Patents by Inventor W. Stanley Czarnecki
W. Stanley Czarnecki 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: 10832725Abstract: In one embodiment, a computer program product for determining a wrap angle includes a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se. The program instructions are executable by a processor to cause the processor to perform a method that includes receiving, by the processor, a measurement of a distance from an edge to a transducer, receiving, by the processor, a predefined height of tenting of a magnetic recording tape above the transducer, and determining, by the processor, a wrap angle for inducing tenting of the magnetic recording tape above the transducer at the predefined height when the magnetic recording tape passes over the edge in a direction of tape travel thereacross.Type: GrantFiled: June 19, 2019Date of Patent: November 10, 2020Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
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Patent number: 10818315Abstract: An apparatus according to one embodiment includes a magnetic head having at least two tunneling magnetoresistance sensors, where a resistance of a tunnel barrier of each of the tunneling magnetoresistance sensors of the magnetic head is about 25 ohms or less, a drive mechanism for passing a magnetic medium over the magnetic head, and a controller electrically coupled to the magnetic head. In addition, the controller includes a biasing circuit, where the biasing circuit restricts a maximum voltage drop across the tunnel barrier.Type: GrantFiled: January 9, 2019Date of Patent: October 27, 2020Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Jason Liang, Calvin S. Lo
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Patent number: 10734023Abstract: A tape drive, according to one embodiment, includes: a processor, and logic which is integrated with the processor, executable by the processor, or integrated with and executable by the processor. The logic is configured to: determine whether a difference between information and corresponding design values is in a range. The information corresponds to how an array of writers write and/or are expected to write to a magnetic medium during shingled recording. Moreover, the logic is configured to: compute, using the information, data describing a lateral writing position to use during writing such that shingled track edges are aligned according to a format in response to determining that the difference between the information and corresponding design values is not in the range.Type: GrantFiled: May 23, 2019Date of Patent: August 4, 2020Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Ernest S. Gale, Jason Liang
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Patent number: 10643654Abstract: A method according to one embodiment includes running a magnetic recording tape over a tape bearing surface of a module having at least one edge, detecting signals from the tape at differing wrap angles for estimating a height of tenting of the tape above a transducer at each of the wrap angles, and selecting a wrap angle to provide about a predefined height of tenting of the tape above the transducer. A resulting tent of the moving magnetic recording tape extends from the edge of the module closest thereto to a minima with a tent apex therebetween, where the minima is at a first point of closest approach of the moving magnetic recording tape to the tape bearing surface of the module nearest the tent apex.Type: GrantFiled: June 18, 2019Date of Patent: May 5, 2020Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
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Patent number: 10643653Abstract: In one embodiment, a method includes determining a distance from a to an edge closest thereto and selecting a wrap angle based on the determined distance for inducing tenting of a moving magnetic recording tape in a region above the transducer whereby a resulting tent of the moving tape extends from the edge closest thereto to a minima with a tent apex therebetween. In response to a determination to move the tape over the tape bearing surface, the method includes moving the tape over the tape bearing surface, and checking for changes in the tenting characteristics. In response to determining changes are present, the method includes sequentially selecting a different wrap angle based on the determined distance for inducing a desired tenting characteristic, and checking for changes in the tenting characteristics. Moreover, the method includes selecting a final wrap angle in response to determining no significant changes are present.Type: GrantFiled: June 18, 2019Date of Patent: May 5, 2020Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
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Publication number: 20190311740Abstract: A method according to one embodiment includes running a magnetic recording tape over a tape bearing surface of a module having at least one edge, detecting signals from the tape at differing wrap angles for estimating a height of tenting of the tape above a transducer at each of the wrap angles, and selecting a wrap angle to provide about a predefined height of tenting of the tape above the transducer. A resulting tent of the moving magnetic recording tape extends from the edge of the module closest thereto to a minima with a tent apex therebetween, where the minima is at a first point of closest approach of the moving magnetic recording tape to the tape bearing surface of the module nearest the tent apex.Type: ApplicationFiled: June 18, 2019Publication date: October 10, 2019Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
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Publication number: 20190304501Abstract: In one embodiment, a method includes determining a distance from a to an edge closest thereto and selecting a wrap angle based on the determined distance for inducing tenting of a moving magnetic recording tape in a region above the transducer whereby a resulting tent of the moving tape extends from the edge closest thereto to a minima with a tent apex therebetween. In response to a determination to move the tape over the tape bearing surface, the method includes moving the tape over the tape bearing surface, and checking for changes in the tenting characteristics. In response to determining changes are present, the method includes sequentially selecting a different wrap angle based on the determined distance for inducing a desired tenting characteristic, and checking for changes in the tenting characteristics. Moreover, the method includes selecting a final wrap angle in response to determining no significant changes are present.Type: ApplicationFiled: June 18, 2019Publication date: October 3, 2019Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
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Publication number: 20190304502Abstract: In one embodiment, a computer program product for determining a wrap angle includes a computer readable storage medium having program instructions embodied therewith, wherein the computer readable storage medium is not a transitory signal per se. The program instructions are executable by a processor to cause the processor to perform a method that includes receiving, by the processor, a measurement of a distance from an edge to a transducer, receiving, by the processor, a predefined height of tenting of a magnetic recording tape above the transducer, and determining, by the processor, a wrap angle for inducing tenting of the magnetic recording tape above the transducer at the predefined height when the magnetic recording tape passes over the edge in a direction of tape travel thereacross.Type: ApplicationFiled: June 19, 2019Publication date: October 3, 2019Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
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Patent number: 10418059Abstract: In one general embodiment, a method includes determining a distance from a transducer of a module to an edge of the module closest thereto, and selecting a wrap angle based on the determined distance for inducing tenting of a moving magnetic recording tape in a region above the transducer. In another general embodiment, a method includes running a magnetic recording tape over a tape bearing surface having at least one edge, and detecting signals from the tape at differing wrap angles for estimating a height of tenting of the tape above a transducer at each of the wrap angles. A wrap angle is selected to provide about a predefined height of tenting of the tape above the transducer.Type: GrantFiled: December 6, 2016Date of Patent: September 17, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo
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Publication number: 20190279673Abstract: A tape drive, according to one embodiment, includes: a processor, and logic which is integrated with the processor, executable by the processor, or integrated with and executable by the processor. The logic is configured to: determine whether a difference between information and corresponding design values is in a range. The information corresponds to how an array of writers write and/or are expected to write to a magnetic medium during shingled recording. Moreover, the logic is configured to: compute, using the information, data describing a lateral writing position to use during writing such that shingled track edges are aligned according to a format in response to determining that the difference between the information and corresponding design values is not in the range.Type: ApplicationFiled: May 23, 2019Publication date: September 12, 2019Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Ernest S. Gale, Jason Liang
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Patent number: 10388311Abstract: A computer-implemented method, according to one embodiment, includes: determining, by the computer, whether a difference between information and corresponding design values is in a range. The information corresponds to how an array of writers write and/or are expected to write to a magnetic medium during shingled recording. Moreover, the computer-implemented method further includes: computing, by the computer and using the information, data describing a lateral writing position to use during writing such that shingled track edges are aligned according to a format in response to determining that the difference between the information and corresponding design values is not in the range.Type: GrantFiled: April 12, 2018Date of Patent: August 20, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Ernest S. Gale, Jason Liang
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Publication number: 20190164572Abstract: An apparatus according to one embodiment includes a magnetic head having at least two tunneling magnetoresistance sensors, where a resistance of a tunnel barrier of each of the tunneling magnetoresistance sensors of the magnetic head is about 25 ohms or less, a drive mechanism for passing a magnetic medium over the magnetic head, and a controller electrically coupled to the magnetic head. In addition, the controller includes a biasing circuit, where the biasing circuit restricts a maximum voltage drop across the tunnel barrier.Type: ApplicationFiled: January 9, 2019Publication date: May 30, 2019Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Jason Liang, Calvin S. Lo
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Patent number: 10262688Abstract: A computer-implemented method for screening a multichannel head, according to one embodiment, includes measuring a channel signal to noise ratio value for each read transducer over a plurality of sense currents, wherein each transducer is one of a plurality of transducers in a multichannel head. The measured channel signal to noise ratio values are compared to a specification of a pre-defined value. The multichannel head is dispositioned to enable the multichannel head to perform to the specification of the pre-defined value, if possible.Type: GrantFiled: January 8, 2018Date of Patent: April 16, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Venus Hipolito
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Patent number: 10229705Abstract: In one general embodiment, an apparatus includes a magnetic head having at least one tunneling magnetoresistance sensor. The resistance of the tunnel barrier of each tunneling magnetoresistance sensor is about 25 ohms or less. In another general embodiment, an apparatus includes a magnetic head having at least one tunneling magnetoresistance sensor. The resistivity of the tunnel barrier of each tunneling magnetoresistance sensor is less than a product of a target resistance of the tunnel barrier and an area of the tunnel barrier. The target resistance is about 25 ohms or less.Type: GrantFiled: January 24, 2017Date of Patent: March 12, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Jason Liang, Calvin S. Lo
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Patent number: 10199059Abstract: A computer-implemented method, according to one embodiment, includes: collecting performance data corresponding to a tape drive and/or a magnetic tape head, storing the performance data in memory, and using the data to perform problem analysis. The performance data includes a resistance of the tape drive and/or magnetic tape head and a resolution of the tape drive and/or the magnetic tape head. Moreover, performing the problem analysis includes: determining a condition of the tape drive and/or the magnetic tape head, wherein the condition is selected from a group consisting of: wear, corrosion, defective leads and wire bonds. Other systems, methods, and computer program products are described in additional embodiments.Type: GrantFiled: February 13, 2017Date of Patent: February 5, 2019Assignee: International Business Machines CorporationInventors: Said A. Ahmad, W. Stanley Czarnecki, Ernest S. Gale, Icko E. T. Iben, Josephine F. Kubista
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Patent number: 10199058Abstract: A method according to one embodiment includes recessing a portion of a media facing side of a module, the module having first and second transducers of different magnetic transducer types positioned towards the media facing side of the module, wherein the different transducer types are selected from a group consisting of data reader transducers, servo reader transducers, write transducers, piggyback read-write transducers and merged read-write transducers; wherein the recess is positioned towards one of the first transducers, wherein the recess forms a first protection structure for protecting the first transducer; and wherein the second transducer has either no protection or is protected by a second protection structure that is different than the first protection structure.Type: GrantFiled: April 19, 2016Date of Patent: February 5, 2019Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Philipp Herget, Calvin S. Lo
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Publication number: 20180233169Abstract: A computer-implemented method, according to one embodiment, includes: determining, by the computer, whether a difference between information and corresponding design values is in a range. The information corresponds to how an array of writers write and/or are expected to write to a magnetic medium during shingled recording. Moreover, the computer-implemented method further includes: computing, by the computer and using the information, data describing a lateral writing position to use during writing such that shingled track edges are aligned according to a format in response to determining that the difference between the information and corresponding design values is not in the range.Type: ApplicationFiled: April 12, 2018Publication date: August 16, 2018Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Ernest S. Gale, Jason Liang
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Publication number: 20180211684Abstract: In one general embodiment, an apparatus includes a magnetic head having at least one tunneling magnetoresistance sensor. The resistance of the tunnel barrier of each tunneling magnetoresistance sensor is about 25 ohms or less. In another general embodiment, an apparatus includes a magnetic head having at least one tunneling magnetoresistance sensor. The resistivity of the tunnel barrier of each tunneling magnetoresistance sensor is less than a product of a target resistance of the tunnel barrier and an area of the tunnel barrier. The target resistance is about 25 ohms or less.Type: ApplicationFiled: January 24, 2017Publication date: July 26, 2018Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Jason Liang, Calvin S. Lo
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Patent number: 10020013Abstract: A computer program product, according to one embodiment, includes a computer readable storage medium having program instructions embodied therewith. The computer readable storage medium is not a transitory signal per se. Moreover, the program instructions readable and/or executable by a controller to cause the controller to perform a method which includes: determining, by the controller, whether a difference between information and corresponding design values is in a range; and computing, by the controller and using the information, data describing a lateral writing position to use during writing such that shingled track edges are aligned according to a format in response to determining that the difference between the information and corresponding design values is not in the range. The information corresponds to how an array of writers write and/or are expected to write to a magnetic medium during shingled recording.Type: GrantFiled: November 29, 2017Date of Patent: July 10, 2018Assignee: International Business Machines CorporationInventors: Robert G. Biskeborn, W. Stanley Czarnecki, Ernest S. Gale, Jason Liang
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Publication number: 20180158478Abstract: In one general embodiment, a method includes determining a distance from a transducer of a module to an edge of the module closest thereto, and selecting a wrap angle based on the determined distance for inducing tenting of a moving magnetic recording tape in a region above the transducer. In another general embodiment, a method includes running a magnetic recording tape over a tape bearing surface having at least one edge, and detecting signals from the tape at differing wrap angles for estimating a height of tenting of the tape above a transducer at each of the wrap angles. A wrap angle is selected to provide about a predefined height of tenting of the tape above the transducer.Type: ApplicationFiled: December 6, 2016Publication date: June 7, 2018Inventors: Robert G. Biskeborn, W. Stanley Czarnecki, Calvin S. Lo