公开(公告)号：US3881190A

公开(公告)日：1975-04-29

申请号：US39921873

申请日：1973-09-20

Applicant: IBM

Inventor： BROCK GEORGE W ,  SHELLEDY FRANK B ,  SMITH SIDNEY H ,  WILLS ARTHUR B

IPC: G11B5/33 ,  G11B5/39 ,  G11B5/16 ,  G11B5/22

CPC classification number: G11B5/39 ,  G11B5/332

Abstract: A magnetoresistive (MR) head with an unusually desirable spatial resolution includes a shield on each side of the MR element. Information is carried on a magnetizable medium as recorded magnetic areas. The shields are spaced apart by a distance on the order of and less than the shortest recorded wavelength for which the head is meant to be used. The MR element and the shields have their edges nearest the medium in a common plane perpendicular to the vertical component of a signal from the recorded area. An additional shunt bias layer may be provided immediately adjacent and coextensive the MR element, and the head may serve one or many tracks.

Abstract translation: 具有异常期望的空间分辨率的磁阻（MR）头包括在MR元件的每一侧上的屏蔽。 信息在可磁化介质上作为记录磁区进行。 屏蔽物隔开一定距离并且小于头部意图使用的最短记录波长的距离。 MR元件和屏蔽件在垂直于来自记录区域的信号的垂直分量的公共平面中具有最靠近介质的边缘。 附加的分流偏置层可以紧邻MR元件并且共同延伸，并且头可以用于一个或多个轨道。

公开(公告)号：CA1147054A

公开(公告)日：1983-05-24

申请号：CA356280

申请日：1980-07-16

Applicant: IBM

Inventor： ARTER NELSON K ,  DEVORE ERNEST W ,  WILLS ARTHUR B ,  ZELENKA LESLIE R

IPC: G11B5/55 ,  G11B5/008 ,  G11B5/012 ,  G11B5/09 ,  G11B5/265 ,  G11B5/53 ,  G11B15/087 ,  G11B15/12 ,  G11B15/60 ,  G11B20/12 ,  G11B23/00 ,  G11B27/30 ,  G11B27/32 ,  G11B21/08 ,  G11B5/12

Abstract: BUFFERED RECORDING A forward/backward compatible apparatus and record member achieves multiple density by multiple track widths as well as multiple lineal densities. In a rotating head recorder a single head has a wide write gap followed by a plurality of narrow read gaps. In recording, narrower tracks--i.e., higher densities, the record medium is moved less than the width of the write gap for recording narrower tracks. The narrower tracks have the same width as the trailing read gaps. During readback, all read gaps are simultaneously operative. Signals from one of the read gaps are processed immediately, while signals from the remaining read gaps are buffered until a dead time occurs, such signals are then processed. The same principles are applicable to magnetic card and magnetic disk recorders. A record member of the disclosure employs a table of contents area always recorded at the lower density--i.e., widest track. The table of contents contains indicia indicating the track density as well as the lineal density of the other recording areas. The buffering also is employed to overlap seeks in a disk file for greater data accessibility. TU879003

公开(公告)号：CA1005572A

公开(公告)日：1977-02-15

申请号：CA151339

申请日：1972-09-11

Applicant: IBM

Inventor： CHOW TSENG K ,  WILLS ARTHUR B

IPC: G11B5/10 ,  G11B5/48 ,  G11B15/58 ,  G11B15/64

公开(公告)号：CA1038493A

公开(公告)日：1978-09-12

申请号：CA206207

申请日：1974-08-02

Applicant: IBM

Inventor： BROCK GEORGE W ,  SHELLEDY FRANK B ,  SMITH SIDNEY H ,  WILLS ARTHUR B

IPC: G11B5/33 ,  G11B5/39 ,  G11B5/16 ,  G11B5/22

Abstract: A magnetoresistive (HR) head with an unusually desirable spatial resolution includes a shield on each side of the MR element. Information is carried on a magnetizable medium as recorded magnetic areas. The shields and spaced apart by a distance on the order of and less than the shortest recorded wavelength for which the head is meant to be used. The HR element and the shields have their edges nearest the medium in a common plane perpendicular to the vertical component of a signal from the recorded area. An additional shunt bias layer may be provided immediately adjacent and coextensive the MR element, and the head may serve one or many tracks.