Patents by Inventor Jianxin Zhu
Jianxin Zhu 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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Publication number: 20120025339Abstract: A magnetic tunnel junction cell having a free layer and first pinned layer with perpendicular anisotropy, the cell including a coupling layer between the free layer and a second pinned layer, the coupling layer comprising a phase change material switchable from an antiferromagnetic state to a ferromagnetic state. In some embodiments, at least one actuator electrode proximate the coupling layer transfers a strain from the electrode to the coupling layer to switch the coupling layer from the antiferromagnetic state to the ferromagnetic state. Memory devices and methods are also described.Type: ApplicationFiled: October 12, 2011Publication date: February 2, 2012Applicant: SEAGATE TECHNOLOGY LLCInventor: Jianxin Zhu
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Patent number: 8054677Abstract: A magnetic tunnel junction cell having a free layer and first pinned layer with perpendicular anisotropy, the cell including a coupling layer between the free layer and a second pinned layer, the coupling layer comprising a phase change material switchable from an antiferromagnetic state to a ferromagnetic state. In some embodiments, at least one actuator electrode proximate the coupling layer transfers a strain from the electrode to the coupling layer to switch the coupling layer from the antiferromagnetic state to the ferromagnetic state. Memory devices and methods are also described.Type: GrantFiled: October 9, 2008Date of Patent: November 8, 2011Assignee: Seagate Technology LLCInventor: Jianxin Zhu
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Publication number: 20110157750Abstract: A slider includes a slider body having a first side and edges defined adjacent to the first side, at least two separate insulators each adjacent to the first side of the slider body and supported by the slider body, and a conductive trace adjacent to each of the at least two separate insulators and opposite the first side of the slider body. The at least two separate insulators each are in physical contact with the slider body along the first side of the slider body such that the at least two separate insulators are physically attached to the slider body to electrically insulate each conductive trace from the slider body.Type: ApplicationFiled: March 11, 2011Publication date: June 30, 2011Applicant: SEAGATE TECHNOLOGY LLCInventors: Jianxin Zhu, David A. Sluzewski, Lance E. Stover, Joel W. Hoehn, Kevin J. Schulz
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Patent number: 7929248Abstract: A slider according to the present invention includes a slider body, a plurality of insulators, and conductive traces. The slider body has a first side and edges defined substantially perpendicular to the first side. The plurality of insulators are each adjacent to the first side of the slider body. The conductive traces are adjacent to each of the plurality of insulators and opposite the slider body.Type: GrantFiled: May 23, 2006Date of Patent: April 19, 2011Assignee: Seagate Technology LLCInventors: Jianxin Zhu, David A. Sluzewski, Lance E. Stover, Joel W. Hoehn, Kevin J. Schulz
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Patent number: 7897515Abstract: A method of processing a stack, the method including depositing a fusible material on a first hardmask layer, the first hardmask layer disposed on a surface of a pre-processed stack, the pre-processed stack being disposed on at least a portion of a substrate; heating the fusible material layer to a temperature at or above its melting point to cause it to form a fusible material sphere, the fusible material sphere disposed on less than the entire first hardmask layer; etching the first hardmask layer, wherein the fusible material sphere prevents a portion of the first hardmask layer from etching, thereby forming a second hardmask layer; and etching the pre-processed stack, wherein at least the second hardmask layer prevents a portion of the pre-processed stack from etching, thereby forming a stack.Type: GrantFiled: April 20, 2009Date of Patent: March 1, 2011Assignee: Seagate Technology LLCInventor: Jianxin Zhu
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Publication number: 20110007423Abstract: Recording heads for data storage systems are provided. Recording heads include a substrate layer made of a first material. The substrate layer has a bearing surface side. A tapered feature made of a second material is included on the bearing surface side. The first material is illustratively a multiphase material and the second material is illustratively diamond-like carbon.Type: ApplicationFiled: July 13, 2009Publication date: January 13, 2011Applicant: SEAGATE TECHNOLOGY LLCInventors: Ying Dong, Gregory M. McMahon, Jianxin Zhu, Steve D. Gartner, The Nguyen, Lin Zhou
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Publication number: 20100264500Abstract: A method of processing a stack, the method including depositing a fusible material on a first hardmask layer, the first hardmask layer disposed on a surface of a pre-processed stack, the pre-processed stack being disposed on at least a portion of a substrate; heating the fusible material layer to a temperature at or above its melting point to cause it to form a fusible material sphere, the fusible material sphere disposed on less than the entire first hardmask layer; etching the first hardmask layer, wherein the fusible material sphere prevents a portion of the first hardmask layer from etching, thereby forming a second hardmask layer; and etching the pre-processed stack, wherein at least the second hardmask layer prevents a portion of the pre-processed stack from etching, thereby forming a stack.Type: ApplicationFiled: April 20, 2009Publication date: October 21, 2010Applicant: SEAGATE TECHNOLOGY LLCInventor: Jianxin Zhu
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Publication number: 20100032738Abstract: A magnetic tunnel junction cell having a free layer and first pinned layer with perpendicular anisotropy, the cell including a coupling layer between the free layer and a second pinned layer, the coupling layer comprising a phase change material switchable from an antiferromagnetic state to a ferromagnetic state. In some embodiments, at least one actuator electrode proximate the coupling layer transfers a strain from the electrode to the coupling layer to switch the coupling layer from the antiferromagnetic state to the ferromagnetic state. Memory devices and methods are also described.Type: ApplicationFiled: October 9, 2008Publication date: February 11, 2010Applicant: SEAGATE TECHNOLOGY LLCInventor: Jianxin Zhu
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Publication number: 20080276696Abstract: A topographic profile of a structure is generated using atomic force microscopy. The structure is scanned such that an area of interest of the structure is scanned at a higher resolution than portions of the structure outside of the area of interest. An profile of the structure is then generated based on the scan. To correct skew and tilt of the profile, a first feature of the profile is aligned with a first axis of a coordinate system. The profile is then manipulated to align a second feature of the profile with a second axis of the coordinate system.Type: ApplicationFiled: July 25, 2008Publication date: November 13, 2008Applicant: SEAGATE TECHNOLOGY LLCInventors: Lin Zhou, Huiwen Liu, Dale Egbert, Jonathan A. Nelson, Jianxin Zhu
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Patent number: 7433155Abstract: One aspect of the present invention relates to a slider having a slider body. The slider body includes a bearing surface defining a bearing surface plane, a leading edge, a trailing edge, first side edge, a second side edge and at least one corner. A corner feature is positioned proximate the at least one corner. The corner feature includes a first portion oriented in a first direction and a second portion oriented in a second direction that is different then the first direction. At least one of the first direction and the second direction is toward the trailing edge and is oblique to the bearing surface plane.Type: GrantFiled: December 1, 2004Date of Patent: October 7, 2008Assignee: Seagate Technology LLCInventors: Jianxin Zhu, Zine-Eddine Boutaghou, Zheng Shi
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Patent number: 7406860Abstract: A topographic profile of a structure is generated using atomic force microscopy. The structure is scanned such that an area of interest of the structure is scanned at a higher resolution than portions of the structure outside of the area of interest. An profile of the structure is then generated based on the scan. To correct skew and tilt of the profile, a first feature of the profile is aligned with a first axis of a coordinate system. The profile is then manipulated to align a second feature of the profile with a second axis of the coordinate system.Type: GrantFiled: April 28, 2006Date of Patent: August 5, 2008Assignee: Seagate Technology LLCInventors: Lin Zhou, Huiwen Liu, Dale Egbert, Jonathan A. Nelson, Jianxin Zhu
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Patent number: 7387871Abstract: A method for creating a pattern on an exposure site of a material blank using an exposure apparatus includes providing a mask having a first mask pattern. The mask is positioned between the exposure apparatus and the material blank. The exposure site of the material blank is exposed. One or more additional exposure events are performed for patterning the exposure site of the material blank. Between each exposure event, the exposure site of the material blank is repositioned in a lateral direction with respect to the mask. Between successive exposure events involving the first mask pattern, there is a relative movement between the mask and the material blank of a distance less than or equal to a length of the first mask pattern.Type: GrantFiled: August 26, 2004Date of Patent: June 17, 2008Assignee: Seagate Technology LLCInventors: Jianxin Zhu, Lance Eugene Stover
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Publication number: 20070274005Abstract: A slider according to the present invention includes a slider body, a plurality of insulators, and conductive traces. The slider body has a first side and edges defined substantially perpendicular to the first side. The plurality of insulators are each adjacent to the first side of the slider body. The conductive traces are adjacent to each of the plurality of insulators and opposite the slider body.Type: ApplicationFiled: May 23, 2006Publication date: November 29, 2007Applicant: Seagate Technology LLCInventors: Jianxin Zhu, David A. Sluzewski, Lance E. Stover, Joel W. Hoehn, Kevin J. Schulz
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Publication number: 20070251306Abstract: A topographic profile of a structure is generated using atomic force microscopy. The structure is scanned such that an area of interest of the structure is scanned at a higher resolution than portions of the structure outside of the area of interest. An profile of the structure is then generated based on the scan. To correct skew and tilt of the profile, a first feature of the profile is aligned with a first axis of a coordinate system. The profile is then manipulated to align a second feature of the profile with a second axis of the coordinate system.Type: ApplicationFiled: April 28, 2006Publication date: November 1, 2007Applicant: Seagate Technology LLCInventors: Lin Zhou, Huiwen Liu, Dale Egbert, Jonathan Nelson, Jianxin Zhu
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Publication number: 20060114611Abstract: One aspect of the present invention relates to a slider having a slider body. The slider body includes a bearing surface defining a bearing surface plane, a leading edge, a trailing edge, first side edge, a second side edge and at least one corner. A corner feature is positioned proximate the at least one corner. The corner feature includes a first portion oriented in a first direction and a second portion oriented in a second direction that is different then the first direction. At least one of the first direction and the second direction is toward the trailing edge and is oblique to the bearing surface plane.Type: ApplicationFiled: December 1, 2004Publication date: June 1, 2006Applicant: Seagate Technology LLCInventors: Jianxin Zhu, Zine-Eddine Boutaghou, Zheng Shi
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Publication number: 20060046210Abstract: A method for creating a pattern on an exposure site of a material blank using an exposure apparatus includes providing a mask having a first mask pattern. The mask is positioned between the exposure apparatus and the material blank. The exposure site of the material blank is exposed. One or more additional exposure events are performed for patterning the exposure site of the material blank. Between each exposure event, the exposure site of the material blank is repositioned in a lateral direction with respect to the mask. Between successive exposure events involving the first mask pattern, there is a relative movement between the mask and the material blank of a distance less than or equal to a length of the first mask pattern.Type: ApplicationFiled: August 26, 2004Publication date: March 2, 2006Applicant: Seagate Technology LLCInventors: Jianxin Zhu, Lance Stover
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Patent number: 7002779Abstract: A bond pad is elevated from a slider body by a conductive post. The bond pad is disposed atop the post, which typically possesses a cross-sectional area smaller than the surface are of the bond pad. Thus, rather than having the entire surface of the bond pad in contact with the slider body, only the cross-sectional area of the conductive post is in contact therewith. Alternatively, a bond pad may be split into two electrically coupled pads: one pad used for housing a permanent bond, and a second pad used for housing a temporary bond. The pad used to house the temporary wire bond may be disposed atop a sacrificial layer. After a lapping process, the sacrificial layer may be etched away, thereby permitting the temporary pad to be removed.Type: GrantFiled: December 19, 2002Date of Patent: February 21, 2006Assignee: Seagate Technology LLCInventors: Jianxin Zhu, Lance Eugene Stover, Gordon Merle Jones
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Patent number: 6985326Abstract: In an electrostatic actuator used to control fly height between a magnetic disc and a read/write head of a disc drive, a multi-layer electrode device is used. The multi-layer electrode device includes alternating insulating layers and conductive electrode layers. By controlling the material properties of each layer of the electrode device, problems associated with leakage current, field emission discharge, tunneling current, and slow actuator response time can be controlled.Type: GrantFiled: November 17, 2003Date of Patent: January 10, 2006Assignee: Seagate Technology LLCInventors: Jianxin Zhu, Joel W. Hoehn, Dian Song
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Patent number: 6967806Abstract: An electrostatic actuator for adjusting a spacing. A first body has an electrically conducting surface, and a second body has a body surface separated by the spacing from the electrically conducting surface. A conductor layer and an actuator electrode are recessed in the second body, and an electrode face faces the electrically conducting surface across the spacing. The actuator electrode comprises a semi-insulating material with a combination of electrical resistivity and thickness which prevents shorting of the conductor layer to the electrical conducting surface through a dielectric breakdown in the spacing.Type: GrantFiled: May 19, 2003Date of Patent: November 22, 2005Assignee: Seagate Technology LLCInventors: Ram Mohan Rao, Tim William Stoebe, Deborah Susan Schnur, Zine Eddine Boutaghou, Wayne Allen Bonin, Jianxin Zhu
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Publication number: 20050105203Abstract: In an electrostatic actuator used to control fly height between a magnetic disc and a read/write head of a disc drive, a multi-layer electrode device is used. The multi-layer electrode device includes alternating insulating layers and conductive electrode layers. By controlling the material properties of each layer of the electrode device, problems associated with leakage current, field emission discharge, tunneling current, and slow actuator response time can be controlled.Type: ApplicationFiled: November 17, 2003Publication date: May 19, 2005Inventors: Jianxin Zhu, Joel Hoehn, Dian Song