公开(公告)号：CA1242272A

公开(公告)日：1988-09-20

申请号：CA503284

申请日：1986-03-04

Applicant: IBM

Inventor： BANDARA UPALI ,  ELSNER GERHARD ,  HEINRICH VOLKER ,  HINKEL HOLGER ,  LANG ARTUR ,  PRINZ ERWIN ,  STEINER WERNER ,  ZAPKA WERNER

IPC: G11B5/84 ,  G01N3/56 ,  G01N13/00 ,  G01N27/00 ,  G11B5/00 ,  G11B5/012 ,  G11B5/58 ,  G11B17/32 ,  G11B33/10 ,  G11B5/455 ,  G01N17/00 ,  G01N19/00

Abstract: SYSTEM FOR TESTING MAGNETIC HEAD/DISK INTERFACES Method for measuring the properties of a slider/disk interface in a magnetic disk storage apparatus by measuring a triboelectric current flowing between disk and slider. Rotational speed is adjusted between 100 and 500 rpm so as to obtain a frictional contact between disk and slider. The shape of the tribo current curve obtained during the measuring time interval is analyzed. An early maximum of the tribo current amplitude and a subsequent continual decay indicates a good slider/disk interface and a long lifetime.

公开(公告)号：DE19720251A1

公开(公告)日：1998-11-19

申请号：DE19720251

申请日：1997-05-15

Applicant: FRAUNHOFER GES FORSCHUNG ,  IBM

Inventor： GOEDICKE KLAUS ,  WINKLER TORSTEN ,  JUNGHAEHNEL MICHAEL ,  LANG ARTUR ,  MEYER DIETER ,  MUELLER MANFRED ,  SCHNEIDER HANS-HERRMANN ,  SCHNEIDER RAINER C

IPC: C23C14/32 ,  G11B5/84 ,  G11B5/85 ,  G11B5/851

Abstract: is used to coat thin film magnetic plates having a substrate. The method involves sputtering the magnetic substrates to provide a layer system, with a lower layer, a magnetic memory layer and a cover layer. While applying the lower layer and/or the magnetic memory layer, the energy is fed into the plasma in pulse form. A pulse repetition frequency of (10) to (80) kHz is set. For a predetermined layer thickness the ratio of pulse length and pulse duration is set according to the target value for the coercivity field strength. Preferably the substrate temperature on applying the lower layer and/or the magnetic layer is set to 200 to 230 C. The pressure is preferably set to 0.8 Pa.