Patent ID: 7428776

Claim:
A method of manufacturing a thin-film coil in which a first coil and a second coil each having a desired number of windings are electrically connected in series and the second coil is formed between winding portions of the first coil on substantially the same plane, comprising: forming the first coil having a predetermined number of windings with top and side walls, via a first insulating film; forming a second insulating film on a surface of the first coil and between the winding portions of the first coil; forming an underlying conductive film on the second insulating film, and removing portions of the underlying conductive film from top portions and side wall portions of the second insulating film so as to leave only bottom portions of the underlying conductive film between the winding portions of the first coil and not along the top and side walls of the first coil; and growing a deposition of material originating from a remaining portion of the underlying conductive film on the bottom portions of the underlying conducting film between the winding portions of the first coil so as to form the second coil.