
• forming through holes through said laminated sheets;
• and
• plating electrically conductive material within said through holes in electrical contact with said printed circuitry on said first and second thin sheets, said conductive through holes providing a portion of an electrical winding of the inductor/transformer.

A method for making a miniature inductor/transformer comprising:

• forming a thin layer of ferromagnetic on a thin sheet of insulating material;
• forming a first thin sheet having a printed circuit thereon;
• forming a second thin sheet having a printed circuit thereon;
• etching said thin layer to form a series of discrete continuous ferromagnetic members extending in a first direction;
• laminating, in a second direction perpendicular to said first direction, a plurality of said sheets having said etched layers of ferromagnetic material between first and second thin sheets;
• forming through holes through said laminated sheets;
• and
• plating electrically conductive material within said through holes in electrical contact with said printed circuitry on said first and second thin sheets, said conductive through holes providing a portion of an electrical winding of the inductor/transformer.