公开(公告)号：DE3370392D1

公开(公告)日：1987-04-23

申请号：DE3370392

申请日：1983-12-15

Applicant: IBM

Inventor： BEAM DAVID LARRY ,  DOUBLE GLEN PAUL

IPC: G11B5/39

Abstract: A read head is formed from a magneto resistive element (14) extending coplanar with a magnetically permeable yoke member (15). The yoke member includes leg portions (16, 17, 18) forming pole faces. A first pole face extends adjacent to one edge of the element. A second pole face extends adjacent to the element. In operation the read head is located so that the element extends perpendicular to a surface (11) formed with flux transitions to be detected. The first pole face is located on the edge of the element remote from the surface. The second pole face extends over at least one flux transition (19) adjacent to a flux transition (21) beneath the element.