Patents by Inventor Hugo E. Rothuizen
Hugo E. Rothuizen 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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MULTICHANNEL TAPE HEAD MODULE HAVING THERMOELECTRIC DEVICES FOR CONTROLLING SPAN BETWEEN TRANSDUCERS
Publication number: 20200126596Abstract: An apparatus, according to one embodiment, includes a module having an array of transducers, and a thermoelectric cooling element positioned proximate to the array of transducers. An apparatus, according to one embodiment, includes a module having an array of transducers, a thermoelectric cooling element positioned proximate to the array of transducers, and a heating element positioned proximate to the array of transducers. A method of maintaining a span of an array of transducers of module to a specification, according to one embodiment, includes determining whether the span of the array of transducers in a module is different than a target based on a specification. In response to determining the span is greater than the target, a control signal is applied to a thermoelectric cooling element positioned proximate to the span of the array of transducers for contracting the span of the array of transducers toward the target.Type: ApplicationFiled: October 18, 2018Publication date: April 23, 2020Inventors: Robert G. Biskeborn, Hugo E. Rothuizen -
Patent number: 10580442Abstract: An apparatus, according to one embodiment, includes: a module; and a plurality of tunnel valve read transducers arranged in an array extending along the module. Each of the tunnel valve read transducers includes: a sensor structure having a tunnel barrier layer and a free layer. Moreover, each of the tunnel valve read transducers includes a pair of hard bias magnets which sandwich the respective sensor structure therebetween, the hard bias magnets being positioned on opposite sides of the sensor structure along a cross-track direction. Furthermore, a thickness of each of the hard bias magnets at a thickest portion thereof is at least 10 times greater than a thickness of the free layer. Other systems, methods, and computer program products are described in additional embodiments.Type: GrantFiled: May 31, 2018Date of Patent: March 3, 2020Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Hugo E. Rothuizen
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Patent number: 10580438Abstract: In one embodiment, an apparatus includes a module having an array of transducers and a heating element positioned proximate to the array of transducers. The heating element has opposite ends and a center portion therebetween, where the heating element is configured to produce more heat per unit length along the opposite ends than in the center portion.Type: GrantFiled: October 18, 2018Date of Patent: March 3, 2020Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Hugo E. Rothuizen
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Publication number: 20200058324Abstract: A method of operating a magnetic tape within a tape drive. The tape drive comprises a tape head, which shows a tape-bearing surface meant to face a front side of a magnetic tape, in operation. The tape-bearing surface comprises a transducer area. This area includes at least one transducer, which is a read or write element configured to read or write to the magnetic tape, respectively. The method may include driving the tape (along a longitudinal direction of circulation thereof above the tape-bearing surface) and concomitantly ejecting a gas flow toward the transducer area. The gas flow ejected impinges on the back side of the driven tape (e.g., opposite to the front side of the tape), so as to locally urge the front side of the tape against the transducer area and thereby read or write to the tape via said at least one transducer.Type: ApplicationFiled: October 4, 2019Publication date: February 20, 2020Inventors: Hugo E. Rothuizen, Peter Reininger, Walter Haeberle, Mark A. Lantz
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Patent number: 10522182Abstract: A method of operating a magnetic tape within a tape drive. The tape drive comprises a tape head, which shows a tape-bearing surface meant to face a front side of a magnetic tape, in operation. The tape-bearing surface comprises a transducer area. This area includes at least one transducer, which is a read or write element configured to read or write to the magnetic tape, respectively. The method may include driving the tape (along a longitudinal direction of circulation thereof above the tape-bearing surface) and concomitantly ejecting a gas flow toward the transducer area. The gas flow ejected impinges on the back side of the driven tape (e.g., opposite to the front side of the tape), so as to locally urge the front side of the tape against the transducer area and thereby read or write to the tape via said at least one transducer.Type: GrantFiled: August 20, 2018Date of Patent: December 31, 2019Assignee: International Business Machines CorporationInventors: Hugo E. Rothuizen, Peter Reininger, Walter Haeberle, Mark A. Lantz
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Publication number: 20190369161Abstract: A computer-implemented method includes, by one or more processors in electronic communication with a tunneling magnetoresistive sensor, wherein the tunneling magnetoresistive sensor is a component of a magnetic storage drive configured to read magnetic data from a magnetic storage medium, detecting a short across the tunneling magnetoresistive sensor, measuring a change in resistance of the tunneling magnetoresistive sensor, measuring a change in voltage amplitude for the tunneling magnetoresistive sensor, and dividing said change in voltage amplitude by said change in resistance to yield a ratio. The computer-implemented method further includes, responsive to the ratio being greater than a predetermined ratio threshold, determining that the short is caused by a magnetic shunt. A corresponding computer program product and computer system are also disclosed.Type: ApplicationFiled: June 19, 2019Publication date: December 5, 2019Inventors: Robert G. Biskeborn, Wlodzimierz S. Czarnecki, Icko E. T. Iben, Hugo E. Rothuizen
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Publication number: 20190310326Abstract: A computer-implemented method includes, by one or more processors in electronic communication with a tunneling magnetoresistive sensor, wherein the tunneling magnetoresistive sensor is a component of a magnetic storage drive configured to read magnetic data from a magnetic storage medium, detecting a short across the tunneling magnetoresistive sensor, measuring a change in resistance of the tunneling magnetoresistive sensor, measuring a change in voltage amplitude for the tunneling magnetoresistive sensor, and dividing said change in voltage amplitude by said change in resistance to yield a ratio. The computer-implemented method further includes, responsive to the ratio being greater than a predetermined ratio threshold, determining that the short is caused by a magnetic shunt. A corresponding computer program product and computer system are also disclosed.Type: ApplicationFiled: June 19, 2019Publication date: October 10, 2019Inventors: Robert G. Biskeborn, Wlodzimierz S. Czarnecki, Icko E. T. Iben, Hugo E. Rothuizen
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Patent number: 10422829Abstract: A computer-implemented method includes, by one or more processors in electronic communication with a tunneling magnetoresistive sensor, wherein the tunneling magnetoresistive sensor is a component of a magnetic storage drive configured to read magnetic data from a magnetic storage medium, detecting a short across the tunneling magnetoresistive sensor, measuring a change in resistance of the tunneling magnetoresistive sensor, measuring a change in voltage amplitude for the tunneling magnetoresistive sensor, and dividing said change in voltage amplitude by said change in resistance to yield a ratio. The computer-implemented method further includes, responsive to the ratio being greater than a predetermined ratio threshold, determining that the short is caused by a magnetic shunt. A corresponding computer program product and computer system are also disclosed.Type: GrantFiled: June 27, 2016Date of Patent: September 24, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Wlodzimierz S. Czarnecki, Icko E. T. Iben, Hugo E. Rothuizen
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Patent number: 10371742Abstract: A computer-implemented method includes, by one or more processors in electronic communication with a tunneling magnetoresistive sensor, wherein the tunneling magnetoresistive sensor is a component of a magnetic storage drive configured to read magnetic data from a magnetic storage medium, detecting a short across the tunneling magnetoresistive sensor, measuring a change in resistance of the tunneling magnetoresistive sensor, measuring a change in voltage amplitude for the tunneling magnetoresistive sensor, and dividing said change in voltage amplitude by said change in resistance to yield a ratio. The computer-implemented method further includes, responsive to the ratio being greater than a predetermined ratio threshold, determining that the short is caused by a magnetic shunt. A corresponding computer program product and computer system are also disclosed.Type: GrantFiled: December 29, 2017Date of Patent: August 6, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Wlodzimierz S. Czarnecki, Icko E. T. Iben, Hugo E. Rothuizen
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Patent number: 10371743Abstract: A computer-implemented method includes, by one or more processors in electronic communication with a tunneling magnetoresistive sensor, wherein the tunneling magnetoresistive sensor is a component of a magnetic storage drive configured to read magnetic data from a magnetic storage medium, detecting a short across the tunneling magnetoresistive sensor, measuring a change in resistance of the tunneling magnetoresistive sensor, measuring a change in voltage amplitude for the tunneling magnetoresistive sensor, and dividing said change in voltage amplitude by said change in resistance to yield a ratio. The computer-implemented method further includes, responsive to the ratio being greater than a predetermined ratio threshold, determining that the short is caused by a magnetic shunt. A corresponding computer program product and computer system are also disclosed.Type: GrantFiled: December 30, 2017Date of Patent: August 6, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Wlodzimierz S. Czarnecki, Icko E. T. Iben, Hugo E. Rothuizen
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Patent number: 10374475Abstract: An apparatus according to one embodiment includes a motor having: a rotor, a magnet, and a damping layer positioned between the rotor and the magnet. The damping layer is constructed of a material characterized by converting kinetic energy into heat.Type: GrantFiled: July 20, 2016Date of Patent: August 6, 2019Assignee: International Business Machines CorporationInventors: David H. F. Harper, Hugo E. Rothuizen
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Patent number: 10278306Abstract: The invention relates to a cooling arrangement comprising a heat spreader (2) comprising a first surface (5), a second surface (8), at least one heat absorption chamber (9) and at least one heat dissipation chamber (10), the at least one heat absorption chamber (9) being in thermal contact with the first surface (5) and the at least one heat dissipation chamber (10) being in thermal contact with the second surface (8) and hydraulically coupled to the at least one heat absorption chamber (9). A cooling fluid (13) can be driven from the heat absorption chamber (9) to the heat dissipation chamber (10) using a plurality of flow patterns for cooling the first surface (5).Type: GrantFiled: February 26, 2015Date of Patent: April 30, 2019Assignee: GLOBAL FOUNDRIES INC.Inventors: Thomas J. Brunschwiler, Urs Kloter, Ryan Joseph Linderman, Bruno Michel, Hugo E. Rothuizen, Reto Waelchli
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Patent number: 10170143Abstract: A unidirectional and bi-directional tape head with sub-ambient pressure cavities. The tape head is adapted for reading and/or writing to a magnetic tape. The tape head includes: a tape-bearing surface; a transducer area, having at least one transducer designed for reading and/or writing to the magnetic tape; a cavity open on the tape-bearing surface adjacent to the transducer area that extends parallel to the transducer area and transversally to the longitudinal direction of circulation of the tape such that an opening of the cavity faces the tape in operation; and one or more air bleed slots connected to the cavity. The cavity is further dimensioned and arranged with respect to the transducer area to create, upon circulation of the tape in operation, sub-ambient pressure therein.Type: GrantFiled: August 8, 2017Date of Patent: January 1, 2019Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Johan B. C. Engelen, Mark A. Lantz, Hugo E. Rothuizen
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Patent number: 10091909Abstract: The invention relates to a cooling arrangement comprising a heat spreader (2) comprising a first surface (5), a second surface (8), at least one heat absorption chamber (9) and at least one heat dissipation chamber (10), the at least one heat absorption chamber (9) being in thermal contact with the first surface (5) and the at least one heat dissipation chamber (10) being in thermal contact with the second surface (8) and hydraulically coupled to the at least one heat absorption chamber (9). A cooling fluid (13) can be driven from the heat absorption chamber (9) to the heat dissipation chamber (10) using a plurality of flow patterns for cooling the first surface (5).Type: GrantFiled: February 26, 2015Date of Patent: October 2, 2018Assignee: GLOBALFOUNDRIES INC.Inventors: Thomas J. Brunschwiler, Urs Kloter, Ryan Joseph Linderman, Bruno Michel, Hugo E. Rothuizen, Reio Waelchli
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Publication number: 20180277149Abstract: An apparatus, according to one embodiment, includes: a module; and a plurality of tunnel valve read transducers arranged in an array extending along the module. Each of the tunnel valve read transducers includes: a sensor structure having a tunnel barrier layer and a free layer. Moreover, each of the tunnel valve read transducers includes a pair of hard bias magnets which sandwich the respective sensor structure therebetween, the hard bias magnets being positioned on opposite sides of the sensor structure along a cross-track direction. Furthermore, a thickness of each of the hard bias magnets at a thickest portion thereof is at least 10 times greater than a thickness of the free layer. Other systems, methods, and computer program products are described in additional embodiments.Type: ApplicationFiled: May 31, 2018Publication date: September 27, 2018Inventors: Robert G. Biskeborn, Hugo E. Rothuizen
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Publication number: 20180247664Abstract: An apparatus, according to one embodiment, includes: a module, and a plurality of tunnel valve read transducers arranged in an array extending along the module. Each of the tunnel valve read transducers includes: a sensor structure, an upper magnetic shield, a lower magnetic shield, an upper conducting spacer layer between the sensor structure and the upper magnetic shield, a lower conducting spacer layer between the sensor structure and the lower magnetic shield, and electrically insulating layers on opposite sides of the sensor structure. The sensor structure includes a cap layer, a free layer, a tunnel barrier layer, a reference layer and an antiferromagnetic layer. Moreover, a height of the free layer measured in a direction perpendicular to a media bearing surface of the module is less than a width of the free layer measured in a cross-track direction perpendicular to an intended direction of media travel.Type: ApplicationFiled: February 28, 2017Publication date: August 30, 2018Inventors: Robert G. Biskeborn, Hugo E. Rothuizen
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Patent number: 10062398Abstract: An apparatus, according to one embodiment, includes: a module, and a plurality of tunnel valve read transducers arranged in an array extending along the module. Each of the tunnel valve read transducers includes: a sensor structure, an upper magnetic shield, a lower magnetic shield, an upper conducting spacer layer between the sensor structure and the upper magnetic shield, a lower conducting spacer layer between the sensor structure and the lower magnetic shield, and electrically insulating layers on opposite sides of the sensor structure. The sensor structure includes a cap layer, a free layer, a tunnel barrier layer, a reference layer and an antiferromagnetic layer. Moreover, a height of the free layer measured in a direction perpendicular to a media bearing surface of the module is less than a width of the free layer measured in a cross-track direction perpendicular to an intended direction of media travel.Type: GrantFiled: February 28, 2017Date of Patent: August 28, 2018Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Hugo E. Rothuizen
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Patent number: 10062397Abstract: A tape head is provided for reading and/or writing to a magnetic tape. The tape head including a step-like cross-sectional profile, so as to exhibit a riser between two treads, the latter respectively formed by a tape-bearing surface and a recessed surface, wherein: the tape-bearing surface is essentially flat and configured to contact a magnetic tape, and comprises at least one transducer, the latter being a read or a write element, configured to read or write to the magnetic tape, respectively; and the recessed surface is recessed from the tape-bearing surface by a distance h corresponding to a height of the riser, a width w of the recessed surface along a direction parallel to a longitudinal direction z of circulation of the tape being such that a ratio h/w is at least of 0.01. Related tape head apparatuses for recording or reproducing multi-track tapes are also provided.Type: GrantFiled: February 12, 2016Date of Patent: August 28, 2018Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Johan Engelen, Mark A. Lantz, Hugo E. Rothuizen
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Patent number: 10002627Abstract: A tape head including a body exhibiting a tape-bearing area is provided. The body includes at least one transducer that is a read element or a write element, configured in the tape head so as for the tape head to read from or write to a magnetic tape, in operation. The tape-bearing area is essentially covered by an electrically conducting layer of material. This way, the exposed surface of the electrically conducting layer essentially forms the tape-bearing surface of the tape head, which surface contacts the magnetic tape, in operation. A tape head apparatus for recording or reproducing multi-track tapes including the tape head is also provided.Type: GrantFiled: August 24, 2017Date of Patent: June 19, 2018Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, Johan Engelen, Mark A. Lantz, Hugo E. Rothuizen
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Publication number: 20180120370Abstract: A computer-implemented method includes, by one or more processors in electronic communication with a tunneling magnetoresistive sensor, wherein the tunneling magnetoresistive sensor is a component of a magnetic storage drive configured to read magnetic data from a magnetic storage medium, detecting a short across the tunneling magnetoresistive sensor, measuring a change in resistance of the tunneling magnetoresistive sensor, measuring a change in voltage amplitude for the tunneling magnetoresistive sensor, and dividing said change in voltage amplitude by said change in resistance to yield a ratio. The computer-implemented method further includes, responsive to the ratio being greater than a predetermined ratio threshold, determining that the short is caused by a magnetic shunt. A corresponding computer program product and computer system are also disclosed.Type: ApplicationFiled: December 29, 2017Publication date: May 3, 2018Inventors: Robert G. Biskeborn, Wlodzimierz S. Czarnecki, Icko E. T. Iben, Hugo E. Rothuizen