公开(公告)号：GB2513572A

公开(公告)日：2014-11-05

申请号：GB201307697

申请日：2013-04-29

Applicant: IBM

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

IPC: G11B15/64

Abstract: A tape head 1 comprises a tape bearing surface 11, shaped to form an air bearing 40, a thermal tape-head distance sensor circuit adapted to sense heat dissipated at the level of the tape bearing surface by the tape and thereby sense a distance d between the tape bearing surface and the tape. A tape-head distance control means 22 controls the bearing surface to tape distance according to a signal received from the tape-head distance sensor circuit. Closed loop feedback control can be used and the tape bearing surface may have non-skiving edges. The tape head to tape distance may be controlled with electrostatic attractors 24. The tape head may include a heater element 16 and heating circuit 13 to provide constant power to the heating circuit. The heating element may also be a resistance temperature detector which is thermally insulated from the tape bearing surface surrounding it by an air gap.

公开(公告)号：GB2508388A

公开(公告)日：2014-06-04

申请号：GB201221556

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 first servo subband SB1 and a second servo subband SB2. The first servo subband comprises a set of servo frames FR, wherein each servo frame FR of the set comprises a first burst A comprising servo stripes SP1 inclined at a first angle α, followed by a second burst B comprising servo stripes SP2 inclined at a second angle β which is different to the first angle. The second servo sub band contains a set of servo tracks ST1-6 arranged next to each other and extending along the tape, wherein each servo track of the set contains a servo pattern of magnetic transitions representing a waveform, where the waveforms of adjacent servo tracks are orthogonal to each other. The servo tracks may have three frequencies f1-f3 that are different from each other.

公开(公告)号：GB2503482A

公开(公告)日：2014-01-01

申请号：GB201211469

申请日：2012-06-28

Applicant: IBM

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

IPC: G11B15/62

Abstract: A tape head system comprises a read and/or write head 102 having at least one read and/or write element 104 for reading from and/or writing to magnetic tape 112 and at least one electrostatic element 106, 108 arranged adjacent to the read and/or write element. A controller 122 applies a potential 118, 120 to the at least one electrostatic element. A voltage applied to the electrostatic element may be dynamically controlled to maintain a spacing d1, d2, d3, d4. The voltage may be applied so that the magnetic tape contacts the head along a first section 130 and is spaced apart from the head along a second section 138 by an air bearing 132. The head system may include a tensioning unit 128. The electrostatic elements may be formed metal islands integrated into the head surface.