公开(公告)号：SG34301A1

公开(公告)日：1996-12-06

申请号：SG1995001807

申请日：1995-11-10

Applicant: IBM

Inventor： YARMCHUK EDWARD JOHN ,  SCHULTZ MARK D ,  WEBB BUCKNELL C ,  CHAINER TIMOTHY JOSEPH

IPC: G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B21/10 ,  G11B5/58

Abstract: During a write revolution of a storage medium, a transition is written on the storage medium while servoing on another transition previously recorded on the storage medium. During that write revolution, a position error signal corresponding to the position error of the transducer relative to the previously recorded transition is determined. That position error signal is then stored, during the write revolution, to be used in computing a reference track value associated with the transition being written to correct for the position error. Additionally, a product servo-pattern is written, which includes an embodying of the position error therein.

公开(公告)号：MY128973A

公开(公告)日：2007-03-30

申请号：MYPI9702018

申请日：1997-05-07

Applicant: IBM

Inventor： CHAINER TIMOTHY JOSEPH ,  SCHULTZ MARK DELORMAN ,  WEBB BUCKNELL CHAPMAN ,  YARMCHUK EDWARD JOHN

IPC: G01B5/02 ,  G11B5/48 ,  G11B5/55 ,  G11B5/596 ,  G11B21/08 ,  G11B21/10 ,  G11B27/30

Abstract: METHODS AND SYSTEMS FOR SELF-SERVOWRITING A DATA STORAGE MEDIUM ARE DISCLOSED, INCLUDING SERVOING TO PROPAGATION BURSTS OF A PROPAGATION PATTERN LOCATED IN TRACKS OTHER THAN AN IMMEDIATELY PRECEDING TRACK. REFERENCE LEVELS USED TO POSITION A RECORDING HEAD ARE ACCORDINGLY KEPT IN A USABLE DYNAMIC RANGE NECESSARY TO KEEP SERVO TRACK SPACING CONSTANT ACROSS THE MEDIUM. THE METHODS AND SYSTEMS ARE DISCLOSED IN CONNECTION WITH A ROTARY ACTUATOR HAVING SPACED READ AND WRITE HEADS. SIMILAR METHODS ARE DISCLOSED FOR WRITTING TRIGGER OR TIMING BURSTS OF THE PROPAGATION PATTERN.(FIG 4)

公开(公告)号：HU222296B1

公开(公告)日：2003-06-28

申请号：HU9801391

申请日：1995-03-13

Applicant: IBM

Inventor： CHAINER TIMOTHY JOSEPH ,  SOHN WAYNE JAY ,  YARMCHUK EDWARD JOHN

IPC: G11B5/596

公开(公告)号：DE69525323T2

公开(公告)日：2002-10-02

申请号：DE69525323

申请日：1995-11-03

Applicant: IBM

Inventor： CHAINER TIMOTHY JOSEPH ,  PRAINO ANTHONY PAUL ,  SCHULTZ MARK DELORMAN ,  WEBB BUCKNELL CHAPMAN ,  YARMCHUK EDWARD JOHN

IPC: G11B5/55 ,  G11B5/596 ,  G11B19/04 ,  G11B21/10 ,  G11B21/08

Abstract: Improvements in placement of timing patterns in self servo writing include correcting for random and systematic errors due to geometric effects. In a disk drive having a recording head with separate read and write elements, a method for determining separation between the elements and for correcting for such errors as a function of skew angle between the head and the disk. Errors resulting from misalignment and non-parallelism of the elements as well as misalignment of the head on it its actuator are also detected and corrected. Errors due to changes in rotational velocity of the disk and misplacement of timing patterns with respect to adjacent timing patterns are detected and corrected. In general, a single revolution process may be used to both write and detect random errors on each track and corrected on subsequent tracks.

公开(公告)号：DE69612778T2

公开(公告)日：2001-10-11

申请号：DE69612778

申请日：1996-02-13

Applicant: IBM

Inventor： CHAINER TIMOTHY JOSEPH ,  HERMAN JR ,  KRONGELB SOL ,  ROMANKIW LUBOMYR TARAS ,  YARMCHUK EDWARD JOHN

IPC: G11B19/20 ,  G11B25/04 ,  G11B33/12 ,  H02K21/24

Abstract: An integrated data storage disk and disk drive assembly includes a rotatably supported magnetic disk for storing data. A rotor is fixedly joined to the disk for rotating the disk, and includes a plurality of rotor poles. A stator includes a plurality of stator poles positioned around the rotor for sequentially cooperating with respective ones of the rotor poles for rotating the rotor to rotate the disk. The disk and drive may be fabricated using lithographic and electroplating techniques, and a plurality of coaxial disks may be driven by a single disk drive in exemplary embodiments.

公开(公告)号：SG71034A1

公开(公告)日：2000-03-21

申请号：SG1997002589

申请日：1995-11-10

Applicant: IBM

Inventor： CHAINER TIMOTHY JOSEPH ,  PRAINO ANTHONY PAUL ,  SCHULTZ MARK DELORMAN ,  WEBB BUCKNELL CHAPMAN ,  YARMCHUK EDWARD JOHN

IPC: G11B5/55 ,  G11B5/596 ,  G11B19/04 ,  G11B21/10 ,  G11B21/03 ,  G11B5/56

Abstract: Improvements in placement of timing patterns in self servo writing include correcting for random and systematic errors due to geometric effects. In a disk drive having a recording head with separate read and write elements, a method for determining separation between the elements and for correcting for such errors as a function of skew angle between the head and the disk. Errors resulting from misalignment and non-parallelism of the elements as well as misalignment of the head on it its actuator are also detected and corrected. Errors due to changes in rotational velocity of the disk and misplacement of timing patterns with respect to adjacent timing patterns are detected and corrected. In general, a single revolution process may be used to both write and detect random errors on each track and corrected on subsequent tracks.

公开(公告)号：SG52990A1

公开(公告)日：1998-09-28

申请号：SG1997002063

申请日：1997-06-14

Applicant: IBM

Inventor： CHAINER TIMOTHY JOSEPH ,  SCHULTZ MARK DELORMAN ,  WEBB BUCKNELL CHAPMAN ,  YARMCHUK EDWARD JOHN

IPC: G11B5/596 ,  G11B21/10 ,  G11B5/012

Abstract: An improved servowriting system and method whereby errors introduced into the written servo information are reduced or eliminated for greater servowriting accuracy. Accuracy is enhanced by one or more of the following improvements: 1) optimizing write current and write frequency to minimize write width modulation; 2) optimizing the RPM of the storage medium to minimize random mechanical vibration; and 3) providing a clip level check to eliminate the introduction of large errors in product servopattern. The proposed improvements provide substantial rejection of, for example, mechanical and magnetic disturbances, ensuring a robust servowriting process.

公开(公告)号：CZ9702752A3

公开(公告)日：1998-01-14

申请号：CZ275297

申请日：1995-03-13

Applicant: IBM

Inventor： CHAINER TIMOTHY JOSEPH ,  SOHN WAYNE JAY ,  YARMCHUK EDWARD JOHN

IPC: G11B21/10 ,  G11B20060101 ,  G11B5/596

公开(公告)号：CA2365103A1

公开(公告)日：1996-06-03

申请号：CA2365103

申请日：1995-11-24

Applicant: IBM

Inventor： WEBB BUCKNELL C ,  CHAINER TIMOTHY JOSEPH ,  YARMCHUK EDWARD JOHN ,  SCHULTZ MARK DELORMAN

IPC: G11B5/012 ,  G11B5/55 ,  G11B5/596 ,  G11B21/10

Abstract: During a write revolution of a storage medium, a transition is written on the storage medium while servoing on another transition previously recorded on the storage medium. During that write revolution, a position error signal corresponding to the position error of the transducer relative to the previously recorded transition is determined. That position error signal is then stored, during the write revolution, to be used in computing a reference track value associated with the transition being written to correct for the position error. Additionally, a product servo-pattern is written, which includes an embodying of the position error therein.

公开(公告)号：DE69207460D1

公开(公告)日：1996-02-22

申请号：DE69207460

申请日：1992-03-06

Applicant: IBM

Inventor： FLINT EPHRAIM BEMIS ,  YARMCHUK EDWARD JOHN

IPC: G02B6/122 ,  G01B7/31 ,  G02B7/00 ,  H01L33/00 ,  G02B6/42 ,  H01L21/66

Abstract: A method and structure permit the precision alignment in the packaging of optical components (10), such as lasers, detectors, lenses and waveguides. The technique involves capacitance measurements of an array of plates placed on the optoelectronic device chip and its package substrate (12). The technique uses phase sensitive detection to sense the total current capacitively coupled into a passive plate (14) on the device chip (10) from two overlapping plates (16, 18) located on the package substrate. When the device chip (10) is properly aligned with respect to the package substrate (12), the summed current sensed with a third overlapping plate (22) on the package substrate is a null.