Patent ID: 8707547

Claim:
A method for fabricating a lead-frameless power inductor comprising the steps of: preparing a lower substrate; forming a plurality of separated conducting metal layers on said lower substrate; forming a wire package on an upper surface of said lower substrate, wherein said wire package is an assembly of coil units arrayed to form a matrix, and said coil units have insulation layers on their surfaces so as to set each coil unit between two adjacent conducting layers, and lead wires between two adjacent coil units are connected with said conducting metal layers and fixed; with an enclosing layer made of a magnetic powder consisting colloid; dividing and separating said substrate into a plurality of granulated elements by cutting process, wherein each divided granulated element has conducting metal layers at two sides of its upper surface, said coil unit is formed between two adjacent conducting metal layers, said coil unit is connected with said conducting metal layer with said lead wires, and said conducting metal layers, said coil units, and said lead wires are covered with said enclosing layer; and forming said conducting metal layer on both sides of said element so as to form a product of a surface mounting device.