Patents by Inventor Jyh-Shuey Lo
Jyh-Shuey Lo 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: 8230582Abstract: One preferred method for use in making a device structure with use of the resist channel shrinking solution includes the steps of forming a first pedestal portion within a channel of a patterned resist; applying a resist channel shrinking solution comprising a resist channel shrinking film and corrosion inhibitors within the channel of the patterned resist; baking the resist channel shrinking solution over the patterned resist to thereby reduce a width of the channel of the patterned resist; removing the resist channel shrinking solution; and forming a second pedestal portion within the reduced-width channel of the patterned resist. Advantageously, the oxide layer and the corrosion inhibitors of the resist channel shrinking solution reduce corrosion in the pedestal during the act of baking the resist channel shrinking solution.Type: GrantFiled: January 11, 2010Date of Patent: July 31, 2012Assignee: HGST Netherlands B.V.Inventors: Christian Rene Bonhote, Jila Tabib, Dennis Richard Mckean, Daniel Wayne Bedell, Jyh-Shuey Lo, Heiu Lam, Kim Y Lee
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Patent number: 7716813Abstract: A method is disclosed for independently controlling track width and bevel angle of a write pole tip of a magnetic recording head. The method includes establishing the track width in the pole tip layer material utilizing E-beam lithography. A portion of this pole tip material having the established track width is protected by providing a temporary masking material to make a protected portion. At least one unprotected portion is left exposed to be shaped. This unprotected portion is then beveled to produce at least one beveled portion. The protected portion produces an upper pole tip portion which together with the beveled portion produce an improved pole tip. Also disclosed is a magnetic head having the improved pole tip, and a disk drive having a magnetic head having the improved pole tip.Type: GrantFiled: December 5, 2006Date of Patent: May 18, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Kim Y. Lee, Jyh-Shuey Lo
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Publication number: 20100107402Abstract: One preferred method for use in making a device structure with use of the resist channel shrinking solution includes the steps of forming a first pedestal portion within a channel of a patterned resist; applying a resist channel shrinking solution comprising a resist channel shrinking film and corrosion inhibitors within the channel of the patterned resist; baking the resist channel shrinking solution over the patterned resist to thereby reduce a width of the channel of the patterned resist; removing the resist channel shrinking solution; and forming a second pedestal portion within the reduced-width channel of the patterned resist. Advantageously, the oxide layer and the corrosion inhibitors of the resist channel shrinking solution reduce corrosion in the pedestal during the act of baking the resist channel shrinking solution.Type: ApplicationFiled: January 11, 2010Publication date: May 6, 2010Applicant: HITACHI GLOBAL STORAGE TECHNOLOGIESInventors: Christian Rene Bonhote, Jila Tabib, Dennis Richard Mckean, Daniel Wayne Bedell, Jyh-Shuey Lo, Hieu Lam, Kim Y. Lee
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Patent number: 7675709Abstract: A magnetic write head structure that maximizes write field strength while minimizing stray fields. The write pole structure maximizes write field strength by minimizing saturation of the magnetic pole tips, and minimizes stray field writing by preventing magnetic fields from extending laterally from the sides of the magnetic pole. The write head structure includes a write pole having a pole tip configured with a stair notched shape and a steep shouldered base beneath the stair notched portion. This configuration maximizes the amount of flux that can be delivered to the pole tip while also avoiding stray fields. The magnetic pole can also be configured with wing shaped extensions that extend laterally from the pole tip region but which are recessed from the ABS by a desired amount.Type: GrantFiled: September 21, 2006Date of Patent: March 9, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Hung-Chin Guthrie, Wen-Chien David Hsiao, Jyh-Shuey Lo, Aron Pentek
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Patent number: 7652855Abstract: A lead overlay design of a magnetic sensor is described with sensor and free layer dimensions such that the free layer is stabilized by the large demagnetization field due to the shape anisotropy. In one embodiment the giant magnetoresistive (GMR) effect under the leads is destroyed by removing the antiferromagnetic (AFM) and pinned layers above the free layer. The overlaid lead pads are deposited on the exposed spacer layer at the sides of the mask that defines the active region. In other embodiment a layer of electrically insulating material is deposited over the sensor to encapsulate it and thereby insulate it from contact with the hardbias structures. Various embodiments with self-aligned leads are also described. In a variation of the encapsulation embodiment, the insulating material is also deposited under the lead pads so the electrical current is channeled through the active region of the sensor and sidewall deposited lead pads.Type: GrantFiled: November 9, 2006Date of Patent: January 26, 2010Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: James Mac Freitag, David Eugene Heim, Kuok San Ho, Wipul Pemsiri Jayasekara, Kim Y. Lee, Tsann Lin, Jyh-Shuey Lo, Mustafa Michael Pinarbasi, Ching Hwa Tsang
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Patent number: 7612964Abstract: A magnetic write head and method of manufacture thereof that has a first pole structure having a notched structure configured with a steep shoulder portion and a narrow vertical notch portion extending from the top of the steep shoulder portion. The write head also includes a second pole structure (P2) that has a very narrow width (track width) and that is self aligned with the narrow vertical notch structure of the first pole structure. The write head provides excellent magnetic properties including a very narrow track width and minimal side writing, while avoiding magnetic saturation of the poles.Type: GrantFiled: September 15, 2005Date of Patent: November 3, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Daniel Wayne Bedell, Hieu Lam, Kim Y. Lee, Jyh-Shuey Lo
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Patent number: 7593186Abstract: A magnetic disk drive head is disclosed including a write head, which includes a P1 layer having a pedestal portion, a gap layer formed on the P1 layer, and a P2 layer formed on the gap layer. The P1 layer includes a shoulder formation having a neck portion and a beveled portion. Also disclosed is a disk drive having a write head with a P1 layer with shoulder formation, and a method for fabricating a write pole for a magnetic recording head having a P1 layer with shoulder formation.Type: GrantFiled: January 31, 2005Date of Patent: September 22, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Daniel Wayne Bedell, Hung-Chin Guthrie, Ming Jiang, Hieu Lam, Jyh-Shuey Lo, Edward Hin Pong Lee, Aron Pentek
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Patent number: 7554764Abstract: A lift-off method for forming write pole of a magnetic write head and write pole formed thereby is disclosed. A write pole including a hard mask on a top portion of the write pole is formed. A layer of material for reinforcing sidewall fencing of the write pole is deposited. Portions of the layer of material on top of the write pole are removed while the layer of material at the sidewall fencing is left to provide support to the sidewall fencing.Type: GrantFiled: April 7, 2006Date of Patent: June 30, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Hamid Balamane, Jyh-Shuey Lo, Yi Zheng
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Patent number: 7549213Abstract: A method for independently controlling track width and bevel angle of a write pole tip having a P3 pole tip for perpendicular recording. The method includes establishing the track width in a portion of the P3 layer material. A portion of this portion having the established track width is protected by providing a temporary masking material to make a protected portion. At least one unprotected portion is left exposed to be shaped. This unprotected portion is then beveled to produce at least one beveled portion having a bevel angle. The protected portion produces a rectangular portion which together with the beveled portion produce a hexagonal pole tip. Also a magnetic head having a hexagonal pole tip, and a disk drive having a magnetic head having a hexagonal pole tip.Type: GrantFiled: January 12, 2005Date of Patent: June 23, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Yimin Hsu, Jyh-Shuey Lo
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Patent number: 7551397Abstract: A magnetic write head and method of manufacture thereof that has a first pole structure having a step notched first pole structure. The step notched structure includes a bottom notched portion that is wider than the second notched portion formed thereover. The upper, or narrower, notched portion has a width that is substantially equal to and self aligned with a second pole structure (P2) formed thereover. The invention may also include first and second wing portions formed in the first pole that are recessed from the ABS and that extend laterally from the first notched portions of the first pole. The formation of the winged portions is assisted by an ion mill resistant bump (alumina bump) formed thereover, which acts as a mask during the ion milling operations that are used to form the first and second notches.Type: GrantFiled: September 2, 2005Date of Patent: June 23, 2009Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Bin V. Cao, Hung-Chin Guthrie, Wen-Chien Hsiao, Jyh-Shuey Lo
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Patent number: 7536774Abstract: A method and apparatus for integrating a stair notch and a gap bump at a pole tip in a write head is disclosed. A protective plated layer is formed over the bump to prevent the bump form being damaged during formation of the notch at the pole tip. The flux from the second pole outside of the track will be effectively channeled to the first pole piece under the alumina bump.Type: GrantFiled: April 7, 2006Date of Patent: May 26, 2009Assignee: Hitachi Global Storage Technologies B.V.Inventors: Daniel Wayne Bedell, Wen-Chien David Hsiao, Ming Jiang, Hieu Lam, Kim Y. Lee, Jyh-Shuey Lo, Aron Pentek
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Patent number: 7395595Abstract: A method for forming a P3 layer with NiFe and alumina mask using resist shrink process for use in perpendicular magnetic write heads. The method includes forming a laminated layer, forming an alumina layer on top of the laminated layer, depositing a conductive layer onto the laminated layer, forming a plating frame on a gap layer. The plating frame has a trench defined by plating track, the alumina, laminated and conductive layers each including an area below the trench. The method further includes shrinking the trench, plating NiFe into a portion of the shrunk trench, stripping the plating frame, removing the conductive layer except the conductive layer formed below the trench, removing the alumina layer except the alumina layer formed below the trench, removing the laminated layer except the laminated layer formed below the trench and patterning the laminated layer formed below the trench.Type: GrantFiled: April 19, 2005Date of Patent: July 8, 2008Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Kim Yang Lee, Jyh-Shuey Lo, Yi Zheng
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Publication number: 20080127481Abstract: A method is disclosed for independently controlling track width and bevel angle of a write pole tip of a magnetic recording head. The method includes establishing the track width in the pole tip layer material utilizing E-beam lithography. A portion of this pole tip material having the established track width is protected by providing a temporary masking material to make a protected portion. At least one unprotected portion is left exposed to be shaped. This unprotected portion is then beveled to produce at least one beveled portion. The protected portion produces an upper pole tip portion which together with the beveled portion produce an improved pole tip. Also disclosed is a magnetic head having the improved pole tip, and a disk drive having a magnetic head having the improved pole tip.Type: ApplicationFiled: December 5, 2006Publication date: June 5, 2008Inventors: Kim Y. Lee, Jyh-Shuey Lo
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Publication number: 20080112090Abstract: A lead overlay design of a magnetic sensor is described with sensor and free layer dimensions such that the free layer is stabilized by the large demagnetization field due to the shape anisotropy. In one embodiment the giant magnetoresistive (GMR) effect under the leads is destroyed by removing the antiferromagnetic (AFM) and pinned layers above the free layer. The overlaid lead pads are deposited on the exposed spacer layer at the sides of the mask that defines the active region. In other embodiment a layer of electrically insulating material is deposited over the sensor to encapsulate it and thereby insulate it from contact with the hardbias structures. Various embodiments with self-aligned leads are also described. In a variation of the encapsulation embodiment, the insulating material is also deposited under the lead pads so the electrical current is channeled through the active region of the sensor and sidewall deposited lead pads.Type: ApplicationFiled: November 9, 2006Publication date: May 15, 2008Inventors: James Mac Freitag, David Eugene Heim, Kuok San Ho, Wipul Pemsiri Jayasekara, Kim Y. Lee, Tsann Lin, Jyh-Shuey Lo, Mustafa Michael Pinarbasi, Ching Hwa Tsang
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Publication number: 20080074782Abstract: A magnetic write head structure that maximizes write field strength while minimizing stray fields. The write pole structure maximizes write field strength by minimizing saturation of the magnetic pole tips, and minimizes stray field writing by preventing magnetic fields from extending laterally from the sides of the magnetic pole. The write head structure includes a write pole having a pole tip configured with a stair notched shape and a steep shouldered base beneath the stair notched portion. This configuration maximizes the amount of flux that can be delivered to the pole tip while also avoiding stray fields. The magnetic pole can also be configured with wing shaped extensions that extend laterally from the pole tip region but which are recessed from the ABS by a desired amount.Type: ApplicationFiled: September 21, 2006Publication date: March 27, 2008Inventors: Hung-Chin Guthrie, Wen-Chien David Hsiao, Jyh-Shuey Lo, Aron Pentek
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Publication number: 20080002309Abstract: A magnetic head is disclosed which includes a hexagonal write head pole tip, having a P3 pole tip having a rectangular portion in which the track width is established, and a beveled portion having beveled wall portions. Also disclosed is a disk drive having a magnetic head having a hexagonal pole tip.Type: ApplicationFiled: September 5, 2007Publication date: January 3, 2008Inventors: Yimin Hsu, Jyh-Shuey Lo
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Publication number: 20070236832Abstract: A lift-off method for forming write pole of a magnetic write head and write pole formed thereby is disclosed. A write pole including a hard mask on a top portion of the write pole is formed. A layer of material for reinforcing sidewall fencing of the write pole is deposited. Portions of the layer of material on top of the write pole are removed while the layer of material at the sidewall fencing is -left to provide support to the sidewall fencing.Type: ApplicationFiled: April 7, 2006Publication date: October 11, 2007Inventors: Hamid Balamane, Jyh-Shuey Lo, Yi Zheng
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Publication number: 20070236833Abstract: A method and apparatus for integrating a stair notch and a gap bump at a pole tip in a write head is disclosed. A protective plated layer is formed over the bump to prevent the bump form being damaged during formation of the notch at the pole tip. The flux from the second pole outside of the track will be effectively channeled to the first pole piece under the alumina bump.Type: ApplicationFiled: April 7, 2006Publication date: October 11, 2007Inventors: Daniel Bedell, Wen-Chien Hsiao, Ming Jiang, Hieu Lam, Kim Lee, Jyh-Shuey Lo, Aron Pentek
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Publication number: 20070058293Abstract: A magnetic write head and method of manufacture thereof that has a first pole structure having a notched structure configured with a steep shoulder portion and a narrow vertical notch portion extending from the top of the steep shoulder portion. The write head also includes a second pole structure (P2) that has a very narrow width (track width) and that is self aligned with the narrow vertical notch structure of the first pole structure. The write head provides excellent magnetic properties including a very narrow track width and minimal side writing, while avoiding magnetic saturation of the poles.Type: ApplicationFiled: September 15, 2005Publication date: March 15, 2007Inventors: Daniel Bedell, Hieu Lam, Kim Lee, Jyh-Shuey Lo
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Publication number: 20070053102Abstract: A magnetic write head and method of manufacture thereof that has a first pole structure having a step notched first pole structure. The step notched structure includes a bottom notched portion that is wider than the second notched portion formed thereover. The upper, or narrower, notched portion has a width that is substantially equal to and self aligned with a second pole structure (P2) formed thereover. The invention may also include first and second wing portions formed in the first pole that are recessed from the ABS and that extend laterally from the first notched portions of the first pole. The formation of the winged portions is assisted by an ion mill resistant bump (alumina bump) formed thereover, which acts as a mask during the ion milling operations that are used to form the first and second notches.Type: ApplicationFiled: September 2, 2005Publication date: March 8, 2007Inventors: Bin Cao, Hung-Chin Guthrie, Wen-Chien Hsiao, Jyh-Shuey Lo