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    1.
    发明专利
    未知

    公开(公告)号：DE1621094A1

    公开(公告)日：1971-04-29

    申请号：DE1621094

    申请日：1967-12-11

    Applicant: IBM

    Inventor： MERRITT BROWNLOW JAMES ,  DAHMS HARALD

    IPC: C25D5/18 ,  H01F41/26 ,  C23B5/32

    Abstract: 1,164,670. Magnetic structures. INTERNATIONAL BUSINESS MACHINES CORP. 4 Dec., 1967 [15 Dec., 1966], No. 55020/67. Heading H1H. [Also in Division C7] A magnetic alloy film is formed on a conductive substrate by electroplating from an electrolyte containing ions of the alloy constituents by applying one or more current pulses in which the magnitude of the or each pulse is initially significantly greater than the current required for plating the alloy constituents in a desired proportion under equilibrium conditions and in which the magnitude of the pulse is subsequently decreased with time so that throughout the process the proportions of the alloy constituents deposited are constant. Typically the pulse magnitude is decreased to the equilibrium value and is thereafter maintained constant for a period. If a series of pulses is used, agitation of the electrolyte may be effected at the end of each pulse. As described the method is applied to electroplating on to a smooth rolled copper sheet or vapour deposited silver or electroless silver or copper a Ni/Fe alloy. Details are given of current values for obtaining specific thicknesses of specific alloys. Plating is effected in a magnetic field at the centre of a Helmholtz coil. Reference is made to plating ternary alloys NiFeCu, e.g. as in Specification 1,139,987, NiFeCo and a four component alloy NiFeCoCu, all of zero magnetostriction.

    2.
    发明专利
    未知

    公开(公告)号：DE1932559A1

    公开(公告)日：1970-08-27

    申请号：DE1932559

    申请日：1969-06-27

    Applicant: IBM

    Inventor： STODDARD ALBERTS GENE ,  MERRITT BROWNLOW JAMES

    IPC: C25D3/56 ,  C25D5/18 ,  H01F10/06 ,  H01F3/00

    Abstract: 1,254,575. Electro-plating ferromagnetic films. INTERNATIONAL BUSINESS MACHINES CORP. June 5, 1969 [July 10, 1968), No.28517/69. Heading C7B. A ferromagnetic Ni-Fe alloy film is electroplated on conducting portions of a substrate surface immersed in an aqueous bath comprising 0.084- 0À211 mole/1 of Ni ions and 0À168-0À422 mole/l of Cl ions, e.g. added as NiCl 2 , 0.0054-0.0211 mole/l of Fe ions, e.g. added as FeSO 4 , optionally 0À0006-0À002 mole/l of Cu ions, e.g. added as CuSO 4 , 0À0248-0À0532 mole/l of tartrate ions, e.g. added as NaK tartrate, 0À1-0À3 g/l of saccharin (as 10% aqueous solution) and 0.3-0.6 g/l of a surfactant e.g. (Registered Trade Mark), "Triton" by passing a series of plating current pulses each depositing an alloy layer (e.g. 300 A thick with maximum coercivity 6) on the conducting portions. Up to 0À00362 mole/l of K 2 CO 3 may be dissolved in the bath. The pH of the bath is 3.9-5.8. Each current pulse may have a duration of 6 seconds with the bath being stirred for 4 seconds and subsequently left for 20 seconds between successive pulses. The invention is preferably applicable to edge plating bit lines on a multi-layered device to form a magnetic coupled film memory device, or plating cylindrical forms. The multi-layered device may be prepared by electro-plating a first smoothing Cu film on to a metal layer evaporated on to an insulating layer 3 on a ground plane 2 using a bath and method disclosed in Specification 1, 254, 577; electro-plating a first permalloy film 4 by the method disclosed in Specifications 1, 164, 670 or 1, 139, 987; electroplating a thick Cu film 5 by the method disclosed in Specification 1, 254, 576; electro-plating a second smoothing Cu film, then a second permalloy film 6; annealing the device at 200‹ C. in a magnetic field; photo-etching to form a set of bit lines 8 with resist resin 9 retained on top; then electro-plating the line edges with permalloy film 7 according to the invention.

    3.
    发明专利
    未知

    公开(公告)号：DE1290638B

    公开(公告)日：1969-03-13

    申请号：DEI0023935

    申请日：1963-06-24

    Applicant: IBM

    Inventor： MERRITT BROWNLOW JAMES ,  RUDOLPH GREBE KURT

    IPC: G11B5/64 ,  G11B5/70 ,  G11B5/702 ,  G11C11/06 ,  H01F41/16 ,  G11C11/04

    Abstract: 997,326. Magnetic storage apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. June 26, 1963 [June 29, 1962], No. 25327/63. Heading H3B. [Also in Division HI] A magnetic storage array is manufactured by coating conductive wires with successive layers of wax and a ferrite resin mixture, mounting the wires in parallel alignment in two open frames, orienting the frames so that the wires are orthogonal, pressing the frames together so that the wire coatings adhere, cutting the wires away from the frames after partial curing has taken place and finally sintering the ferrite at higher temperatures. The wax and resin are burnt away during the sintering process, the wax providing a space between the wires and the surrounding ferrite which prevents fracturing of the magnetic material. The co-ordinate wires may be positioned either as shown in Fig. 1A or Fig. 2, the latter arrangement providing a web of ferrite 3 between the wires 4, 5 at each crossing point. Where more than one wire is provided in each co-ordinate at each crossing point, these wires are insulated and twisted together in Fig. 3 (not shown). Depending on the materials used, the suggested temperatures for the process are 25-150‹ C. for partial curing, increasing to 100-150‹ C. to melt the wax coating. The temperature is then raised, firstly to 600‹ C. to remove the resin and plasticizer and then to 900-1400‹ C. to sinter the ferrite. Annealed platinum, palladium, silver or copper may be used for the wires, and the wax coating may be either natural or synthetic such as beeswax, carnauba wax, polyethylene wax or paraffin wax. Other suitable wax-like substances are polyvinyl acetate, polyvinyl chloride and their copolymers. The ferrite resin comprises 40-80% by weight of calcinated ferrite powder, 5-60% of thermosetting resin plus catalyst and 0-30% of plasticizers. Suitable ferrite powders exhibiting the required rectangular hystesis loop are Fe 1 . 83 Mn 1 . 08 Cu. 09 O 4 , Fe 1 . 68 Mn 1 . 25 Cr. 06 Ni. 03 O 4 , Fe 1 . 7 Mn. 6 Mg. 7 O 4 , and Fe 1 . 65 Mn 0 . 95 Cr. 10 Zn. 25 Cu. 02 O 4 . The resins may be epoxy resins, polyester resins, melamine-formaldehyde resins or phenol aldehyde resins. Suitable catalysts for the resins are described, and examples of various viscosity control agents are given such as pine and castor oils, butyl glycidyl ether or a 1: 1 mixture of methyl ethyl ketone and amyl acetate. A modification is described in which rayon fibres are used instead of certain of the wires, the fibres being burnt out by the heat treatment to provide a hollow ferrite structure through which pluralities of metallic conductors are later threaded.

    4.
    发明专利
    未知

    公开(公告)号：DE1564212A1

    公开(公告)日：1970-11-26

    申请号：DE1564212

    申请日：1966-12-16

    Applicant: IBM

    Inventor： ALFRED BARTKUS EDWARD ,  MERRITT BROWNLOW JAMES ,  RUDOLPH GREBE KURT

    IPC: H01F10/10 ,  H01F10/20 ,  H01F41/02

    Abstract: 1,137,288. Magnetic data-storage apparatus. INTERNATIONAL BUSINESS MACHINES CORP. 10 Nov., 1966 [23 Dec.; 1965], No. 50346/66. Heading H3B. [Also in Divisions D1 and H1] A storage device is produced by forming a layer of green magnetic ferrite around a cylindrical substrate, surrounding this layer with a green non-magnetic ferrite, slicing both ferrites, and sintering the slices. The magnetic ferrite may be Fe 1 . 62 Mn 0 . 80 Cu 0 . 45 Zn 0 . 10 Bi 0 . 02 La 0 . 01 O 4 and may be prepared by ball-milling a mixture of Fe, Cu, Zn and Bi oxides, MnCO 3 , and LaFeO 3 , passing it through a 20-mesh screen, calcining at 650‹ C., remilling, passing it through a 325-mesh screen, and drying. The non-magnetic ferrite may be Fe 1 . 2 Mn 0 . 78 Cu 0 . 3 Zn 0 . 7 Bi 0 . 02 0 4 or Fe 0 . 8 Mn 1 . 48 Cu 0 . 2 Zn 0 . 5 Bi 0 . 02 O 4 . A barrier layer, e.g. of Mn 3 O 4 , Cr 2 O 3 , Mn 3 O 4 + Cr 2 O 3 or Mn 3 O 4 +ZnO, may be provided between the two ferrites. The substrate may be a nylon filament which may be coated with a release agent, e.g. colloidal wax in water, and removed by pulling from one end. The magnetic and barrier layers may be applied by passing a continuous length of the filament through a suspension of the material and then passing it twice through an oven (at 70‹ and 80‹ C., using a nitrocellulose-amyl acetate solution, and at 100‹ and 110‹ C., using an epoxy resin solution); this process is repeated five times and the filament is then passed through an oven (at 85‹ or 125‹ C. resp.) 10 times. The structure may then be similarly coated with the non- magnetic ferrite, and a number of such structures cast in a wax or polyethylene block; the filament is then removed, the block sliced, and the wax melted off by heating to 100- 125‹ C. Alternatively, the structures may be cast in a block of the non-magnetic ferrite, which is dried at 90‹ C. in the mould and then at 100‹ C.; the filament is removed; and the block is then sliced either perpendicular to or along the axes of the cores (in the latter case the two halves are turned through 90 degrees before firing). Firing may be effected in a Ni boat coated with Mn 3 O 4 , initially at 600‹ C. to drive off the binder, and then at 920‹ C. The magnetic layer may have an inner diameter of 3 or 4À5 mils.

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