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.