Patents by Inventor Thomas Y. Chang
Thomas Y. Chang 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: 11925739Abstract: An implantable or wearable kidney enclosure that is cylindrical, ovoid, or otherwise non-angular e.g., not rectangular or cuboid), having a circular or oval hemofilter that provides a blood flow pattern from an internal, central artery source radially outwards. Due to the efficient flow of the circular filter design, the enclosure can be made in a cylindrical low profile shape, resulting in a compact enclosure highly suitable for implantable and wearable dialysis applications.Type: GrantFiled: October 21, 2020Date of Patent: March 12, 2024Assignee: SEAGATE TECHNOLOGY LLCInventor: Thomas Y. Chang
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Patent number: 11011203Abstract: A heat-assisted magnetic recording device includes a granular magnetic recording layer and a thermal absorption layer formed on top of the magnetic recording layer. The thermal absorption layer is patterned to include rows extending in a cross-track direction of the magnetic media, each adjacent pair of the rows being separated from one another by an insulating material.Type: GrantFiled: April 30, 2020Date of Patent: May 18, 2021Assignee: SEAGATE TECHNOLOGY LLCInventors: Thomas Y. Chang, Philip L. Steiner, Paul M. Jones
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Publication number: 20210121619Abstract: An implantable or wearable kidney enclosure that is cylindrical, ovoid, or otherwise non-angular e.g., not rectangular or cuboid), having a circular or oval hemofilter that provides a blood flow pattern from an internal, central artery source radially outwards. Due to the efficient flow of the circular filter design, the enclosure can be made in a cylindrical low profile shape, resulting in a compact enclosure highly suitable for implantable and wearable dialysis applications.Type: ApplicationFiled: October 21, 2020Publication date: April 29, 2021Inventor: Thomas Y. Chang
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Patent number: 10950268Abstract: A method of forming a patterned media includes constraining growth of magnetic grains in a down-track direction without constraining the growth in a radial direction to cause the magnetic grains to align in rows extending in the radial direction. The patterned media may allow for data track radial width to be defined independent of grain size.Type: GrantFiled: December 20, 2019Date of Patent: March 16, 2021Assignee: SEAGATE TECHNOLOGY LLCInventors: Thomas Y. Chang, Philip L. Steiner, Xiaomin Yang, Bin Lu
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Patent number: 10096334Abstract: Apparatus and method for magnetic recording media. A rotatable magnetic recording disc has an outermost annular sidewall that extends at nominally 97 millimeters, mm for a 3-½ inch form factor data storage device or at nominally 67 mm for a 2-½ inch form factor data storage device. The rotatable magnetic recording disc further has a disc shaped substrate of metal or glass, and a magnetic recording layer supported by the disc shaped substrate and configured to magnetically record data along concentric tracks.Type: GrantFiled: October 23, 2017Date of Patent: October 9, 2018Assignee: Seagate Technology LLCInventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Patent number: 9911446Abstract: A three dimensional magnetic recording media can consist of a coupling layer disposed between first and second vertically stacked recording layers. The coupling layer can provide exchange or antiferromagnetic coupling and allow the respective recording layers to be individually heat selected to different first and second coupling strengths through application of heat from a heat source.Type: GrantFiled: July 3, 2017Date of Patent: March 6, 2018Assignee: Seagate Technology LLCInventors: Joachim Ahner, David M. Tung, Ganping Ju, Philip L. Steiner, Thomas P. Nolan, Thomas Y. Chang, Pin-Wei Huang, Kaizhong Gao, Timothy Klemmer, David S. Kuo
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Publication number: 20180047421Abstract: Apparatus and method for magnetic recording media. A rotatable magnetic recording disc has an outermost annular sidewall that extends at nominally 97 millimeters, mm for a 3½ inch form factor data storage device or at nominally 67 mm for a 2½ inch form factor data storage device. The rotatable magnetic recording disc further has a disc shaped substrate of metal or glass, and a magnetic recording layer supported by the disc shaped substrate and configured to magnetically record data along concentric tracks.Type: ApplicationFiled: October 23, 2017Publication date: February 15, 2018Inventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Patent number: 9799364Abstract: An enlarged substrate configuration for magnetic recording media. In some embodiments, an apparatus comprises a disc shaped member of metal or glass configured as a substrate for a magnetic data recording disc for a 2½ inch form factor data storage device or a 3½ inch form factor data storage device. The disc shaped member has a top planar surface, an opposing bottom planar surface, an outermost annular sidewall that extends between the top planar surface and the bottom planar surface at an outermost diameter of nominally 67 or 97 millimeters, respectively, and an inner annular sidewall that extends between the top planar surface and the bottom planar surface to define a central aperture.Type: GrantFiled: May 15, 2017Date of Patent: October 24, 2017Assignee: Seagate Technology LLCInventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Patent number: 9799362Abstract: A three dimensional magnetic recording medium can consist of a first recording layer vertically stacked with a second recording layer. The first stacked recording layer may be tuned with at least one discrete track physically separating multiple data tracks in the first recording layer or tuned by being configured as a bit patterned media.Type: GrantFiled: May 26, 2016Date of Patent: October 24, 2017Assignee: Seagate Technology LLCInventors: Kim Yang Lee, Thomas P. Nolan, Philip L. Steiner, Thomas Y. Chang, Koichi Wago
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Publication number: 20170249967Abstract: An enlarged substrate configuration for magnetic recording media. In some embodiments, an apparatus comprises a disc shaped member of metal or glass configured as a substrate for a magnetic data recording disc for a 2½ inch form factor data storage device or a 3½ inch form factor data storage device. The disc shaped member has a top planar surface, an opposing bottom planar surface, an outermost annular sidewall that extends between the top planar surface and the bottom planar surface at an outermost diameter of nominally 67 or 97 millimeters, respectively, and an inner annular sidewall that extends between the top planar surface and the bottom planar surface to define a central aperture.Type: ApplicationFiled: May 15, 2017Publication date: August 31, 2017Inventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Patent number: 9697857Abstract: A three dimensional magnetic recording media can consist of a coupling layer disposed between first and second vertically stacked recording layers. The coupling layer can provide exchange or antiferromagnetic coupling and allow the respective recording layers to be individually heat selected to different first and second coupling strengths through application of heat from a heat source.Type: GrantFiled: May 26, 2016Date of Patent: July 4, 2017Assignee: Seagate Technology LLCInventors: Joachim Ahner, David M. Tung, Ganping Ju, Philip L. Steiner, Thomas P. Nolan, Thomas Y. Chang, Pin-Wei Huang, Kaizhong Gao, Timothy Klemmer, David S. Kuo
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Patent number: 9653112Abstract: A data storage device having a housing member for a selected one of a 3½ inch form factor hard disc drive (HDD) or a 2½ inch form factor HDD. A spindle motor coupled to the housing member supports a rotatable data recording disc with a plurality of data tracks and an outermost perimeter. The outermost perimeter has an average overall radius of 48.5 millimeters, mm responsive to the housing member being for a 3½ inch form factor HDD or an average overall radius of 33.5 mm responsive to the housing member being for a 2½ inch form factor HDD. The rotatable data recording disc further has an outermost data track at an average selected radius such that the difference between the average overall radius of the outermost perimeter and the average selected radius is more than 1 mm.Type: GrantFiled: November 28, 2016Date of Patent: May 16, 2017Assignee: Seagate Technology LLCInventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Publication number: 20170076750Abstract: A data storage device having a housing member for a selected one of a 3½ inch form factor hard disc drive (HDD) or a 2½ inch form factor HDD. A spindle motor coupled to the housing member supports a rotatable data recording disc with a plurality of data tracks and an outermost perimeter. The outermost perimeter has an average overall radius of 48.5 millimeters, mm responsive to the housing member being for a 3½ inch form factor HDD or an average overall radius of 33.5 mm responsive to the housing member being for a 2½ inch form factor HDD. The rotatable data recording disc further has an outermost data track at an average selected radius such that the difference between the average overall radius of the outermost perimeter and the average selected radius is more than 1 mm.Type: ApplicationFiled: November 28, 2016Publication date: March 16, 2017Inventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Patent number: 9543174Abstract: A material handling apparatus adapted to support a plurality of disc-shaped platters, such as but not limited to a cassette assembly adapted to support data recording media or substrates during manufacturing. In some embodiments, a cassette assembly includes a base cassette with a base and opposing sidewalls configured to support an outermost perimeter of each of a first plurality of disc-shaped platters having a first diameter. An insert contactingly engages the base cassette. The insert has a plurality of spaced apart grooves to contactingly support an outermost perimeter of each of a second plurality of disc-shaped platters having a different, second diameter.Type: GrantFiled: August 24, 2015Date of Patent: January 10, 2017Assignee: Seagate Technology LLCInventors: David V. Dougherty, Ian J. Beresford, Donald E. Curtiss, Thomas Y. Chang
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Patent number: 9508374Abstract: A hard disc drive (HDD) with an enlarged magnetic recording disc. In some embodiments, a base deck and top cover are arranged to provide an HDD housing with a 2½ inch form factor or a 3½ inch form factor. A magnetic recording disc is supported for rotation within the housing. A data transducer is controllably advanced across a recording surface of the magnetic recording disc to write data to the recording surface, and a printed circuit board assembly (PCBA) affixed to an external surface of the base deck incorporates control electronics to provide write signals to the data transducer during the writing of data to the recording surface. The disc has an outer diameter of at least 67 millimeters, mm for the 2½ inch form factor housing and has an outer diameter of at least 97 mm for the 3½ inch form factor housing.Type: GrantFiled: June 6, 2016Date of Patent: November 29, 2016Assignee: Seagate Technology LLCInventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Publication number: 20160284373Abstract: A hard disc drive (HDD) with an enlarged magnetic recording disc. In some embodiments, a base deck and top cover are arranged to provide an HDD housing with a 2½ inch form factor or a 3½ inch form factor. A magnetic recording disc is supported for rotation within the housing. A data transducer is controllably advanced across a recording surface of the magnetic recording disc to write data to the recording surface, and a printed circuit board assembly (PCBA) affixed to an external surface of the base deck incorporates control electronics to provide write signals to the data transducer during the writing of data to the recording surface. The disc has an outer diameter of at least 67 millimeters, mm for the 2½ inch form factor housing and has an outer diameter of at least 97 mm for the 3½ inch form factor housing.Type: ApplicationFiled: June 6, 2016Publication date: September 29, 2016Inventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Patent number: 9361925Abstract: An enlarged substrate for a magnetic recording medium used in a data storage device such as a hard disc drive (HDD). In some embodiments, a data storage device has a housing member for a 3½ inch form factor storage device or a 2½ inch form factor storage device. A rotatable data recording disc is supported by the housing member. The disc has a plurality of tracks formed thereon. At least one track of the plurality of tracks has an average radius of greater than 47.5 mm for the 3½ inch form factor storage device or greater than 32.5 mm for the 2½ inch form factor storage device. A data read/write transducer is configured to be controllably advanced across a recording surface of the data recording disc and to record data to the plurality of tracks.Type: GrantFiled: January 4, 2016Date of Patent: June 7, 2016Assignee: Seagate Technology LLCInventors: Koji Adachi, Ian J. Beresford, Thomas Y Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Publication number: 20160118072Abstract: An enlarged substrate for a magnetic recording medium used in a data storage device such as a hard disc drive (HDD). In some embodiments, a data storage device has a housing member for a 3½ inch form factor storage device or a 2½ inch form factor storage device. A rotatable data recording disc is supported by the housing member. The disc has a plurality of tracks formed thereon. At least one track of the plurality of tracks has an average radius of greater than 47.5 mm for the 3½ inch form factor storage device or greater than 32.5 mm for the 2½ inch form factor storage device. A data read/write transducer is configured to be controllably advanced across a recording surface of the data recording disc and to record data to the plurality of tracks.Type: ApplicationFiled: January 4, 2016Publication date: April 28, 2016Inventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Patent number: 9240201Abstract: An enlarged substrate for a magnetic recording medium used in a data storage device such as a hard disc drive (HDD). In some embodiments, an apparatus includes a substrate for a magnetic recording disc for installation in a 3½ inch form factor hard disc drive, the substrate having an overall diameter of nominally from 96.9 mm to 100.4 mm. In other embodiments, an apparatus comprises a substrate for a magnetic recording disc for installation in a 2½ inch form factor hard disc drive, the substrate having an overall diameter of nominally from 66.9 mm to 71.8 mm. In other embodiments, a data storage device has a magnetic recording medium that uses an enlarged substrate as set forth above.Type: GrantFiled: August 24, 2015Date of Patent: January 19, 2016Assignee: Seagate Technology LLCInventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez
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Publication number: 20150364149Abstract: An enlarged substrate for a magnetic recording medium used in a data storage device such as a hard disc drive (HDD). In some embodiments, an apparatus includes a substrate for a magnetic recording disc for installation in a 3- 1/2 inch form factor hard disc drive, the substrate having an overall diameter of nominally from 96.9 mm to 100.4 mm. In other embodiments, an apparatus comprises a substrate for a magnetic recording disc for installation in a 2- 1/2 inch form factor hard disc drive, the substrate having an overall diameter of nominally from 66.9 mm to 71.8 mm. In other embodiments, a data storage device has a magnetic recording medium that uses an enlarged substrate as set forth above.Type: ApplicationFiled: August 24, 2015Publication date: December 17, 2015Inventors: Koji Adachi, Ian J. Beresford, Thomas Y. Chang, Kuo Hsing Hwang, James Hennessy, David Perez