公开(公告)号：EP0033236A3

公开(公告)日：1982-03-10

申请号：EP81300315

申请日：1981-01-23

Applicant: SPERRY CORPORATION

Inventor： Chi, Chao Shu

IPC: G11B05/00 ,  G11B05/12 ,  G11B05/30

CPC classification number: G11B5/1278 ,  G11B5/02 ,  G11B5/39 ,  G11B15/125

Abstract: Apparatus for perpendicular magnetic recording on a moving magnetic medium (14) is designed to provide a low reluctance return path for the magnetic recording flux. The recording head comprises a core (10) of magnetic material carrying a coil (W1), the core having a narrow recording limb (11),and a flux return limb (12) having a much greater cross sectional area. A return path for the magnetic flux is provided on the other side of the magnetic medium (14) and this may comprise either a similar head (10') or a high permeability substrate on which the medium is deposited. The magnetic medium (14) moves in such a direction that it passes first under the flux return limb (12) and then underthe recording limb (11). For reading the recorded information a sub-core (16) carrying a winding (W3) is attached to the flux return limb (12) and is separated by a gap from the tip of the recording limb (15) so as to form with the core a ring-type reading head. This is rendered inoperative during recording by supplying to the winding (W3) a sufficient current to saturate the sub-core. An alternative method of reading employs magneto-resistive elements within the space between the recording limb (11) and the flux return limb (12) arranged to sense flux variations from the recording medium (14).

Abstract translation: 用于在移动磁介质（14）上垂直磁记录的装置被设计成为磁记录磁通提供低磁阻返回路径。 记录头包括承载线圈（W1）的磁性材料的芯（10），该芯具有窄记录肢（11），以及具有大得多横截面积的磁通返回分支（12） 。 用于磁通的返回路径设置在磁介质（14）的另一侧上，并且其可以包括类似的头（10分钟）或介质沉积在其上的高渗透性基底。 磁性介质（14）沿其通过首先在磁通返回分支（12）之下然后在记录分支（11）下面的方向移动。 ...为了读取记录信息，携带绕组（W3）的子芯（16）附接到磁通返回分支（12），并与记录分支（15）的尖端间隔一定距离 与核心形成一个环型阅读头。 这在记录期间通过向绕组（W3）供应充足的电流以使副芯饱和来使其不工作。 另一种读取方法在记录肢体（11）和通量返回肢体（12）之间的空间内采用磁阻元件，该磁通返回支路（12）布置成感测来自记录介质（14）的磁通量变化。