Patent ID: 6636139
Filing Date: 2003-10-21
Classification: H01F,H01L

Abstract:
A method of creating a spiral inductor, comprising the steps of:providing a substrate, interconnect lines having been provided over said substrate for connection thereto of inductor terminals; depositing a layer of dielectric over said substrate, thereby including said interconnect lines; depositing a layer of passivation over said layer of dielectric; patterning said layer of dielectric and said layer of passivation, creating first via openings through said layers of dielectric and passivation aligned with said interconnect lines, exposing the surface of said interconnect lines; depositing a first layer of metal over said layer of passivation, including inside surfaces of said first via openings, said first layer of metal being deposited to a thickness between about 6 and 26 &mgr;m; patterning and etching said deposited first layer of metal, creating metal lines for an inductor, further creating first vias for interconnecting said inductor to said exposed surfaces of said interconnect lines, said first vias being connected to said inductor and forming terminal ports for said inductor, said first vias having a surface area overlying said layer of passivation larger than about 0.17Ã—0.17 &mgr;m; and depositing a layer of polyimide over said layer of passivation, including said created inductor and inside surfaces of said created first vias.