公开(公告)号：WO2014083508A3

公开(公告)日：2014-07-24

申请号：PCT/IB2013060436

申请日：2013-11-27

Applicant: IBM ,  IBM RES GMBH

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

CPC classification number: G11B5/584

Abstract: A tape storage medium comprises at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information. The servo band (SB) comprises a first servo subband (SB1) extending along the longitudinal extension (x) of the tape storage medium (1) and a second servo subband (SB2) extending along the longitudinal extension (x) of the tape storage medium (TP) next to the first servo subband (SB1). The first servo subband (SB1) comprises a frame servo pattern containing a set of servo frames (FR), wherein each servo frame (FR) of the set comprises a first burst (A) comprising at least two servo stripes (SP1) inclined at a first angle ( α) with respect to a direction orthogonal to the longitudinal extension (x) of the tape medium (TP), followed by a second burst (B) comprising at least two servo stripes (SP2) inclined at a second angle (&bgr;) with respect to the direction orthogonal to the longitudinal extension (x) of the tape medium (TP), which second angle (α) is different from the first angle (&bgr;). The second servo subband (SB2) contains a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other, wherein each servo track (STx) of the set contains a servo pattern of magnetic transitions representing a waveform when being read, and wherein the waveforms of adjacent servo tracks (STx) are orthogonal to each other.

Abstract translation: 磁带存储介质包括沿着磁带存储介质（TP）的纵向延伸（x）的至少一个伺服带（SB），用于支持确定位置信息。 伺服带（SB）包括沿带存储介质（1）的纵向延伸（x）延伸的第一伺服子带（SB1）和沿着带存储器（1）的纵向延伸（x）延伸的第二伺服子带 介质（TP）紧挨着第一伺服子带（SB1）。 第一伺服子带（SB1）包括含有一组伺服帧（FR）的帧伺服模式，其中该组的每个伺服帧（FR）包括第一脉冲串（A），该第一脉冲串包括至少两个伺服条纹（SP1） （TP）的与纵向延伸（x）正交的方向的第一角度（α），接着是包括以第二角度倾斜的至少两个伺服条纹（SP2）的第二脉冲（B）（ （α）与第一角度（β）不同的正交于带式介质（TP）的纵向延伸（x）的方向）。 第二伺服子频带（SB2）包含沿着磁带存储介质（TP）的纵向延伸（x）延伸并且彼此相邻排列的一组伺服磁道（STx），其中该组的每个伺服磁道（STx）包含 当读取时表示波形的磁转变的伺服模式，并且其中相邻伺服轨道（STx）的波形彼此正交。

公开(公告)号：GB2508387A

公开(公告)日：2014-06-04

申请号：GB201221553

申请日：2012-11-30

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  ROTHUIZEN HUGO E

IPC: G11B5/23 ,  G11B5/584

Abstract: A write head is provided for writing a servo pattern to a magnetic tape storage medium. The write head comprises at least a first write gap A and a second write gap B, the gaps being separately energizable. The second write gap comprises at least a first section a and a second section b. Energization of the second write gap causes a magnetic flux across the first section insufficient for changing a magnetization of a track and the second section 10 is designed such that energization causes a magnetic flux across the second section sufficient for magnetizing a track of the magnetic tape storage medium TP. The gaps may be inclined or perpendicular to a motion direction of the tape. The head may have a third write gap separately energizable to the first and second gaps where the third gap also has first and second sections. A method of writing a servo band comprises moving a servo band across at least first and second write gaps.

公开(公告)号：GB2508389A

公开(公告)日：2014-06-04

申请号：GB201221557

申请日：2012-11-30

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

Abstract: A tape storage medium comprises a servo band SB along a longitudinal extension x of the tape TP for determining positional information. The servo band comprises a set of servo tracks ST1-6 arranged next to each other. Each servo track of the set contains a pseudo noise sequence PN_A-C of symbols, where the pseudo noise sequences of servo patterns of adjacent servo tracks are different from each other. The set of servo tracks contains at least three servo tracks with different pseudo noise sequences. The waveforms of adjacent servo tracks may be orthogonal to each other in the time domain. The servo patterns may contain additional information such as longitudinal position, manufacturing information or a servo band identifier. A tape head contains a servo reader SR where the width of the reader wSR is at least a width of a servo track wST. A read back signal of the servo reader is used for adjusting a lateral position of a tape head.

公开(公告)号：GB2502574A

公开(公告)日：2013-12-04

申请号：GB201209674

申请日：2012-05-31

Applicant: IBM

Inventor： ROTHUIZEN HUGO E ,  DELLMANN LAURENT A ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  LANTZ MARK ALFRED

IPC: G11B5/265

Abstract: A write head 108 comprises a yoke 110 having at least a first and a second gap 112, 114 and a coil 116 for producing a magnetic field at each gap. The coil comprises a plurality of windings 118, 120 which are arranged to produce the same magnetic field strength at each gap and/or along each gap by use of a proximity effect between the windings and a respective gap. Gaps may be arranged symmetrically about a first line 214 and the windings 209, 209, 213, 213 can be arranged in a pattern symmetrically about a second line 212 where the first and second lines are offset from each other. The distance between neighboring winding portions may vary and the windings may be non-parallel to each other. The write head can be used for writing servo patterns on magnetic tape.

公开(公告)号：GB2517714A

公开(公告)日：2015-03-04

申请号：GB201315325

申请日：2013-08-29

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

Abstract: A tape storage medium TP comprising a servo band SB along a longitudinal extension x of the tape. The servo band comprises a set of servo tracks STx of width wST extending along the longitudinal extension of the tape and arranged next to each other. A total of two different servo patterns PN_A, PN_B are contained in the set of servo tracks and servo patterns of adjacent servo tracks are different from each other. A tape head comprises two servo readers SR1 and SR2 for reading the servo band. A width wSR1, wSR2 of each servo reader orthogonal to the longitudinal extension of the tape is at least half the width of a servo track. The two servo readers are offset oR from each other orthogonal to the longitudinal extension of the tape by d*wST+n*wST with 0

公开(公告)号：GB2503483A

公开(公告)日：2014-01-01

申请号：GB201211473

申请日：2012-06-28

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  LANTZ MARK ALFRED

IPC: G11B5/584 ,  G11B5/265

Abstract: A magnetic tape servo band comprises servo patterns organized in servo frames FR for determining positional information. The servo frames comprise a first burst A comprising at least two servo stripes 111 inclined at a first angle α followed by a second burst B comprising at least two servo stripes inclined at a second angle β with respect to a direction orthogonal to the longitudinal extension of the tape medium. The second angle being different to the first angle. At least one of the stripes of the first burst has a first magnetic polarity and at least one of the stripes of the second burst has a second magnetic polarity different from the first magnetic polarity. A servo write head has first and second ring structures with a gap in each ring structure where the magnetic flux is oriented in opposite direction across the gaps.

公开(公告)号：GB2529448A

公开(公告)日：2016-02-24

申请号：GB201414809

申请日：2014-08-20

Applicant: IBM

Inventor： ENGELEN JOHAN B C ,  LANTZ MARK ALFRED ,  ROTHUIZEN HUGO E

IPC: G11B5/187

Abstract: A tape head 1 is adapted for reading and/or writing to a magnetic tape and has a tape-bearing surface comprising a transducer area 30 and a cavity 51, 52 adjacent to the transducer area. The transducer area comprises at least one transducer that is a read and/or write element. The cavity is open on the tape-bearing surface, and extends parallel to the transducer area, transversally to a longitudinal direction of circulation of the tape, such that an opening of the cavity faces the tape, in operation. The cavity is further dimensioned and arranged with respect to the transducer area to create sub-ambient pressure upon circulation of the tape. Air bleed slots may connect to the cavity and a lateral edge surface or another cavity. The transducer area may form a crenellated structure so that the transducers protrude. The tape head may have a bevelled 72b or rounded edge.

公开(公告)号：GB2523059A

公开(公告)日：2015-08-12

申请号：GB201510786

申请日：2013-11-27

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

Abstract: A tape storage medium comprises at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information. The servo band (SB) comprises a first servo subband (SB1) extending along the longitudinal extension (x) of the tape storage medium (1) and a second servo subband (SB2) extending along the longitudinal extension (x) of the tape storage medium (TP) next to the first servo subband (SB1). The first servo subband (SB1) comprises a frame servo pattern containing a set of servo frames (FR), wherein each servo frame (FR) of the set comprises a first burst (A) comprising at least two servo stripes (SP1) inclined at a first angle ( α) with respect to a direction orthogonal to the longitudinal extension (x) of the tape medium (TP), followed by a second burst (B) comprising at least two servo stripes (SP2) inclined at a second angle (β) with respect to the direction orthogonal to the longitudinal extension (x) of the tape medium (TP), which second angle (α) is different from the first angle (β). The second servo subband (SB2) contains a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other, wherein each servo track (STx) of the set contains a servo pattern of magnetic transitions representing a waveform when being read, and wherein the waveforms of adjacent servo tracks (STx) are orthogonal to each other.

公开(公告)号：GB2515051A

公开(公告)日：2014-12-17

申请号：GB201310445

申请日：2013-06-12

Applicant: IBM

Inventor： JONNALAGADDA VARAD PRASAD ,  DELLMANN LAURENT A ,  ENGELEN JOHAN B C ,  LANTZ MARK ALFRED

IPC: G11B5/187 ,  G11B5/255

Abstract: A tape head 1g has a tape-bearing surface 21 configured, in operation, to urge a magnetic tape against the bearing surface. The bearing surface comprises a transducer area 44 having at least one transducer 40 that is a read and/or write element, and a structured area 50u, 50d, 52l, 52r adjacent to the transducer area comprising a periodic array of protruding topographic features. The topographic features configured to determine a minimal distance between the transducer area and a tape. The tape bearing surface can comprise different structured areas having different topographic features or areas without topographic features. The topographic features may have a diameter between 100 and 5000 nm with a distance between the features of 1 and 20 micrometres. A layer of material, such as FeN, TiN, SiN, diamond like carbon, or aluminium oxide, may be deposited on top of the features.

公开(公告)号：GB2508390A

公开(公告)日：2014-06-04

申请号：GB201221558

申请日：2012-11-30

Applicant: IBM

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

Abstract: A tape storage medium comprises at least one servo band SB along a longitudinal extension x of the tape storage medium TP for determining positional information such as lateral deviation for a position error signal. The servo band comprises a set of servo tracks ST1-6 extending along the longitudinal extension x of the tape storage medium and arranged next to each other. Each servo track of the set contains a servo pattern with magnetic transitions at a defined frequency f1-3, wherein the frequencies of magnetic transitions of servo patterns of adjacent servo tracks are different from each other. The set of servo tracks contains at least three servo tracks with magnetic transitions of different frequencies. Adjacent servo tracks may have orthogonal frequencies. Additional information such as longitudinal information may be encoded into the servo patterns. A tape head has at least one servo reader SR for reading the servo band and the width wSR of the servo reader is a least the width of a servo track wST.