公开(公告)号：US3689902A

公开(公告)日：1972-09-05

申请号：US3689902D

申请日：1971-06-30

Applicant: IBM

Inventor： CHANG HSU ,  KEEFE GEORGE E ,  LIN YEONG S ,  ROSIER LAURENCE L

IPC: G11C19/08 ,  H03M7/00 ,  G11C11/14 ,  G11C19/00

CPC classification number: G11C19/0875 ,  H03M7/002

Abstract: A decoder for cylindrical magnetic domain shift registers having means to clear the information from selected registers thus enabling new information to be written into those registers. The decoder is incorporated into 2N closed loop shift registers and uses only a small part of the storage area of the magnetic sheet in which domains exist. It is activated by 2N control lines (N pairs). Depending upon the activation of the decoder, the information in a selected shift register is passed to a clear means which sends it into one of two paths depending upon the activation of the clear means. One path brings the information to a detector for destructive readout, while the other path brings the information to a domain splitter. The domain splitter splits the input domains into two parts, one of which propagates to the detector while the other returns to the proper shift register. Thus, non-destructive readout (NDRO) or destructive read-out (DRO) is provided depending upon the activation of the clear means.

Abstract translation: 用于圆柱形磁畴移位寄存器的解码器具有从所选择的寄存器清除信息的装置，从而使新信息能够写入这些寄存器。 解码器被并入2N闭环移位寄存器中，并且仅使用存在域的磁性片的存储区域的一小部分。 它由2N个控制线（N对）激活。 根据解码器的激活，所选择的移位寄存器中的信息被传递到清除装置，根据清除装置的激活将其发送到两个路径之一。 一条路径将信息提供给检测器以进行破坏性读出，而另一条路径将信息带到域分割器。 域分配器将输入域分成两部分，其中一个传播到检测器，而另一个返回到适当的移位寄存器。 因此，根据清除装置的激活，提供非破坏性读出（NDRO）或破坏性读出（DRO）。

公开(公告)号：US3691540A

公开(公告)日：1972-09-12

申请号：US3691540D

申请日：1970-10-06

Applicant: IBM

Inventor： ALMASI GEORGE S ,  CHANG HSU ,  KEEFE GEORGE E ,  THOMPSON DAVID A

IPC: G11C11/14 ,  G11C19/08

CPC classification number: G11C19/0866

Abstract: An integrated magneto-resistive sensor for detection of magnetic bubble domains. The sensor is located on the chip in which the bubble domains propagate and can be an integral part of the propagation circuitry. Any material exhibiting a magnetoresistive effect can be used, and permalloy is a preferred material. The sensing element can be made very small, and has a length which is usually about equal to a bubble domain diameter.

Abstract translation: 用于检测磁性气泡域的集成磁阻传感器。 传感器位于气泡区域传播的芯片上，并且可以是传播电路的组成部分。 可以使用具有磁阻效应的任何材料，坡莫合金是优选的材料。 感测元件可以制造得非常小，并且具有通常大约等于气泡直径的长度。

公开(公告)号：US3466640A

公开(公告)日：1969-09-09

申请号：US3466640D

申请日：1964-01-07

Applicant: IBM

Inventor： KEEFE GEORGE E ,  MIDDELHOEK SIMON

IPC: G11C7/02 ,  G11C11/14 ,  G11B5/78

CPC classification number: G11C7/02 ,  G11C11/14

公开(公告)号：US3456248A

公开(公告)日：1969-07-15

申请号：US3456248D

申请日：1966-05-04

Applicant: IBM

Inventor： DAUGHTON JAMES M ,  KEEFE GEORGE E

IPC: G11C7/00 ,  G11C11/15 ,  G11C11/10 ,  G11C5/08

CPC classification number: G11C7/00 ,  G11C11/15

公开(公告)号：US3551901A

公开(公告)日：1970-12-29

申请号：US3551901D

申请日：1967-07-14

Applicant: IBM

Inventor： KEEFE GEORGE E

IPC: G11C5/02 ,  G11C7/00 ,  C11C5/02

CPC classification number: G11C5/02 ,  G11C7/00

公开(公告)号：US3483534A

公开(公告)日：1969-12-09

申请号：US3483534D

申请日：1966-07-15

Applicant: IBM

Inventor： CASTELLANI EUGENE E ,  KEEFE GEORGE E ,  ROMANKIW LUBOMYR T

IPC: G11C11/15 ,  G11C17/02 ,  G11B5/00

CPC classification number: G11C11/15 ,  G11C17/02

公开(公告)号：US3914751A

公开(公告)日：1975-10-21

申请号：US42900173

申请日：1973-12-27

Applicant: IBM

Inventor： KEEFE GEORGE E ,  LIN YEONG S ,  ROSIER LAURENCE L

IPC: G11C11/14 ,  G11C19/08

CPC classification number: G11C19/0816

Abstract: A gapless, multithickness propagation structure is provided for implementing the continuous movement of magnetic bubble domains under the control of a reorienting in-plane field. Propagation is achieved by providing two parallel rows of H-shaped overlays of soft magnetic material in spaced-apart end-to-end relation adjacent to one surface of a magnetic medium having magnetic bubble domains therein. The ends of the H-shaped overlays in each row are connected to each other and the ends of the H-shaped overlays in the adjacent row by means of a transversely extending overlay strip having a thickness approximately one-half the thickness of the H-shaped overlays. High storage density, with a cell size 8W2 is obtained, where W is the line width of the elements in the structure.

Abstract translation: 提供无间隙的多点传播结构，用于在重新定向的平面场的控制下实现磁性气泡畴的连续运动。 传播是通过提供两个平行的软磁材料的H形覆盖层，其间隔开的端对端关系邻近其中具有磁性气泡畴的磁性介质的一个表面。 每行中的H形叠层的端部彼此连接，并且H形的端部通过横向延伸的覆盖带覆盖在相邻行中，其厚度大约为H的厚度的一半， 形状叠加。 获得高存储密度，单元尺寸为8W2，其中W是结构元件的线宽。

公开(公告)号：US3893089A

公开(公告)日：1975-07-01

申请号：US34751673

申请日：1973-04-03

Applicant: IBM

Inventor： ALMASI GEORGE S ,  KEEFE GEORGE E

IPC: G11C19/08 ,  G11C11/14 ,  G11C19/00

CPC classification number: G11C19/0841

Abstract: A two-phase conductor means for propagation of cylindrical magnetic domains (bubble domains) in an underlying magnetic medium, such as orthoferrite or garnet. By pulsing parallel conductors alternately with bi-polar pulses, propagation of domains in the magnetic material is achieved. Very small domains can be used with these conductors and fabrication is more simple than with conventional conductor loops. A bi-directional shift register having four conductors (connected in pairs) per stage is shown.

Abstract translation: 用于在下面的磁性介质（例如正铁或石榴石）中传播圆柱形磁畴（气泡畴）的两相导体装置。 通过用双极脉冲交替地脉冲平行导体，实现磁性材料中的畴的传播。 这些导体可以使用非常小的畴，并且制造比常规的导体环更简单。 示出了具有每个级的四个导体（成对连接）的双向移位寄存器。

公开(公告)号：CA1071760A

公开(公告)日：1980-02-12

申请号：CA238110

申请日：1975-10-20

Applicant: IBM

Inventor： KEEFE GEORGE E ,  KRYDER MARK H ,  LIN YEONG S

IPC: G11C11/14 ,  C10M159/20 ,  G11C19/08 ,  H01F10/00

Abstract: SINGLE SIDED, HIGH DENSITY BUBBLE DOMAIN PROPAGATION DEVICE A magnetic bubble domain propagation device which is single sided and can be used to move bubble domains in amorphous magnetic films. The propagation structure is comprised of either one or two layers located on a single side of the amorphous magnetic medium. Preferably, the propagation elements in each layer are contiguous to one another to provide maximum density. In a preferred embodiment, the propagation elements are circular, but other geometries can be used. The amorphous magnetic material is deposited over these underlayer propagation elements in order to create a change in the profile of the amorphous material. This change in profile of the amorphous material acts as a restraining barrier to bubble domain movement, so that the bubble domains will move along the proper channel without drifting to other propagation channels, and will move from one propagation element to the next without merely idling at any of the propagation elements.

公开(公告)号：CA1071759A

公开(公告)日：1980-02-12

申请号：CA238108

申请日：1975-10-20

Applicant: IBM

Inventor： ALMASI GEORGE S ,  HENDEL ROBERT J ,  KEEFE GEORGE E ,  LIN YEONG S ,  MCGOUEY RICHARD P

IPC: G11C11/14 ,  G11C19/08 ,  H01F10/10 ,  H01F41/14 ,  H01F41/34

Abstract: METHOD FOR MAKING HIGH DENSITY MAGNETIC BUBBLE DOMAIN SYSTEM A method for making a high density magnetic bubble domain system including the functions of read, write, storage, transfer, and annihilation. Only three masking steps are required, of which only one requires critical alignment. The process makes use of the fact that magnetic disks can be placed on non ion implanted regions without adversely affecting the propagation properties of the implanted regions. Thus, the magnetic disks can be used to define ion implantation masks as well as for providing functions such as generation, propagation, reading, and annihilation. Magnetic elements for generation, storage and propagation, reading and annihilation are deposited in the same non-critical masking step, while all conductors used for writing, reading, and transfer are deposited by a single masking step requiring critical alignment.