Patents by Inventor Benjamin Karni
Benjamin Karni has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6059555Abstract: 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. An optical system includes a laser directed at a beamsplitter to split the laser beam into two beams having approximately equal power, which are directed along parallel paths through a power control optics block to expose simultaneously opposite sides of a disk to be textured. The power control optics block includes means for attenuating and measuring each of the two beams. A shuttling mirror directs these two beams alternately at a disk within each of the two disk handling stations.Type: GrantFiled: September 4, 1996Date of Patent: May 9, 2000Assignee: International Business Machines CorporationInventors: Michael Barenboim, Peter Michael Baumgart, Peter B. Chrusch, Benny Michael Harper, Benjamin Karni, Pieter J. M. Kerstens, Doug John Krajnovich, Iraj Kahkesh Pour, Hong S. Seing, Andrew Ching Tam
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Patent number: 5940304Abstract: 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. Control of the tool is achieved using a right-side disk handling and processing controller, a right-side cassette handling controller, a left-side disk handling and processing controller, and a left side cassette handling controller. The two disk handling and processing controllers share hardware resources performing the texturing process.Type: GrantFiled: September 4, 1996Date of Patent: August 17, 1999Assignee: International Business Machines CorporationInventors: Michael Barenboim, Peter Michael Baumgart, Peter P. Chrusch, Benjamin Karni, Pieter J. M. Kerstens, Hong S. Seing, Andrew Ching Tam
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Patent number: 5830514Abstract: 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. Texturing occurs as the annular portions are exposed to a train of pulses from a Q-switched laser. The Q-switch within the laser is driven by a radio-frequency signal form an oscillator, which is in turn driven by a signal from a pulse generator, which can be adjusted to leave the radio-frequency signal on for a variable time between pulses without changing pulse frequency. The laser may be equipped with a shutter and with an electronic gate selectively preventing the production of laser pulses.Type: GrantFiled: September 4, 1996Date of Patent: November 3, 1998Assignee: International Business Machines CorporationInventors: Michael Barenboim, Peter Michael Baumgart, Peter P. Chrusch, Benjamin Karni, Pieter J. M. Kerstens, Hong S. Seing, Andrew Ching Tam
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Patent number: 5790433Abstract: A disk texturing tool is used, for example, to provide textured spots in an annular portion of both sides of a disk for a hard disk drive. Disks are moved into and out of the texturing process in cassettes, through two disk-handling stations. An optical system includes a laser directed at a beamsplitter to split the laser beam into two beams having approximately power, which are directed along parallel paths through a power control optics block to expose simultaneously opposite sides of a disk to be textured. The power level of each of these two beams is controlled by a program which operates in a teach mode to develop a look up table describing laser beam power as a function of a signal driving an attenuator, in a set point mode setting this drive signal to provide a certain laser beam power, in a run mode controlling this power through a feedback loop, and in a display mode showing laser beam power as a function of time.Type: GrantFiled: September 5, 1996Date of Patent: August 4, 1998Assignee: International Business Machines CorporationInventors: Michael Barenboim, Peter Michael Baumgart, Peter P. Chrusch, Benny Michael Harper, Benjamin Karni, Pieter J. M. Kerstens, Hong S. Seing, Andrew Ching Tam
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Patent number: 5699160Abstract: Inspection apparatus for determining the profile of textured spots extending in a pattern along a surface of a magnetic disk includes an interferometer which illuminates first and second, adjacently disposed test spots on the surface. The disk and the interferometer are moved, relative to one another, so that one of the test spots traverses the textured spots in the pattern while the other test spot is moved along a flat portion of the disk surface. In one embodiment, the inspection apparatus is built into the device forming the textured spots, providing feedback controlling the texturing process.Type: GrantFiled: September 23, 1996Date of Patent: December 16, 1997Assignee: International Business Machines CorporationInventors: Michael Barenboim, Peter Michael Baumgart, Peter P. Chrusch, Benny Michael Harper, Benjamin Karni, Pieter J. M. Kerstens, Michael Gerard Lisanke, Hong S. Seing, Huizong Lu, Lanphuong Thi Pena, Ali Reza Taheri, Andrew Ching Tam
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Patent number: 5658475Abstract: 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.Type: GrantFiled: March 11, 1996Date of Patent: August 19, 1997Assignee: International Business Machines CorporationInventors: Michael Barenboim, Peter Michael Baumgart, Benjamin Karni, Pieter J. M. Kerstens, Thao Anh Nguyen, Hong S. Seing, Andrew Ching Tam, Peter Paul Chrusch
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Patent number: RE37145Abstract: 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.Type: GrantFiled: August 13, 1999Date of Patent: April 24, 2001Assignee: International Business Machines CorporationInventors: Michael Barenboim, Peter Michael Baumgart, Peter Paul Chrusch, Benjamin Karni, Pieter J. M. Kerstens, Thao Anh Nguyen, Hong S. Seing, Andrew Ching Tam