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    Microfile
    3.
    发明公开
    Microfile 失效
    微文件

    公开(公告)号：EP0732695A3

    公开(公告)日：1998-10-07

    申请号：EP96102037

    申请日：1996-02-13

    Applicant: IBM

    Inventor： CHAINER TIMOTHY J ,  ROMANKIW LUBOMYR T

    IPC: G11B19/20 ,  G11B25/04 ,  G11B33/12 ,  H02K19/10 ,  H02K29/06 ,  H02K41/035

    CPC classification number: H02K19/103 ,  G11B19/2009 ,  G11B25/043 ,  H02K29/06 ,  H02K41/0354 ,  H02K99/00

    Abstract: An integrated microfile includes a rotatably supported magnetic disk for storing data and a micromotor for rotating the disk. The micromotor includes a rotor fixedly joined to the disk and having a plurality of rotor poles. A stator includes a plurality of stator poles positioned around the rotor for sequentially cooperating with respective ones of the rotor poles for rotating the rotor to rotate the disk. A selectively movable access head is disposed adjacent to the disk for selectively addressing the data on the disk. The microfile may be fabricated using lithographic and electroplating techniques in subform-factor sizes in an exemplary embodiment.

    Process for electrolessly plating magnetic thin films
    6.
    发明授权
    Process for electrolessly plating magnetic thin films 失效
    电镀薄膜薄膜的工艺

    公开(公告)号：US3702263A

    公开(公告)日：1972-11-07

    申请号：US3702263D

    申请日：1970-02-20

    Applicant: IBM

    Inventor： HALL DAVID W ,  LINDHOLM JOHN A ,  ROMANKIW LUBOMYR T ,  SCHMECKENBECHER AINOLD F

    IPC: C23C18/36 ,  C23C18/50 ,  H01F41/24 ,  H01F10/00

    CPC classification number: H01F41/24 ,  C23C18/36 ,  C23C18/50 ,  Y10S428/928 ,  Y10S428/936 ,  Y10T428/12979

    Abstract: A PROCESS FOR ELECTROLESSLY PLATING SUBSTRATES WITH THIN FILMS OF MAGNETIC MATERIAL WHICH IS CARRIED OUT IN A TEMPERATURE RANGE WHICH INCLUDES ROOM TEMPERATURE. THE PROCESS INCLUDES THE IMMERSION OF SUBSTRATE IN AN AQUEOUS SOLUTION WHICH CONTAINS IRON IONS AND AT LEAST ANOTHER METAL ION SUCH AS NICKEL, WHICH UPON DEPOSITION FORM THE MAGNETIC MATERIAL. A REDUCING AGENT SUCH AS SODIUM HYPOPHOSPHITE IS PROVIDED IN THE BATH IN AN AMOUNT SUFFICIENT TO CAUSE DEPOSITION OF THE METALS IN SMALL GRAIN SIZES. SUFFICIENT HYDROXYL IONS ARE ALSO PROVIDED TO MAINTAIN THE BATH IN CONDITIONS WHICH RANGE FROM SLIGHTLY ACIDIC TO HIGHLY ALKALINE. THE BATH IS THEN MAINTAINED IN A TEMPERATURE RANGE WHICH INCLUDES ROOM TEMPERATURE OVER WHICH RANGE THIN FILMS HAVING A CHARACTERISTIC SILVERY FINISH INDICATIVE OF SMALL GRAIN SIZE ARE PRODUCED. THE PROCESS ALSO INCLUDES THE STEP OF AGING A FERROUS BATH FOR A PERIOD OF TIME SUFFICIENT TO CONVERT THE FERROUS IONS TO STABILIZE THE BATH. THE ABOVE-MENTIONED CONSTITUENTS AND OTHER COMPLEXING AND BUFFERING AGENTS WHICH PREVENT THE PRECIPITATION OF THE METALS FROM SOLUTION ARE PRESENT IN THE SOLUTION IN SELECTED CONCENTRATIONS WHICH PERMIT THE PLATING OF SMALL GRAIN SIZE MAGNETIC FILMS AT LOW TEMPERATURE.

    Micro-circuit device
    7.
    发明授权
    Micro-circuit device 失效
    微电路设备

    公开(公告)号：US3602635A

    公开(公告)日：1971-08-31

    申请号：US3602635D

    申请日：1970-06-30

    Applicant: IBM

    Inventor： ROMANKIW LUBOMYR T

    IPC: H01F10/06 ,  H01L27/00 ,  H05K3/46 ,  H05K1/02

    CPC classification number: H05K3/4685 ,  H01F10/06 ,  H01L27/00 ,  Y10T29/49069

    Abstract: A microcircuit device such as a printed circuit or an integrated circuit is described wherein the thickness of insulation between two crossing conductive bodies can be substantially decreased as compared to the corresponding thickness in known like devices. In the case for example, such as magnetic coupled film memory devices wherein a low temperature insulating material can be employed and wherein such insulating material is subject to surface tension effects, this is achieved by retaining the photoresist layer on the surface of the metal magnetic bodies resting on the substrate and etching the magnetic bodies to the point where the width of the upper surfaces of the conducting bodies are equal to the width of the nonconductive resist used in the etching or where there is a slight undercut under their retained respective photoresist layers, i.e., the layer on each body extends beyond the perimeter of the surface of the bodies. Such photoresist layer protects sharp metal corners or, in the latter case, provides an umbrella effect in that it extends beyond the sharp edges of the magnetic bodies, the latter being potential areas for electrical shorts. In the case where conductive bodies are employed which generate high temperatures or which have to withstand high service temperatures and wherein correspondingly high temperature insulating materials have to be used or in which it is desired to have very thin hard insulations such as are produced in the use of inorganic insulations, glasses and the like, the aforementioned ''''umbrella'''' effect is provided by a layer of high temperature insulating materials of organic or inorganic compositions on the conducting body''s surface rather than the layer of photoresist material. In this latter case, the insulation thickness can be much thinner than the commonly accepted rule of thumb thickness which is twice that of the conducting bodies for conducting bodies of 30000A. or thicker and even greater such as four or five to one for conducting bodies considerably thinner than 3000A. (for example, 200 to 500A. thick).

    Thin film magnetic transducer head
    9.
    发明授权
    Thin film magnetic transducer head 失效
    薄膜磁性传感器头

    公开(公告)号：US3662119A

    公开(公告)日：1972-05-09

    申请号：US3662119D

    申请日：1970-06-30

    Applicant: IBM

    Inventor： ROMANKIW LUBOMYR T ,  WARDLY GEORGE A

    IPC: G11B5/17 ,  G11B5/31 ,  G11B5/12 ,  G11B5/42

    CPC classification number: G11B5/17 ,  G11B5/31 ,  G11B5/313 ,  Y10T29/49044 ,  Y10T29/49064

    Abstract: A rectangular thin film transducer head includes a magnetic core composed of overlapping laminations of permalloy film joined together magnetically and electrically, near an air gap, at one end of the rectangle, between the two laminations, which gap couples flux to the magnetic recording medium. Two electrically parallel insulated thin film copper windings starting at the end opposite the gap are deposited about the core joining electrically at the end adjacent to the gap to a conductor coupled to both permalloy laminations which conduct return current through the legs of the core inside of the windings. Alternatively, a single series winding passes around the core and through the gap. The head is manufactured by means of photolithographic, vacuum, and thin film techniques.

    Abstract translation: 矩形薄膜换能器头包括由磁力和电气连接在一起的坡莫合金膜的重叠叠层组成的磁芯，靠近在两个叠片之间的矩形的一端的气隙，该间隙将磁通耦合到磁记录介质。 在与间隙相对的端部处开始的两个电并联绝缘薄膜铜绕组围绕磁芯在与邻近间隙的端部处电连接地沉积到耦合到两个坡莫合金叠片的导体上沉积，导体通过芯的内部的引线 绕组。 或者，单个串联绕组绕过芯并穿过间隙。 头部通过光刻，真空和薄膜技术制造。

    Method for controlling properties of magnetic film
    10.
    发明授权
    Method for controlling properties of magnetic film 失效
    控制磁膜特性的方法

    公开(公告)号：US3573193A

    公开(公告)日：1971-03-30

    申请号：US3573193D

    申请日：1968-12-04

    Applicant: IBM

    Inventor： POWERS JOHN V ,  ROMANKIW LUBOMYR T

    IPC: H01F10/06 ,  C23F17/00 ,  C23B5/34

    CPC classification number: H01F10/06

    Abstract: A METHOD FOR CONTROLLING MAGNETIC PROPERTIES OF MAGNETIC FILMS BY CONTROLLING THE ROUGHNESS OF THE SUBSTRATE SURFACE ONTO WHICH THE MAGNETIC FILM IS DEPOSITED. ON ONE HAND THE COERCIVITY MAY BE VARIED ALTHOUGH THE MAGNETIC FILM THICKNESS IS BEING KEPT CONSTANT, ON THE OTHER HAND CONSTANT VALUES OF COERCIVITY CAN BE OBTAINED EVEN THOUGH THE THICKNESS OF THE MAGNETIC FILM MAY VARY. THE SUBSTRATE CONSISTS OF A CONDUCTIVE GROUND PLATE COATED WITH A THIN LAYER OF INSULATING MATERIAL AND THEREAFTER COPPER PLATED. PRIOR TO THE DEPOSITION OF THE MAGNETIC FILM, THE COPPER SURFACE IS TREATED BY ELECTRO PULSE PLATING INCLUDING REVERSE PULSING TO OBTAIN A WELL DEFINED AND CONTROLLED SURFACE ROUGHNESS.

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