公开(公告)号：JP2001357512A

公开(公告)日：2001-12-26

申请号：JP2001108310

申请日：2001-04-06

Applicant: EMTEC MAGNETICS GMBH

Inventor： VEITCH RONALD JOHN ,  JAKUSCH HELMUT DR ,  KOHL ALBERT ,  HEILMANN PETER DR ,  KRESS RIA ,  ILMER ANDREAS DR ,  MUELLER STEFAN ,  SANDROCK JOHANNES

IPC: B42D15/10 ,  G11B5/62 ,  G11B5/70 ,  G11B5/706 ,  G11B5/708 ,  G11B5/712 ,  G11B5/714 ,  G11B5/716 ,  G11B5/842 ,  G11B5/845 ,  G11B5/852 ,  H01F1/34

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording medium which has excellent electromagnetic characteristics in the entire range of the recording wavelength and excellent mechanical characteristics, is suitable for recording of digital data and can be manufactured by a well-known technique and in which the problem of head saturation is not caused. SOLUTION: In the multi layered magnetic recording medium suitable for high recording density and digital recording, having excellent electromagnetic recording characteristics in the entire range of a recording wavelength, excellent mechanical characteristics, improved surface smoothness and flat frequency response, an upper side magnetic recording layer having

公开(公告)号：JPH1145425A

公开(公告)日：1999-02-16

申请号：JP14311798

申请日：1998-05-25

Applicant: EMTEC MAGNETICS GMBH

Inventor： HEILMANN PETER DR ,  ILMER ANDREAS DR ,  JAKUSCH HELMUT DR ,  LENZ WERNER DR ,  MUNCH MICHEL DR ,  NICKOLAY GERD ,  SCHNEIDER NORBERT

IPC: G11B5/70 ,  G11B5/73 ,  G11B5/735 ,  G11B5/738 ,  G11B5/78 ,  G11B5/842

Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording material improved in the surface shape, having a good traveling property, particularly an improved output level, a low modulation noise and a less fluctuation in the output level during traveling of a tape. SOLUTION: This recording material consists of a nonmagnetic substrate and more than one different layer provided on this substrate and at least one layer among these different layers is a magnetic layer suitable for storing information. In this case, when the recording material 3 is mounted on a reference surface 2 while a surface 3' opposite to an information recording head imparts the tension of about 14-200 mN to the recording material 3, the recording material 3 has such a surface shape that 50% of the surface 3' is separated from the reference surface 2 by

公开(公告)号：DE19722137A1

公开(公告)日：1998-12-03

申请号：DE19722137

申请日：1997-05-27

Applicant: EMTEC MAGNETICS GMBH

Inventor： HEILMANN PETER DR ,  ILMER ANDREAS DR ,  JAKUSCH HELMUT DR ,  LENZ WERNER DR ,  MUNCH MICHEL DR ,  NICKOLAY GERD ,  SCHNEIDER NORBERT

IPC: G11B5/70 ,  G11B5/73 ,  G11B5/735 ,  G11B5/738 ,  G11B5/78 ,  G11B5/842 ,  G11B5/62 ,  G01B11/00

Abstract: The magnetic recording material has a non-magnetic substrate. One or several further layers are applied to the substrate. At least one of these further layers is a magnetic layer suitable for storing information. The surface of the recording material nearest to the magnetic head used for recording information has a surface profile formed such that 50% of the surface has a distance of no more than 80 nm from a reference surface (2). 90% of the surface has a distance of no more than 140 nm from the reference surface (2). The recording material (3) lies on the reference surface (2) with its surface under a tension of around 140 to 200 mN. Preferably the density function of the frequency of discrete distance values exhibits a monomodal distribution.