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1.发明授权
公开(公告)号：US3680065A
公开(公告)日：1972-07-25
申请号：US3680065D
申请日：1970-05-25
Applicant: IBM
Inventor： ALMASI GEORGE S , GENOVESE EUGENE R
CPC classification number: G11C13/06
Abstract: A magneto-optical memory element for use as a light beam addressable memory element is formed of permalloy and europium oxide films arranged in adjoining layers. Information is written into the permalloy layer while the device is at room temperature. The ambient temperature is then reduced below the Curie point of europium oxide causing the magnetization of the permalloy layer to be directly transferred by negative or anti-parallel exchange coupling to the europium oxide layer. The europium oxide then preserves the stored information in a form suitable for optical read-out which will take place at this low temperature. The device has the advantage that if the ambient temperature accidentally should rise above the Curie point of europium oxide going even as high as room temperature, the stored information will be preserved in the permalloy film until the temperature again is brought below the Curie point of europium oxide. Whereupon the europium oxide film is restored to its previous magnetic state by negative exchange coupling. Thus, the subject magneto-optical memory device is nonvolatile under fluctuating temperature conditions.
Abstract translation: 用作光束可寻址存储元件的磁光存储元件由邻接层布置的坡莫合金和氧化铕膜形成。 当设备处于室温时，信息写入坡莫合金层。 然后将环境温度降低到低于氧化铕的居里点，导致坡莫合金层的磁化通过负极或反平行交换耦合直接转移到氧化铕层。 然后，氧化铕以适合于在该低温下发生的光学读出的形式保存所存储的信息。 该装置的优点是，如果环境温度意外上升到高于室温的氧化铕的居里点，则存储的信息将保存在坡莫合金膜中，直到温度再次低于铕的居里点 氧化物。 于是通过负交换耦合将氧化铕膜恢复到其先前的磁状态。 因此，本体磁光存储器件在波动的温度条件下是非挥发性的。
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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
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。
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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
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。
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公开(公告)号：CA1130001A
公开(公告)日：1982-08-17
申请号：CA313157
申请日：1978-10-11
Applicant: IBM
Inventor： ALMASI GEORGE S , LIN YEONG S
Abstract: CONTIGUOUS ELEMENT FIELD ACCESS BUBBLE LATTICE FILE A bubble domain storage system is described which has the best features of contiguous element bubble propagation systems and bubble lattice file systems. An array of magnetic bubble domains, such as a lattice, is moved along contiguous propagation patterns in response to the reorientation of a magnetic field in the plane of the bubble domain film. Adjacent rows of bubble domains in the array move in opposite directions to provide individual storage loops within the array. Information accessing can be achieved by the use of input/output registers similar to those used in other contiguous disk bubble domain storage systems. For example, the storage system can be a conventional major/minor loop organization using contiguous element propagation patterns for the storage registers and for the input/output registers. Every bit position in the storage registers is populated by a bubble domain where the average distance between adjacent bubble domains is less than that in a system where bubbles are isolated from one another. For example, the storage registers can be arranged so that the separation between adjacent bubble domains in the storage registers is 2-3 bubble diameters. The bubbles are coded in terms of the magnetic properties of individual bubble domains, or a double layer structure can be used in which an array of bubble domains is in one layer and information bubble domains are in the other layer, coded in accordance with presence/ absence. Viewed another way, the invention is a bubble storage system using contiguous propagation elements which is fully populated by interacting bubble domains. YO977-032 -1-
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公开(公告)号：CA1003959A
公开(公告)日：1977-01-18
申请号：CA163170
申请日：1973-01-31
Applicant: IBM
Inventor： ALMASI GEORGE S
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Patent Agency Ranking
公开(公告)号：FR2360152A1
公开(公告)日：1978-02-24
申请号：FR7718263
申请日：1977-06-09
Applicant: IBM
Inventor： ALMASI GEORGE S , BOGHOLTZ WILHELM E , KEEFE GEORGE E
Abstract: The magnetic bubble domain memory includes a transfer device for transferring domains from a first register to a second register, or back to the first register. The transfer device includes at least one Y shaped magnetic element, with one transfer path defined by both arms of the Y and the other transfer path defined by one arm and the stem of the Y. A conductor crosses the transfer path along the stem of the Y, with current selectively passed through the the conductor to determine the transfer path. The magnetic element comprises a soft magnetic layer, with the conductor between this and the magnetic support containing the domains.
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公开(公告)号：DE2215899A1
公开(公告)日：1973-10-25
申请号：DE2215899
申请日：1972-04-01
Applicant: IBM
Inventor： KEEFE GEORGE E , ALMASI GEORGE S
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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
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.
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公开(公告)号：FR2413755A1
公开(公告)日：1979-07-27
申请号：FR7834440
申请日：1978-11-30
Applicant: IBM
Inventor： ALMASI GEORGE S , LIN YEONG S
Abstract: A bubble domain storage system is described which has the best features of contiguous element bubble propagation systems and bubble lattice file systems. An array of magnetic bubble domains, such as a lattice, is moved along contiguous propagation patterns in response to the reorientation of a magnetic field in the plane of the bubble domain film. Adjacent rows of bubble domains in the array move in opposite directions to provide individual storage loops within the array. Information accessing can be achieved by the use of input/output registers similar to those used in other contiguous disk bubble domain storage systems. For example, the storage system can be a conventional major/minor loop organization using contiguous element propagation patterns for the storage registers and for the input/output registers. Every bit position in the storage registers is populated by a bubble domain where the average distance between adjacent bubble domains is less than that in a system where bubbles are isolated from one another. For example, the storage registers can be arranged so that the separation between adjacent bubble domains in the storage registers is 2-3 bubble diameters. The bubbles are coded in terms of the magnetic properties of individual bubble domains, or a double layer structure can be used in which an array of bubble domains is in one layer and information bubble domains are in the other layer, coded in accordance with presence/absence. Viewed another way, the invention is a bubble storage system using contiguous propagation elements which is fully populated by interacting bubble domains.
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公开(公告)号：CA961156A
公开(公告)日：1975-01-14
申请号：CA138504
申请日：1972-03-29
Applicant: IBM
Inventor： ALMASI GEORGE S , KEEFE GEORGE E
IPC: G11C19/08
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