公开(公告)号：DE3068214D1

公开(公告)日：1984-07-19

申请号：DE3068214

申请日：1980-09-06

Applicant: IBM DEUTSCHLAND ,  IBM

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

IPC: B32B5/28 ,  B32B5/22 ,  B32B33/00 ,  G11B5/62 ,  G11B5/73 ,  G11B5/733 ,  G11B5/82 ,  G11B5/70 ,  H01F10/28

Abstract: 1. A magnetic disk substrate comprising a laminate of thin plastic lamellae (L1, L2, ..., LK), characterized in that said lamellae are reinforced by fibers (2) aligned in parallel to each other, that said anisotropic lamellae are arranged on top of each other at angular distances that are as large as possible, ranging from 0 to 60 degrees, and that the density of the outer lamellae is lower than that of the inner lamellae.

公开(公告)号：DE2713190A1

公开(公告)日：1978-10-05

申请号：DE2713190

申请日：1977-03-25

Applicant: IBM DEUTSCHLAND

Inventor： ROGALLA DIETRICH DR ,  SCHNEIDER JOCHEN DIPL PHYS

IPC: C23C14/00 ,  H01F10/13 ,  H01F41/14 ,  C23C13/02

Abstract: Amorphous layers contg. Gd and Fe are made by vapour deposition, in an appts. using a vacuum of min. 10-8 torr and then a partial pressure (Pa) of a reactive gas during vapour deposition of Gd and Fe at specific speeds on a substrate. The speeds and Pa are pref. matched to produce a desired collapse field strength, saturation magnetisation, and coercive force. Only Gd and Fe may be deposited, or a non-magnetic metal, esp. Pd, may also be included, esp. using max. 10 atom % Pd in the Fe + Pd. Reactive gas is pref. O2, H2, or N2. Used for the mfr. of bubble memories. Gd-FE-(Pd) layers obtd. have good magnetic properties, esp. a very low coercive force.