公开(公告)号：US07846563B2

公开(公告)日：2010-12-07

申请号：US12534181

申请日：2009-08-03

Applicant: Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Thomas Margulies

Inventor： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield, III ,  David Thomas Margulies

IPC: G11B5/127 ,  G11B5/00

CPC classification number: G11B5/82 ,  G11B5/02 ,  G11B5/66 ,  G11B2005/0005 ,  G11B2005/0029

Abstract: A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 may have a coupling layer (CL) located between them that permits ferromagnetic exchange coupling of MAG1 with MAG2. The LCL is located either above or below MAG1 and in direct contact with MAG1 and mediates an effective intergranular exchange coupling in MAG1. The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy in MAG1, which typically will include segregants such as oxides. The LCL is preferably free of oxides or other non-metallic segregants, which would tend to reduce intergranular exchange coupling in the LCL. Because the LCL grain boundaries overlay the boundaries of the generally segregated and decoupled grains of MAG1, and the LCL and MAG1 grains are strongly coupled perpendicularly, the LCL introduces an effective intergranular exchange coupling in the MAG1.

Abstract translation: 垂直磁记录系统和介质具有包括交换弹簧结构和铁磁横向耦合层（LCL）的多层记录层。 交换弹簧结构由两个铁磁交换磁性层（MAG1和MAG2）组成，每个具有垂直的磁各向异性。 MAG1和MAG2可以具有位于它们之间的耦合层（CL），其允许MAG1与MAG2的铁磁交换耦合。 LCL位于MAG1上方或下方，与MAG1直接接触，并介导MAG1中有效的晶间交换耦合。 LCL中的铁磁合金具有比MAG1中的铁磁合金显着更大的晶间交换耦合，其通常将包括分离子如氧化物。 LCL优选不含氧化物或其它非金属分离剂，其倾向于减少LCL中的晶间交换偶联。 因为LCL晶界覆盖了MAG1的大致分离和去耦晶粒的边界，并且LCL和MAG1晶粒垂直强耦合，所以LCL在MAG1中引入有效的晶间交换耦合。

公开(公告)号：US20080292907A1

公开(公告)日：2008-11-27

申请号：US11751823

申请日：2007-05-22

Applicant: Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  Ernesto E. Marinero

Inventor： Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  Ernesto E. Marinero

IPC: G11B5/66 ,  G11B5/706

CPC classification number: G11B5/66 ,  G11B5/65 ,  G11B5/855

Abstract: A patterned perpendicular magnetic recording medium has discrete magnetic islands, each of which has a recording layer (RL) structure that comprises two exchange-coupled ferromagnetic layers. The RL structure may be an “exchange-spring” RL structure with an upper ferromagnetic layer (MAG2), sometimes called the exchange-spring layer (ESL), ferromagnetically coupled to a lower ferromagnetic layer (MAG1), sometimes called the media layer (ML). The RL structure may also include a coupling layer (CL) between MAG1 and MAG2 that permits ferromagnetic coupling. The interlayer exchange coupling between MAG1 and MAG2 may be optimized, in part, by adjusting the materials and thickness of the CL. The RL structure may also include a ferromagnetic lateral coupling layer (LCL) that is in contact with at least one of MAG1 and MAG2 for mediating intergranular exchange coupling in the ferromagnetic layer or layers with which it is in contact (MAG2 or MAG1). The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy with which it is in contact (MAG2 or MAG1).

Abstract translation: 图案化的垂直磁记录介质具有离散的磁岛，每个磁岛具有包含两个交换耦合的铁磁层的记录层（RL）结构。 RL结构可以是具有上铁磁层（MAG2）的“交换弹簧”RL结构，有时称为交换弹簧层（ESL），铁磁耦合到下铁磁层（MAG1），有时称为介质层 ML）。 RL结构还可以包括允许铁磁耦合的MAG1和MAG2之间的耦合层（CL）。 可以通过调整CL的材料和厚度来部分地优化MAG1和MAG2之间的层间交换耦合。 RL结构还可以包括与MAG1和MAG2中的至少一个接触的铁磁侧向耦合层（LCL），用于介导与其接触的铁磁层（MAG2或MAG1）中的晶间交换耦合。 LCL中的铁磁合金与其接触的铁磁合金（MAG2或MAG1）具有明显更大的晶间交换耦合。

公开(公告)号：US08021769B2

公开(公告)日：2011-09-20

申请号：US11751823

申请日：2007-05-22

Applicant: Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  Ernesto E. Marinero

Inventor： Andreas Klaus Berger ,  Eric E. Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  Ernesto E. Marinero

IPC: G11B5/66

CPC classification number: G11B5/66 ,  G11B5/65 ,  G11B5/855

Abstract: A patterned perpendicular magnetic recording medium has discrete magnetic islands, each of which has a recording layer (RL) structure that comprises two exchange-coupled ferromagnetic layers. The RL structure may be an “exchange-spring” RL structure with an upper ferromagnetic layer (MAG2), sometimes called the exchange-spring layer (ESL), ferromagnetically coupled to a lower ferromagnetic layer (MAG1), sometimes called the media layer (ML). The RL structure may also include a coupling layer (CL) between MAG1 and MAG2 that permits ferromagnetic coupling. The interlayer exchange coupling between MAG1 and MAG2 may be optimized, in part, by adjusting the materials and thickness of the CL. The RL structure may also include a ferromagnetic lateral coupling layer (LCL) that is in contact with at least one of MAG1 and MAG2 for mediating intergranular exchange coupling in the ferromagnetic layer or layers with which it is in contact (MAG2 or MAG1). The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy with which it is in contact (MAG2 or MAG1).

Abstract translation: 图案化的垂直磁记录介质具有离散的磁岛，每个磁岛具有包含两个交换耦合的铁磁层的记录层（RL）结构。 RL结构可以是具有上铁磁层（MAG2）的“交换弹簧”RL结构，有时称为交换弹簧层（ESL），铁磁耦合到下铁磁层（MAG1），有时称为介质层 ML）。 RL结构还可以包括允许铁磁耦合的MAG1和MAG2之间的耦合层（CL）。 可以通过调整CL的材料和厚度来部分地优化MAG1和MAG2之间的层间交换耦合。 RL结构还可以包括与MAG1和MAG2中的至少一个接触的铁磁侧向耦合层（LCL），用于介导与其接触的铁磁层（MAG2或MAG1）中的晶间交换耦合。 LCL中的铁磁合金与其接触的铁磁合金（MAG2或MAG1）具有明显更大的晶间交换耦合。

公开(公告)号：US20090155627A1

公开(公告)日：2009-06-18

申请号：US11956389

申请日：2007-12-14

Applicant: Andreas Klaus Berger ,  Eric Edward Fullerton ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson

Inventor： Andreas Klaus Berger ,  Eric Edward Fullerton ,  Byron Hassberg Lengsfield, III ,  James Terrence Olson

IPC: G11B5/62 ,  G11B5/84

CPC classification number: G11B5/66

Abstract: A media architecture is optimized for discrete track recording. A capped or exchange-spring media uses a thin media structure and incorporates higher moment density magnetic layers. A thin exchange coupling layer is used in conjunction with a cap layer to control the reversal mechanism and exchange. Thus, the exchange coupling layer mediates the interaction between the two outer magnetic layers. The thickness of the exchange coupling layer is tuned by monitoring the media signal-to-noise ratio, track width and bit error rate. The recording performance is enhanced by tuning the intergranular exchange in the system through the use of the high-moment cap as writeability, resolution and noise are improved.

Abstract translation: 媒体架构针对离散轨道记录进行了优化。 封盖或交换弹簧介质使用薄介质结构并且结合较高的力矩密度磁层。 薄交换耦合层与盖层结合使用以控制反转机制和交换。 因此，交换耦合层介导两个外磁层之间的相互作用。 通过监测介质信噪比，轨道宽度和误码率来调整交换耦合层的厚度。 通过使用高功率上限作为可写性来调整系统中的晶间交换，提高了记录性能，提高了分辨率和噪声。

公开(公告)号：US20080199735A1

公开(公告)日：2008-08-21

申请号：US11676299

申请日：2007-02-18

Applicant: Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield

Inventor： Andreas Klaus Berger ,  Eric E. Fullerton ,  Byron Hassberg Lengsfield

IPC: G11B5/706

CPC classification number: G11B5/66

Abstract: A perpendicular magnetic recording system uses an exchange-spring type of perpendicular magnetic recording medium. The medium has a recording layer (RL) that includes a lower media layer (ML) and a multilayer exchange-spring layer (ESL) above the ML. The high anisotropy field (high-Hk) lower ML and the multilayer ESL are exchange-coupled across a coupling layer. The multilayer ESL has at least two ESLs separated by a coupling layer, with each of the ESLs having an Hk substantially less than the Hk of the ML. The exchange-spring structure with the multilayer ESL takes advantage of the fact that the write field magnitude and write field gradient vary as a function of distance from the write pole. The thicknesses and Hk values of each of the ESLs can be independently varied to optimize the overall recording performance of the medium.

Abstract translation: 垂直磁记录系统使用交换弹簧式垂直磁记录介质。 介质具有记录层（RL），其包括ML上方的下介质层（ML）和多层交换弹簧层（ESL）。 较高的各向异性场（high-H k k N）较低的ML和多层ESL在耦合层之间交换耦合。 多层ESL具有由耦合层隔开的至少两个ESL，其中每个ESL具有基本上小于ML的H k k N。 具有多层ESL的交换弹簧结构利用写入场幅度和写场梯度随着与写入极的距离的函数而变化的优点。 可以独立地改变每个ESL的厚度和厚度值，以优化介质的整体记录性能。

公开(公告)号：US20080057349A1

公开(公告)日：2008-03-06

申请号：US11470310

申请日：2006-09-06

Applicant: Andreas Klaus Berger ,  Hoa Van Do ,  Yoshihiro Ikeda ,  Byron Hassberg Lengsfield ,  Hal Jervis Rosen ,  Kentaro Takano ,  Min Xiao

Inventor： Andreas Klaus Berger ,  Hoa Van Do ,  Yoshihiro Ikeda ,  Byron Hassberg Lengsfield ,  Hal Jervis Rosen ,  Kentaro Takano ,  Min Xiao

IPC: G11B5/65

CPC classification number: G11B5/65 ,  G01R33/1207

Abstract: A high performance perpendicular media with optimal exchange coupling between grains has improved thermal stability, writeability, and signal-to-noise ratio in a selected range of allowable intergranular exchange between the grains for high performing media. The writeability and byte error rate of a TaOx media are demonstrated to be substantially better than that of other designs.

Abstract translation: 具有晶粒之间的最佳交换耦合的高性能垂直介质在高性能介质的晶粒之间允许的晶间交换的选定范围内提高了热稳定性，可写性和信噪比。 证明了TaO x x介质的可写性和字节错误率显着优于其他设计。

公开(公告)号：US07582368B2

公开(公告)日：2009-09-01

申请号：US11532055

申请日：2006-09-14

Applicant: Andreas Klaus Berger ,  Hoa Van Do ,  Byron Hassberg Lengsfield, III ,  Natacha F. Supper

Inventor： Andreas Klaus Berger ,  Hoa Van Do ,  Byron Hassberg Lengsfield, III ,  Natacha F. Supper

IPC: G11B5/66

CPC classification number: G11B5/66 ,  G11B5/65 ,  G11B5/82

Abstract: A perpendicular magnetic recording system and medium has a multilayered recording layer that includes an exchange-spring structure and a ferromagnetic lateral coupling layer (LCL). The exchange-spring structure is made up of two ferromagnetically exchange-coupled magnetic layers (MAG1 and MAG2), each with perpendicular magnetic anisotropy. MAG1 and MAG2 are either in direct contact with one another or have a coupling layer (CL) located between them. The LCL is located in direct contact with MAG2 and mediates intergranular exchange coupling in MAG2. The ferromagnetic alloy in the LCL has significantly greater intergranular exchange coupling than the ferromagnetic alloy in MAG2, which typically will include segregants such as oxides. The LCL is preferably free of oxides or other segregants, which would tend to reduce intergranular exchange coupling in the LCL. Because the LCL grain boundaries overlay the boundaries of the generally segregated and decoupled grains of MAG2, and the LCL and MAG2 grains are strongly coupled perpendicularly, the LCL introduces an effective intergranular exchange coupling in the MAG2.

Abstract translation: 垂直磁记录系统和介质具有包括交换弹簧结构和铁磁横向耦合层（LCL）的多层记录层。 交换弹簧结构由两个铁磁交换磁性层（MAG1和MAG2）组成，每个具有垂直的磁各向异性。 MAG1和MAG2彼此直接接触或者位于它们之间的耦合层（CL）。 LCL与MAG2直接接触并介导MAG2中的晶间交换耦合。 LCL中的铁磁合金具有比MAG2中的铁磁合金明显更大的晶间交换耦合，其通常将包括分离子如氧化物。 LCL优选不含氧化物或其它分离剂，其倾向于降低LCL中的晶间交换偶联。 因为LCL晶界覆盖了MAG2的大致分离和去耦晶粒的边界，并且LCL和MAG2晶粒垂直强耦合，所以LCL在MAG2中引入有效的晶间交换耦合。

公开(公告)号：US07529065B2

公开(公告)日：2009-05-05

申请号：US11134746

申请日：2005-05-19

Applicant: Eric Edward Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  David T. Margulies

Inventor： Eric Edward Fullerton ,  Olav Hellwig ,  Byron Hassberg Lengsfield, III ,  David T. Margulies

IPC: G11B5/66

CPC classification number: G11B5/012 ,  G11B5/66 ,  G11B2005/0002

Abstract: The invention uses an upper and lower magnetic layer of a laminated magnetic layer structure that includes an AF spacer layer that results in weak antiferromagnetic coupling of the magnetic layers that is insufficient to cause either of the layers to switch so that the magnetic orientations of the two ferromagnetic layers remain parallel. An advantage of the invention is that the AF-coupling tends to anti-correlate the noise in the two layers. The weak AF coupling according to the invention is believed to act at the transition boundaries in the media to cause some of the noise domains to be oriented antiparallel and the noise to be less correlated than would be the case without the AF coupling and thereby to achieve improved SNR.

Abstract translation: 本发明使用层叠磁性层结构的上下磁性层，其包括AF间隔层，其导致磁性层的弱反铁磁耦合，其不足以导致任一层切换，使得两者的磁取向 铁磁层保持平行。 本发明的一个优点是AF耦合倾向于使两层中的噪声相互关联。 认为根据本发明的弱AF耦合被认为在介质中的过渡边界处起作用以使得一些噪声区域被反平行取向，并且噪声与没有AF耦合的情况相比更不相关，从而实现 改善的SNR。

公开(公告)号：US07443630B2

公开(公告)日：2008-10-28

申请号：US11279072

申请日：2006-04-07

Applicant: Byron Hassberg Lengsfield, III ,  Andreas Moser ,  Walter Eugene Weresin

Inventor： Byron Hassberg Lengsfield, III ,  Andreas Moser ,  Walter Eugene Weresin

IPC: G11B5/596

CPC classification number: G11B5/02 ,  B82Y10/00 ,  G11B5/596 ,  G11B5/743 ,  G11B5/82 ,  G11B2005/0005

Abstract: An apparatus, system, and method are disclosed for writing magnetically encoded data. A servo module positions a write head relative to a first land such that a first edge of the write head is positioned substantially over a first land edge of the first land. The write head has a radial width greater than the sum of a radial width of the first land and radial widths of interior and exterior grooves such that the write head is also positioned over at least a portion of a second adjacent land. The write head writes magnetically encoded data to the first land. The servo module further positions the write head relative to a second land such that the first edge of the write head is positioned substantially over a second land edge of the second land and the write head is not positioned over the first land.

Abstract translation: 公开了用于写入磁编码数据的装置，系统和方法。 伺服模块相对于第一焊盘定位写入头，使得写入头的第一边缘基本上位于第一焊盘的第一焊盘边缘上。 写头具有大于第一平台的径向宽度和内部和外部凹槽的径向宽度之和的径向宽度，使得写入头也位于第二相邻平台的至少一部分上方。 写头将磁编码数据写入第一个地。 伺服模块还使写入头相对于第二焊盘定位，使得写入头的第一边缘基本上位于第二焊盘的第二焊盘边缘上，并且写入头不位于第一焊盘的上方。

公开(公告)号：US07894159B2

公开(公告)日：2011-02-22

申请号：US11737707

申请日：2007-04-19

Applicant: Byron Hassberg Lengsfield, III ,  James Terrence Olson ,  Thomas Dudley Boone, Jr. ,  Petrus Antonius Van Der Heijden

Inventor： Byron Hassberg Lengsfield, III ,  James Terrence Olson ,  Thomas Dudley Boone, Jr. ,  Petrus Antonius Van Der Heijden

IPC: G11B5/127

CPC classification number: G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/3146 ,  G11B5/315

Abstract: A magnetic write head having independent trailing and side magnetic shields. The side shields and trailing shields are independently of one another so that they can have throat heights that are different from one another. This advantageously allows the magnetic potential between the write pole and side shields to be controlled independently of one another without relying on the side gap and trailing gap thicknesses. Furthermore, magnetic performance of the write head can be improved because the side shields can be constructed with varying tapered throat heights, while the throat height of the trailing shield can remain constant.

Abstract translation: 具有独立尾部和侧面磁屏蔽的磁性写入头。 侧护罩和后挡板彼此独立，使得它们可以具有彼此不同的喉部高度。 这有利地允许写磁极和侧屏蔽之间的磁电势彼此独立地控制，而不依赖于侧间隙和后隙间隙。 此外，可以改善写头的磁性能，因为侧屏可以构造成具有变化的锥形喉部高度，而后屏蔽的喉部高度可以保持恒定。