公开(公告)号：DE3567549D1

公开(公告)日：1989-02-16

申请号：DE3567549

申请日：1985-05-14

Applicant: BASF AG

Inventor： KRAUS GEROLD ,  HUBER WALTER ,  HACK JOACHIM ,  SCHULZE-BERGE KLAUS ,  SOLD ROLAND

IPC: G11B5/56 ,  G11B5/58 ,  G11B5/596 ,  G11B20/18 ,  G11B21/10 ,  G11B23/36

Abstract: A method and an arrangement for detecting error signals in a magnetic disk drive apparatus uses a test disk which has a plurality of test tracks distributed over the recording area and containing special test signals, a distinction being made between orientation, adjustment and azimuth bursts. Based on the normal position of the recording tracks of the magnetic disk, the spacing of the test tracks could depend on the type of step motor if such a motor is used in the positioning device. By special control, hysteresis errors can be measured in addition to tracking errors, eccentricity errors and azimuth errors. An advantageous use is for all types of disk drives, preferably FlexyDisk drives.

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：DE3271284D1

公开(公告)日：1986-07-03

申请号：DE3271284

申请日：1982-01-28

Applicant: BASF AG

Inventor： GEHRUNG MANFRED ,  SCHOETTLE KLAUS ,  KREISSLER HELMUT ,  RUDOLF PETER ,  HACK JOACHIM ,  ANSLINGER FRIEDRICH

IPC: G11B5/84 ,  B24B7/13 ,  B24B7/16 ,  B24B21/04

公开(公告)号：GB2115971B

公开(公告)日：1985-09-11

申请号：GB8233743

申请日：1982-11-26

Applicant: BASF AG

Inventor： MANZKE KLAUS ,  BROTZLER ROLAND ,  HACK JOACHIM

IPC: G11B17/028 ,  G11B19/00 ,  G11B17/02

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.

公开(公告)号：DE3466819D1

公开(公告)日：1987-11-19

申请号：DE3466819

申请日：1984-07-10

Applicant: BASF AG

Inventor： LEHNER AUGUST ,  HACK JOACHIM ,  KRUCKER KARL DR ,  BALZ WERNER DR ,  ROEMER KARL HEINZ ,  RUDOLF PETER ,  FALK ROLAND DR ,  ECKERT GUENTER DR

IPC: G11B5/845 ,  C09D5/23 ,  G11B5/70 ,  G11B5/702 ,  G11B5/842

公开(公告)号：DE3325556A1

公开(公告)日：1985-01-24

申请号：DE3325556

申请日：1983-07-15

Applicant: BASF AG

Inventor： ROLLER HERMANN ,  LEHNER AUGUST ,  HACK JOACHIM ,  GRAU WERNER DR ,  BALZ WERNER DR ,  BAUR REINHOLD DR

IPC: G11B5/842 ,  C09D5/23 ,  C09D7/12 ,  G11B5/70 ,  G11B5/702 ,  G11B5/73 ,  G11B5/735 ,  G11B5/84 ,  G11B5/68 ,  C09D3/16 ,  C09D3/72 ,  B05D5/12

Abstract: Magnetic recording media which have a thin backing coating and consist of a non-magnetic flexible base and a magnetic layer which is applied to one side of the base and comprises magnetic material finely dispersed in an organic binder are produced by applying a dispersion of finely divided non-magnetizable conductive and non-conductive solids and conventional additives in a solution of a polymeric binder in an organic solvent to that side of the base which is opposite the magnetic layer by means of a knife-coater, and then drying the layer, a high molecular weight organic compound which acts as a thickener being added to the backing coating dispersion.

公开(公告)号：DE3066157D1

公开(公告)日：1984-02-23

申请号：DE3066157

申请日：1980-06-23

Applicant: BASF AG

Inventor： HACK JOACHIM

IPC: G11B21/10 ,  G11B5/024 ,  G11B5/09 ,  G11B5/58 ,  G11B5/596

公开(公告)号：CA1028208A

公开(公告)日：1978-03-21

申请号：CA209635

申请日：1974-09-18

Applicant: BASF AG

Inventor： NEUMANN UTE ,  ROLLER HERMANN ,  HARTMANN JOB-WERNER ,  HACK JOACHIM ,  MOTZ HERBERT ,  OSTERTAG WERNER

IPC: C07F9/09 ,  C08K5/521 ,  C09D5/23 ,  C09D7/12 ,  G11B5/71 ,  G11B5/72 ,  G11B5/725

Abstract: Coated magnetic recording media, especially video tapes and computer tapes, comprising a non-magnetic base carrying a magnetic coating which consists of a dispersion, essentially containing a finely divided magnetic pigment in an organic binder and at least one lubricant. A compound of the formula in which n is an integer of from 1 to 3 and R is alkyl, alkoxyalkyl or aralkyl, each of 3 to 18 carbon atoms, is used as a lubricant. The products have high abrasion resistance coupled with only little transfer of material to the magnetic heads even under fluctuating climatic conditions.

公开(公告)号：DE3574192D1

公开(公告)日：1989-12-14

申请号：DE3574192

申请日：1985-08-19

Applicant: BASF AG

Inventor： ROLLER HERMANN ,  HACK JOACHIM ,  WOWERIES UWE ,  LEHNER AUGUST ,  GRAU WERNER DR ,  NAGEL PETER ,  FALK ROLAND DR

IPC: C08J7/04 ,  C09D5/23 ,  C09D175/00 ,  C09D175/04 ,  C10M105/56 ,  C10N40/18 ,  C10N70/00 ,  G11B5/702 ,  G11B5/842