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    Magnetic head with printed circuit coil
    1.
    发明授权
    Magnetic head with printed circuit coil 失效
    带印刷电路线圈的磁头

    公开(公告)号：US3648264A

    公开(公告)日：1972-03-07

    申请号：US3648264D

    申请日：1968-09-30

    Applicant: TEXAS INSTRUMENTS INC

    Inventor： GRUCZELAK NORMAN P ,  PIERCE JOE T

    IPC: G11B5/127 ,  G11B5/17 ,  G11B5/20 ,  G11B5/42

    CPC classification number: G11B5/127 ,  G11B5/17

    Abstract: An array of read-write heads for a magnetic storage means, such as a disk or drum, is disclosed. Each head is comprised of a flux carrying means, such as a gapped ferrite loop and a fluxproducing means, such as a pair of coils inductively coupled to the loop. The coils, together with a portion of the associated addressing circuitry, are supported by a substrate. The halves of the ferrite loops that lie on opposite sides of the substrate are formed as separate ferrite parts. The halves of the ferrite loops are disposed on opposite sides of the coil assembly so that the halves of the loops mate through holes in the substrate and form the gapped ferrite loops. In one embodiment, the halves of the ferrite loops are partially formed on the faces of ferrite blocks which support the loop halves during fabrication. After the halves are assembled on opposite sides of the substrate, the excess material of the ferrite assemblies is cut away to leave the discrete ferrite loops and the associated coils embedded within a solid structure which also appropriately isolates the parts electrically and magnetically. In another embodiment, the halves of the ferrite loops are formed individually and supported by a ceramic housing during mating with the coil assembly and the other halves of the loops. The substrate can be an insulator, such as glass, in which case the coil circuitry can be a photographically patterned metal film and the addressing diodes discrete semiconductor devices. Or the substrate can be a semiconductor, in which case either the coils or the addressing diodes, or both, may be diffused in the sheet of semiconductor material. Or the substrate may be a selectably reducible material such as YIG or Ti02 in which conductive paths can be selectively formed in the substrate by a scanned energy beam. Or the substrate may be the face of a subassembly for holding either of the halves of the ferrite loops prior to final assembly, or coils may be formed on the faces of both subassemblies.

    Abstract translation: 公开了一种用于诸如磁盘或磁鼓的磁存储装置的读写头阵列。 每个磁头由磁通承载装置，例如有间隙的铁氧体环和助焊剂产生装置组成，例如一对电感耦合到环的线圈。 线圈与相关寻址电路的一部分一起被衬底支撑。 位于基板相对两侧的铁氧体环的一半形成为分离的铁氧体部分。 铁氧体环的一半设置在线圈组件的相对侧上，使得环的一半通过衬底中的孔配合并形成有间隙的铁氧体环。

    Method for fabricating magnetic read-write head array and product
    7.
    发明授权
    Method for fabricating magnetic read-write head array and product 失效
    制造磁性读写头阵列和产品的方法

    公开(公告)号：US3601871A

    公开(公告)日：1971-08-31

    申请号：US3601871D

    申请日：1968-09-30

    Applicant: TEXAS INSTRUMENTS INC

    Inventor： PIERCE JOE T

    IPC: G11B5/17 ,  G11B5/265 ,  G11B5/29 ,  G11B15/12 ,  H01F7/06

    CPC classification number: G11B15/12 ,  G11B5/17 ,  G11B5/2651 ,  G11B5/295 ,  Y10S428/90 ,  Y10T29/49048 ,  Y10T29/49055 ,  Y10T29/49066 ,  Y10T29/49787 ,  Y10T29/49813 ,  Y10T156/1075

    Abstract: A method for fabricating an array of read-write heads for a magnetic storage means, such as a disk or drum, is disclosed. Each head is comprised of a flux-carrying means, such as a gapped magnetic loop inductively coupled to a flux-producing means, such as a pair of coils. The coils, together with a portion of the associated addressing circuitry, are formed on a high resistivity substrate. The halves of the magnetic loops that lie on opposite sides of the coil assembly are fabricated in the relative position on two separate assemblies. The two assemblies are then bonded to opposite sides of the coil assembly so that the halves of the magnetic loops mate through holes in the substrate to form the complete gapped magnetic loops. The excess material of the assemblies is then cut away as required to leave magnetically isolated magnetic loops and the associated coils embedded within a solid body. The sensing gaps of the magnetic loops are formed by vacuum depositing a thin layer of nonmagnetic material on a face of one ferrite part, disposing a second ferrite part against the thin nonmagnetic layer and bonding the two ferrite parts together, taking a section of two ferrite parts normal to the nonmagnetic layer, and bridging the nonmagnetic layer with a third ferrite part to complete the magnetic loop. The loop assemblies may be formed by cutting grooves in the faces of ferrite blocks to form a number of ferrite mesas corresponding to the number of read-write heads. The grooves are then filled with a nonmagnetic material to magnetically isolate the ferrite mesas. The loop assemblies are then bonded to opposite sides of the coil assembly before being separated from the ferrite block. Alternatively, the ferrite assembly may be formed by laminating a layer of ferrite material, or two layers of ferrite material separated by a thin layer of nonmagnetic material for forming a sensing gap, between two layers of nonmagnetic material, slicing the layers in a plane normal to the layers to produce a number of slices each having a strip of ferrite disposed between strips of nonmagnetic material, then laminating these slices such that each strip of ferrite is isolated by nonmagnetic material. This laminated structure is again sliced normal to the last laminating joints to produce slices having individually isolated ferrite islands extending normal to the slice. Each ferrite island is then incorporated into a magnetic loop.

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