▎ 摘　　要

NOVELTY - The sensor has a substrate (110) that comprises a corrugated and/or stepped surface. A continuous graphene layer is arranged on the corrugated and/or stepped surface of the substrate. Two conductive elements (122) are provided in contact with the graphene layer. The graphene layer substantially conforms to the corrugated and/or stepped surface of the substrate. The corrugated and/or stepped surface of the substrate comprises one peak element and one trough element. The corrugated and/or stepped surface of the substrate comprises two peak elements and two trough elements. USE - Magnetoresistance sensor for medical cabinet drawer to identify if it is in the open or closed position and used as dead-man switch for deactivating treadmill. ADVANTAGE - By having the graphene layer conforming to the corrugated and/or stepped surface, a stable magnetoresistance up to about 400 K can be obtained. A magneto resistance performance of about 2000% with a perpendicular magnetic field of 9.0 T at 300 K and 400 K is obtained. The magneto-resistance sensor is stable and is able to work in wide magnetic field range from at least 10 mT. The graphene layer can serve as a gate dielectric layer, gate voltage can be applied to tune the mobility and carrier density of graphene layer. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method of fabricating a magnetoresistance sensor. DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of a sensor together with an optical micrograph of a top view of the sensor. Positioning sensor (100) Substrate (110) Corrugated insulating layer (112) Groove (116) Conductive element (122)