Patent ID: 9606193
Date: 2017-03-28
CPC Classifications: G01R,H01L

Claim:
1. An Integrated Dual Axis Fluxgate Sensor, comprising: a processed semiconductor having a planar top surface including a first SiN layer on the top surface; a first TetraEthyl OrthoSilicate (TEOS) layer configured to define a form for a bottom layer of a coil; a first copper conductor layer deposited in the TEOS form thereby forming the bottom layer of the coil; a second SiN layer overlaying the top surface of the first TEOS layer and the top surface of the first copper conductor layer forming the bottom layer of the coil; a second TEOS layer overlaying and touching the top surface of the second SiN layer and a third SiN layer overlaying the second TEOS layer; a titanium layer overlaying and touching the top surface of the third SiN layer; a laminated magnetic core structure selected from a group of a first magnetic lamination or a second magnetic lamination; a third TEOS layer overlying the third SiN layer, the bottom layer of the coil and the top surface of the laminated magnetic core structure, wherein the third TEOS layer is configured to define a form for a plurality of openings touching the bottom layer of the coil; a second copper conductor layer deposited in the plurality of openings forming vias touching and coupling to the bottom layer of the coil; a third copper layer defined to form the top layer of the coil wherein the third copper layer connects to the vias thereby coupling the top layer of the coil to the bottom layer of the coil; and a passivation layer touching the top surface of the third TEOS layer and the top surface of the top layer of coil, wherein the passivation layer included openings in the passivation layer to contact the top layer of the coil.