公开(公告)号：JPS62232139A

公开(公告)日：1987-10-12

申请号：JP1747187

申请日：1987-01-29

Applicant: IBM

Inventor： ELSNER GERHARD ,  GRESCHNER JOHANN ,  HINKEL HOLGER

IPC: H01L21/68 ,  H01L21/027 ,  H01L21/306 ,  H01L21/67 ,  H01L23/544

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：CA1187174A

公开(公告)日：1985-05-14

申请号：CA404019

申请日：1982-05-28

Applicant: IBM

Inventor： HINKEL HOLGER ,  KUENZEL ULRICH ,  MAX ERHARD ,  SCHNEIDER JOCHEN

IPC: G11B5/73 ,  G11B5/84 ,  G11B5/14

Abstract: MAGNETIC DISK SUBSTRATE WITH A CORE OF SYNTHETIC MATERIAL A magnetic disk substrate consists of a core of synthetic material which on both sides is covered with metal foils. The preferably used steel foils have a thickness between 10.mu.m and 300.mu.m, and with their material properties determine the surface micro-hardness as well as the peak to valley height. Onto these surfaces the actual magnetic layer is applied. This magnetic disk substrate is made either through molding under the influence of heat, or through foaming of the space between the two metal foils in a suitable mold.

公开(公告)号：DE3683763D1

公开(公告)日：1992-03-12

申请号：DE3683763

申请日：1986-03-27

Applicant: IBM DEUTSCHLAND

Inventor： ELSNER GERHARD ,  GRESCHNER JOHANN ,  HINKEL HOLGER

IPC: H01L21/68 ,  H01L21/027 ,  H01L21/306 ,  H01L21/67 ,  H01L23/544 ,  H01L21/31

Abstract: Identically positioned alignment marks are formed on opposite sides of a semiconductor wafer by (i) coating both wafer sides with an insulating layer (2,3); (ii) directing high energy heavy ions onto the front side layer (2), the ions penetrating both layers (2,3) nuclear tracks (4, 4') to form single disturbed lattice nuclear tracks (4, 4') in the layers without disturbing the crystal latt-ice of the wafer; (iii) etching the nuclear tracks (4,4') to form identically positioned pores in the layers; and (iv) using the pores as alignment marks for further processing.

公开(公告)号：CA1172154A

公开(公告)日：1984-08-07

申请号：CA382162

申请日：1981-07-21

Applicant: IBM

Inventor： FROSCH ALBERT ,  HINKEL HOLGER ,  KRAUS GEORG ,  KUNZEL ULRICH ,  ROGALLA DIETRICH ,  SCHNEIDER JOCHEN

IPC: B32B5/28 ,  B32B5/22 ,  B32B33/00 ,  G11B5/62 ,  G11B5/73 ,  G11B5/733 ,  G11B5/82 ,  B32B5/26

Abstract: The invention provides a magentic disk substrate of plastic containing fibres in which the substrate is pressed in the form of a laminate from a plurality of thin lamellae of fibre reinforced plastic, which are arranged on top of each other at equal angular spacing.