公开(公告)号：JP2002304711A

公开(公告)日：2002-10-18

申请号：JP2001389357

申请日：2001-12-21

Applicant: IBM

Inventor： DILL FREDERICK HAYES ,  FONTANA JR ROBERT EDWARD ,  PARKIN STUART STEPHEN PAPWORTH ,  TSANG CHING HWA

IPC: G11B5/39 ,  G11B5/33 ,  H01F10/16 ,  H01F10/32 ,  H01L43/08

Abstract: PROBLEM TO BE SOLVED: To provide an MR read head having an MTJ device formed to be sufficiently thin for attaining the high surface density by reducing the space between magnetic shields. SOLUTION: As to the magnetic tunnel junction MTJ device 100, the magneto-resistive(MR) read head has the MTJ device 100 located between two spaced-apart magnetic shields S1, S2. The magnetic shields function also as electrical leads for connecting the head to a detection circuit. Conductive spacer layers 102, 104 are located at the top and bottom of the MTJ device 100 to connect the MTJ device 100 to the shields. The thickness of the spacer layer is selected to optimize the spacing between the shields. Each of the shields has the pedestal region for reducing the electric short-circuit between the shields in the case the space between the shields is too small, and the MTJ device 100 is located between these two pedestals.