公开(公告)号：DE2812675A1

公开(公告)日：1978-10-12

申请号：DE2812675

申请日：1978-03-23

Applicant: IBM

Inventor： HANNON DAVID MALCOLM

IPC: G11C11/14 ,  G11C19/08 ,  H01F10/00

Abstract: Two parallel conductors are positioned on top of a magnetic layer where bubble domains are to be coded. The two parallel conductors are positioned to form a gap therebetween of a particular size. An external in-plane magnetic field is applied to the magnetic layer. The size of the gap is selected such that when current is simultaneously applied in both conductors, a local in-plane field will be formed in the gap which is sufficient for coding bubble wall states and a vertical field will be formed in the gap sufficient to retain a bubble in the gap during the application of current to the conductors. The application of current in the one direction in the conductors codes a bubble with one pair (S = 0) of Bloch lines and the application of current in the opposite direction codes a bubble with no Bloch lines (S = 1).

公开(公告)号：SG44377A1

公开(公告)日：1997-12-19

申请号：SG1996000024

申请日：1994-09-06

Applicant: IBM

Inventor： ABBOUD SAMIR ELIAS ,  APUZZO NICKOLAS CHRISTOPHER ,  BROWN JEFFREY BERNARD ,  CUNNINGHAM EARL ALBERT ,  HANNON DAVID MALCOLM ,  MALLETTE RAYMOND PATRICK ,  TYLER PAUL SHELDON ,  VOSS STEVEN HARRY

IPC: G11B5/00 ,  G11B5/39 ,  G11B5/465 ,  G11B5/48 ,  H01L43/12

Abstract: The magnetic states of MR reproducing heads are reinitialized during media drive manufacturing by applying initializing magnetic fields to the transducers after they have been manufactured and incorporated into media drive assemblies.