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公开(公告)号：IN190350B
公开(公告)日：2003-07-19
申请号：IN1345DE1994
申请日：1994-10-25
Applicant: IBM
Inventor： BAUMGART PETER MICHAEL , LEUNG WING PUN , NGUYEN HUNG VIET , NGUYEN THAO ANH , TAM ANDREW CHING , WU ANTHONY
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公开(公告)号：AT185015T
公开(公告)日：1999-10-15
申请号：AT94308034
申请日：1994-11-01
Applicant: IBM
Inventor： BAUMGART PETER MICHAEL , LEUNG WING PUN , NGUYEN HUNG VIET , NGUYEN THAO ANH , TAM ANDREW CHING , WU ANTHONY
Abstract: A process is disclosed for creating an array of bumps to texture a brittle surface, such as a glass substrate 12 for data recording disks. The texturing process uses a laser 10 to provide pulses of proper energy fluence to the brittle glass surface to produce a plurality of raised bumps in the surface. The bump creation is accomplished without unwanted micro-cracking or ejection of surface material by limiting the laser pulse fluence to a value in a narrow operating region discovered below the abrupt thermal shock fluence threshold for the brittle surface material. The process is also applicable to other brittle surface textures, such as those intended for use as "stamping surfaces" for the contact reproduction of the negative of a surface pattern, such as an optical disk.
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3.发明专利
公开(公告)号：SG52187A1
公开(公告)日：1998-09-28
申请号：SG1995002091
申请日：1995-12-11
Applicant: IBM
Inventor： NGUYEN THAO ANH
Abstract: A magnetic recording disk has a textured test band that is radially spaced from the textured landing zone and that typically has laser-induced bumps with an average height substantially different from the average height of the laser-induced bumps in the textured landing zone. The bumps in both the test band and the textured band are formed in spiral tracks because the disk is simultaneously rotated and translated radially while the texturing laser is pulsing the disk. However, because the bumps in the textured band are not formed until after the average height of the bumps in the test band have been measured by a second analyzing laser, the two spiral tracks are separate and discontinuous.
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Patent Agency Ranking
公开(公告)号：SG77155A1
公开(公告)日：2000-12-19
申请号：SG1998000080
申请日：1998-01-10
Applicant: IBM
Inventor： ALBRECHT THOMAS ROBERT , BAUMGART PETER MICHAEL , NGUYEN THAO ANH , RUBIN KURT ALLAN , TAM ANDREW CHING
IPC: G11B5/00 , G11B5/012 , G11B5/016 , G11B5/09 , G11B5/65 , G11B5/73 , G11B5/738 , G11B5/82 , G11B5/84 , G11B11/10 , G11B13/00 , G11B20/10 , G11B27/11 , G11B27/24
Abstract: A magnetic disk with nonmagnetic information encoded under, in or above the magnetic layer of the disk is described along with the disk drive using the magnetic disks. The information may be stored as a series of laser-written marks (e.g., bumps, oxidized spots or spots with altered reflectivity) upon the surface(s) of each disk of the disk stack. The set of marks may be a series of laser bumps which serve a dual purpose as a landing zone or contact start/stop (CSS) zone for the slider and as encoded identifying information. During the manufacturing process for disk drives containing the disks, each disk's identifier can be read using outboard equipment such as an HRF tester or by means contained in the drive itself. Each disk identifier can then be stored magnetically in a special region of the hard disk reserved for use by the drive and/or within the flash memory of the hard drive. The drive can then communicate the identifier(s) to a host computer using the conventional communication hardware and firmware. In this way selected information such as the origin, batch number, date of manufacture, serial number, etc. of any disk can be obtained when needed as, for example, as part of failure analysis.
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公开(公告)号：DE69420812T2
公开(公告)日：2000-04-27
申请号：DE69420812
申请日：1994-11-01
Applicant: IBM
Inventor： BAUMGART PETER MICHAEL , LEUNG WING PUN , NGUYEN HUNG VIET , NGUYEN THAO ANH , TAM ANDREW CHING , WU ANTHONY
Abstract: A process is disclosed for creating an array of bumps to texture a brittle surface, such as a glass substrate 12 for data recording disks. The texturing process uses a laser 10 to provide pulses of proper energy fluence to the brittle glass surface to produce a plurality of raised bumps in the surface. The bump creation is accomplished without unwanted micro-cracking or ejection of surface material by limiting the laser pulse fluence to a value in a narrow operating region discovered below the abrupt thermal shock fluence threshold for the brittle surface material. The process is also applicable to other brittle surface textures, such as those intended for use as "stamping surfaces" for the contact reproduction of the negative of a surface pattern, such as an optical disk.
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公开(公告)号：DE69420812D1
公开(公告)日：1999-10-28
申请号：DE69420812
申请日：1994-11-01
Applicant: IBM
Inventor： BAUMGART PETER MICHAEL , LEUNG WING PUN , NGUYEN HUNG VIET , NGUYEN THAO ANH , TAM ANDREW CHING , WU ANTHONY
Abstract: A process is disclosed for creating an array of bumps to texture a brittle surface, such as a glass substrate 12 for data recording disks. The texturing process uses a laser 10 to provide pulses of proper energy fluence to the brittle glass surface to produce a plurality of raised bumps in the surface. The bump creation is accomplished without unwanted micro-cracking or ejection of surface material by limiting the laser pulse fluence to a value in a narrow operating region discovered below the abrupt thermal shock fluence threshold for the brittle surface material. The process is also applicable to other brittle surface textures, such as those intended for use as "stamping surfaces" for the contact reproduction of the negative of a surface pattern, such as an optical disk.
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公开(公告)号：SG46768A1
公开(公告)日：1998-02-20
申请号：SG1997000255
申请日：1997-02-05
Applicant: IBM
Inventor： BARENBOIM MICHAEL , BAUMGART PETER MICHAEL , CHRUSCH PETER PAUL , KARNI BENJAMIN , KERSTENS PIETER J M , NGUYEN THAO ANH , SEING HONG S , TAM ANDREW CHING
Abstract: A disk texturing tool is used, for example, to provide textured spots in an annular portion of both sides of a hardfile disk. Disks are moved into and out of the texturing process in cassettes, through two disk-handling stations. In each disk-handling station, a lifter raises each individual disk from the cassette. The individual disk is then transferred to a pick-and-place mechanism, which moves it to a spindle. The spindle spins and translates the disk, so that both sides of the disk are exposed to beams derived from a pulsed laser. The pick-and-place mechanism then returns the disk to the lifter, which lowers it into the cassette pocket from which it was taken. The pick-and-place mechanism simultaneously moves one disk from the lifter to the spindle and another from the spindle to the lifter. While disks are moved by the pick-and-place mechanism of one disk-handling station, a disk in the spindle of the other disk-handling station is exposed to the laser beams.
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公开(公告)号：SG44398A1
公开(公告)日：1997-12-19
申请号：SG1996000145
申请日：1994-11-01
Applicant: IBM
Inventor： BAUMGART PETER MICHAEL , LEUNG WING PUN , NGUYEN HUNG VIET , NGUYEN THAO ANH , TAM ANDREW CHING , WU ANTHONY
Abstract: A process is disclosed for creating an array of bumps to texture a brittle surface, such as a glass substrate 12 for data recording disks. The texturing process uses a laser 10 to provide pulses of proper energy fluence to the brittle glass surface to produce a plurality of raised bumps in the surface. The bump creation is accomplished without unwanted micro-cracking or ejection of surface material by limiting the laser pulse fluence to a value in a narrow operating region discovered below the abrupt thermal shock fluence threshold for the brittle surface material. The process is also applicable to other brittle surface textures, such as those intended for use as "stamping surfaces" for the contact reproduction of the negative of a surface pattern, such as an optical disk.
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