Method for manufacturing a magnetic head
    22.
    发明授权
    Method for manufacturing a magnetic head 失效
    磁头制造方法

    公开(公告)号:US5718036A

    公开(公告)日:1998-02-17

    申请号:US438548

    申请日:1995-05-10

    摘要: A method for manufacturing a magnetic head includes the process by which a curved sliding surface of a head chip for making contact with a recording medium and a penetrating window of a side surface of the head chip for determining a gap depth are formed by machining the head chip using a laser beam. The method includes placing the head chip on a working stage; placing a first mask in a light path of a laser beam from a laser source toward the side surface, the first mask being provided with a first slit for the purpose of forming the curved sliding surface of the head chip and a second slit for the purpose of forming the penetrating window of the side surface of the head chip; and irradiating the side surface through the first and second slits with the laser beam, thereby forming the curved sliding surface and the penetrating window in the head chip. The method also may include forming track grooves by irradiating the sliding surface of the head chip with the laser beam.

    摘要翻译: 一种制造磁头的方法包括以下步骤,通过该方法通过加工头部来形成用于与记录介质接触的头部芯片的弯曲滑动表面和用于确定间隙深度的头部芯片的侧表面的穿透窗口 芯片使用激光束。 该方法包括将头部芯片放置在工作台上; 将第一掩模放置在来自激光源的激光束的光路中朝向侧表面,第一掩模设置有用于形成头部芯片的弯曲滑动表面的第一狭缝和用于该目的的第二狭缝 形成头芯片的侧表面的穿透窗; 并用激光束照射通过第一和第二狭缝的侧表面,从而在头芯片中形成弯曲的滑动表面和穿透窗口。 该方法还可以包括通过用激光束照射头部芯片的滑动表面来形成轨道槽。

    Process for producing porous films involving a stretching step and the
resultant product
    23.
    发明授权
    Process for producing porous films involving a stretching step and the resultant product 失效
    涉及拉伸工序的多孔膜的制造方法和所得产物

    公开(公告)号:US4705812A

    公开(公告)日:1987-11-10

    申请号:US681914

    申请日:1984-12-14

    摘要: A process for producing porous films which comprises melting a resin composition consisting essentially of (1) 100 parts by weight of a high-pressure-processed low-density polyethylene resin having a melt index of 0.5 to 7 and a density of 0.915 to 0.935, a linear low-density polyethylene resin having a melt index of 0.5 to 8.5 and a density of 0.915 to 0.935, or a mixture thereof and (2) 50 to 500 parts by weight of barium sulfate having an average particle diameter of 0.1 to 7 .mu.m; forming the molten resin composition into a film; and then stretching the film at least uniaxially by a factor of 1.5 to 7. As the linear low-density polyethylene resin, a copolymer of ethylene and hexene and/or octene is particularly preferred.

    摘要翻译: 一种多孔膜的制造方法,其特征在于,使树脂组合物熔融,所述树脂组合物主要由(1)100重量份熔融指数为0.5〜7,密度为0.915〜0.935的高压处理低密度聚乙烯树脂组成, 熔融指数为0.5〜8.5,密度为0.915〜0.935的线性低密度聚乙烯树脂,或其混合物,(2)50〜500重量份的平均粒径为0.1〜7μm的硫酸钡 m; 将所述熔融树脂组合物形成膜; 然后将膜至少单轴拉伸1.5至7倍。作为线性低密度聚乙烯树脂,特别优选乙烯和己烯和/或辛烯的共聚物。