Patent ID: 7696055

Claim:
A method for manufacturing passive devices including inductors and vias formed on a substrate in an integration manner using a thin metal piece, the method comprising the steps of: forming an adhesive layer on a dummy substrate; bonding a thin metal piece on the adhesive layer; attaching a masking material to the thin metal piece, patterning regions where vias are to be formed, and etching the thin metal piece at a predetermined depth; removing the masking material, filling the etched portion with polymer to form a flat polymer layer, attaching a masking material on the polymer layer, pattering regions that form metal pads, forming metal pads, and attaching the formed device to a lower substrate, using the metal pads; removing the adhesive layer and the dummy substrate, attaching a masking material on a surface exposed after the dummy substrate of the thin metal piece is removed, patterning regions where passive devices including inductors or vias are to be formed, and etching the thin metal piece at a predetermined depth; and forming solder bumps for surface-mounting after removing the masking material.