| abstract |
PROBLEM TO BE SOLVED: To provide a high-performance coil excellent in accuracy and reliability and a manufacturing method thereof. A coil manufacturing method comprising an insulating substrate and a conductor line formed on the insulating substrate, wherein at least the surface of the insulating substrate including a layer containing a polyimide resin having a siloxane structure on the surface is made of alkali. By a coil manufacturing method including a process of surface treatment and a process of forming the conductor line by an electroless plating process, high adhesion between an insulating resin material and an electroless plating film is realized, A high-performance coil with excellent reliability can be provided. [Selection figure] None |