Patent ID: 9340408
Filing Date: 2016-05-17
CPC Classification: B81B,H01L

Claim Text:
1. A sensor chip for detecting stress induced by external physical quantity, comprising: a deformable supporting structure layer; and a stress sensing micro-inductor layer formed on the deformable supporting structure layer, the stress sensing micro-inductor layer comprising: an insulating layer; at least one stress sensing magnetostrictive magnetic layer disposed at a side of the insulating layer; and a micro-coil layer disposed inside the insulating layer and surrounded by the insulating layer, wherein the micro-coil layer has a plurality of coils as an inductor winding of the micro-inductor layer, and the micro-coil layer insulates from the at least one stress sensing magnetostrictive magnetic layer through the insulating layer; and a measurement circuit linking to the stress sensing micro-inductor layer by a wire connection or a wireless transmission, wherein the at least one stress sensing magnetostrictive magnetic layer is configured to cause an inverse magnetostrictive effect due to the stress induced by the external physical quantity applied to the stress sensing micro-inductor layer resulting from deformation of the stress sensing micro-inductor layer, and the micro-coil layer is configured to have an inductance change by the inverse magnetostrictive effect, and the measurement circuit is configured to measure the inductance change of the micro-coil layer.