Method for the manufacture of planar magnetic heads by making cavities
in a non-magnetic wafer
    3.
    发明授权
    Method for the manufacture of planar magnetic heads by making cavities in a non-magnetic wafer 失效
    通过在非磁性晶片中制造空腔来制造平面磁头的方法

    公开(公告)号:US5067230A

    公开(公告)日:1991-11-26

    申请号:US541331

    申请日:1990-06-21

    IPC分类号: G11B5/127 G11B5/187 G11B5/31

    摘要: A method of simultaneous manufacture of a plurality of planar magnetic heads on a wafer or a slab made of non-magnetic material designed to be cut out to separate each head. The method can be applied to magnetic heads of the type including a micro-gap formed between two magnetic poles, facing a gap defined between two wire-wound ferrite cores. The method consists in depositing said thin layer magnetic poles on a first face of a wafer made of non-magnetic material and in hollowing out, in the face opposite to said wafer, at least one cavity for housing said wire-wound cores so as to obtain a calibrated spacing or a junction between the upper part of each of said wire-wound cores and said thin layer magnetic poles.

    摘要翻译: 在由非磁性材料制成的晶片或平板上同时制造多个平面磁头的方法,该非磁性材料设计成被切出以分离每个磁头。 该方法可以应用于包括形成在两个磁极之间的微间隙的类型的磁头,面对两个绕线铁氧体磁心之间的间隙。 该方法包括将所述薄层磁极沉积在由非磁性材料制成的晶片的第一面上,并且在与所述晶片相对的表面中空出,至少一个用于容纳所述绕线芯的空腔,以便 获得每个所述绕线芯的上部和所述薄层磁极之间的校准间隔或接合点。

    Method for the production of a read-write magnetic head
    4.
    发明授权
    Method for the production of a read-write magnetic head 失效
    一种读写磁头的制造方法

    公开(公告)号:US5123156A

    公开(公告)日:1992-06-23

    申请号:US566345

    申请日:1990-08-22

    摘要: A magnetic head and a method for producing the magnetic head comprising the steps of:producing a groove in a first face of a substrate;depositing a material having good magnetic characteristics on the walls of the groove;depositing a non-magnetic material in the groove over the material having good magnetic characteristics;machining a second face of the substrate until the non-magnetic material is reached, so as to create a magnetic gap; andbonding a part carrying a magnetic layer onto the first face of the substrate so as to form a magnetic circuit.

    摘要翻译: PCT No.PCT / FR89 / 00657 Sec。 371日期1990年8月22日 102(e)1990年8月22日PCT PCT 1989年12月15日PCT公布。 第WO90 / 07772号公报 日本1990年7月12日。一种磁头及其制造方法,其特征在于,包括:在基板的第一面上形成槽; 在槽的壁上沉积具有良好磁特性的材料; 在具有良好磁特性的材料上的凹槽中沉积非磁性材料; 加工衬底的第二面,直到达到非磁性材料,从而产生磁隙; 以及将承载有磁性层的部分接合到所述基板的第一面上,以形成磁路。

    Method for achieving the planar surface of an active face for a magnetic
recording/reading head
    5.
    发明授权
    Method for achieving the planar surface of an active face for a magnetic recording/reading head 失效
    用于实现磁记录/读取头的有源面的平面的方法

    公开(公告)号:US4939835A

    公开(公告)日:1990-07-10

    申请号:US366954

    申请日:1989-06-16

    IPC分类号: G11B5/187

    摘要: A method for achieving the planar surface of an active face for magnetic recording/reading heads. The planar surface of the active face is obtained by grinding, the active face being of the type where, before the grinding operation, the level of the material forming the gap is recessed with respect to the magnetic poles, the method comprising depositing over the recess a thin layer of non-magnetic material with a thickness at least equal to the recess of the gap. The non-magnetive thin layer may then be ground to obtain the planar surface of the active face.

    摘要翻译: 一种用于实现磁记录/读取头的有源面的平面的方法。 有源面的平面是通过研磨获得的,所述有源面是在研磨操作之前,形成间隙的材料的高度相对于磁极凹陷的方式,所述方法包括在所述凹部 薄层的非磁性材料,其厚度至少等于间隙的凹槽。 然后可以研磨非磁性薄层以获得活性面的平面。

    Elastic surface wave accelerometers
    10.
    发明授权
    Elastic surface wave accelerometers 失效
    弹性表面波加速度计

    公开(公告)号:US4515016A

    公开(公告)日:1985-05-07

    申请号:US505174

    申请日:1983-06-17

    CPC分类号: G01P15/0975

    摘要: An elastic surface wave accelerometer having a deformable structure, fixed at one end and providing at its free end a seismic mass. The deformable structure may be an open frame with a single post or a closed frame with two posts. The accelerometer can measure movement of a missile or that of a gravitational field.

    摘要翻译: 具有可变形结构的弹性表面波加速计,固定在一端并在其自由端提供抗震块。 可变形结构可以是具有单个柱的开放框架或具有两个柱的封闭框架。 加速度计可以测量导弹或重力场的运动。