Patent ID: 7362098
Filing Date: 2008-04-22
Classification: G01R

Abstract:
1. A magnetic field sensor characterized by comprising a substrate, a stacked coil formed on said substrate, and a strip line formed on said substrate to continue to said stacked coil, wherein said stacked coil comprises coil forming elements respectively formed of at least two conductor layers on said substrate, and contact means, formed in an interlayer dielectric film interposed between said conductor layers, for bringing said coil forming elements on and under said interlayer dielectric film into contact with each other through a via hole, said strip line comprises a structure in which a lower grounding layer, a lower interlayer dielectric film, a strip conductor, an upper interlayer dielectric film, and an upper grounding layer are stacked on said substrate in an order named, the number of turns of said stacked coil is larger than 1, one end of said stacked coil continues to either one grounding layer of said lower grounding layer and said upper grounding layer, and the other end of said stacked coil continues to said strip conductor.