公开(公告)号：US20220120624A1

公开(公告)日：2022-04-21

申请号：US17427775

申请日：2019-07-23

Applicant: DAEGU GYEONGBUK INSTITUTE OF SCIENCE AND TECHNOLOGY

Inventor： June Seo KIM ,  Myoung Jae LEE ,  Hyeon Jun LEE

IPC: G01L1/12 ,  H01F10/32 ,  H01F10/14

Abstract: Disclosed is a force sensor. More particularly, the force sensor includes a first permanent magnet layer; a magnetic tunnel junction disposed on the first permanent magnet layer and configured to have a preset resistance value; and a second permanent magnet layer disposed to be spaced apart from the magnetic tunnel junction, wherein the second permanent magnet layer moves in a direction of the first permanent magnet layer when pressure is applied from outside, the preset resistance value of the magnetic tunnel junction is changed when a magnetic field strength formed between the first permanent magnet layer and the second permanent magnet layer becomes a preset strength or more according to movement of the second permanent magnet layer, and the force sensor senses the pressure based on a change in the preset resistance value.