公开(公告)号：DE3761931D1

公开(公告)日：1990-04-19

申请号：DE3761931

申请日：1987-12-19

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  GRAU WERNER DR ,  HACK JOACHIM

IPC: G11B5/72 ,  G11B5/64 ,  G11B5/71 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84

Abstract: 1. A magnetic recording medium consisting of a flexible disk-shaped nonmagnetic base, a cobalt/chromium alloy layer applied thereto snd suitable for vertical recording, and a friction-reducing layer present on this alloy layer, wherein the friction-reducing layer is a 5-100 nm thick amorphous carbon layer produced by sputtering.

公开(公告)号：DE3742767A1

公开(公告)日：1989-06-29

申请号：DE3742767

申请日：1987-12-17

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  FRECHEN THOMAS DR ,  HEILMANN PETER DR ,  KOCH VOLKER DR ,  DOERR KURT DR ,  HOFFMANN HANS-JOACHIM DR ,  NOWAK UWE DR

IPC: G11B5/72 ,  G11B5/84

公开(公告)号：DE3644822A1

公开(公告)日：1988-07-14

申请号：DE3644822

申请日：1986-12-31

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  NOWAK UWE DR ,  GRAU WERNER DR ,  KOCH VOLKER DR ,  KOENIG ROLAND DR

IPC: G11B5/72 ,  C10M105/02 ,  C10N40/18 ,  G11B5/71 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84

Abstract: The discs comprise a non-magnetic base material, a magnetic layer applied thereto on at least one side, based on a magnetic material finely distributed in an organic binder matrix, and a friction-reducing carbon layer, situated on the surface of the magnetic layer.

公开(公告)号：DE3876414D1

公开(公告)日：1993-01-14

申请号：DE3876414

申请日：1988-12-10

Applicant: BASF AG

Inventor： NOWAK UWE DR ,  HOFFMANN HANS-JOACHIM DR ,  DOERR KURT DR ,  KOCH VOLKER DR ,  HEILMANN PETER DR ,  FRECHEN THOMAS DR ,  HITZFELD MICHAEL DR

IPC: G11B5/72 ,  G11B5/84

Abstract: The recording tape or carrier consists essentially of a non-magnetic base and a thin layer of metallic and magnetic material deposited on the top, with a surface layer and a protecting layer of amorphous carbon which contains some hydrogen. This surface layer is produced in a vacuum chamber by means of a ''sputtering'' process with a carbon target.

公开(公告)号：DE3644823A1

公开(公告)日：1988-07-14

申请号：DE3644823

申请日：1986-12-31

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  GRAU WERNER DR ,  HACK JOACHIM

IPC: G11B5/72 ,  G11B5/64 ,  G11B5/71 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84

Abstract: 1. A magnetic recording medium consisting of a flexible disk-shaped nonmagnetic base, a cobalt/chromium alloy layer applied thereto snd suitable for vertical recording, and a friction-reducing layer present on this alloy layer, wherein the friction-reducing layer is a 5-100 nm thick amorphous carbon layer produced by sputtering.

公开(公告)号：DE3769111D1

公开(公告)日：1991-05-08

申请号：DE3769111

申请日：1987-12-19

Applicant: BASF AG

Inventor： HITZFELD MICHAEL DR ,  NOWAK UWE DR ,  GRAU WERNER DR ,  KOCH VOLKER DR ,  KOENIG ROLAND DR

IPC: G11B5/72 ,  C10M105/02 ,  C10N40/18 ,  G11B5/71 ,  G11B5/725 ,  G11B5/82 ,  G11B5/84

Abstract: The discs comprise a non-magnetic base material, a magnetic layer applied thereto on at least one side, based on a magnetic material finely distributed in an organic binder matrix, and a friction-reducing carbon layer, situated on the surface of the magnetic layer.

公开(公告)号：DE3842635A1

公开(公告)日：1990-06-21

申请号：DE3842635

申请日：1988-12-17

Applicant: BASF AG

Inventor： HIBST HARTMUT DR ,  WERNER AREND DR ,  HACK JOACHIM ,  MANNSPERGER HEINRICH DR ,  HITZFELD MICHAEL DR ,  GRAU WERNER DR ,  HEIL GUENTER DR ,  HOLL NORBERT

IPC: G11B23/03 ,  C10M105/34 ,  C10N20/06 ,  C10N40/18 ,  G11B5/64 ,  G11B5/66 ,  G11B5/72 ,  G11B5/725 ,  G11B5/73 ,  G11B5/84 ,  G11B23/033

Abstract: The invention relates to magnetic recording media in disc form, essentially composed of a flexible base material, a ferromagnetic thin metal layer applied on at least one side, and a protective and gliding layer, essentially composed of carbon, located on this metal layer, a process for producing these recording media and information memory containing these recording media.