Patents by Inventor Hai Sun
Hai Sun 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: 8649123Abstract: A method for providing a perpendicular magnetic recording (PMR) head is disclosed. The method comprises: providing an insulating layer; covering the insulating layer with a hard mask material; forming a pre-defined shape in the hard mask material; forming a pole trench and a yoke area in the insulating layer by a first reactive ion etching (RIE) process in which the yoke area includes a loading prevention pattern; performing a wet etching process to remove the hard mask material from the pole trench and the yoke area; performing a second RIE process to remove the loading prevention pattern of the yoke area, wherein the pole trench and the remainder of the yoke area are not removed and remain having similar side wall angles; and providing a PMR pole in which at least a portion of the PMR pole resides in the pole trench.Type: GrantFiled: November 26, 2008Date of Patent: February 11, 2014Assignee: Western Digital (Fremont), LLCInventors: Jinqiu Zhang, Hai Sun, Hongping Yuan, Tsung Yuan Chen
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Patent number: 8563146Abstract: A method for fabricating a magnetic transducer having an air-bearing surface (ABS). An underlayer having a first and second regions and a bevel connecting these regions is provided. The first region is thicker and closer to the ABS than the second region. An intermediate layer conformal with the underlayer is provided. A hard mask layer having a top surface perpendicular to the ABS is formed on the intermediate layer. Part of the hard mask and intermediate layers are removed to provide a trench. The trench has a bottom surface and sidewalls having a first angle between the bottom surface and the intermediate layer and a second angle corresponding to the hard mask layer. A pole is provided in the trench. The pole has a pole tip, a yoke distal, and a bottom bevel. At least the yoke includes sidewalls having sidewall angles corresponding to the first and second angles.Type: GrantFiled: June 27, 2011Date of Patent: October 22, 2013Assignee: Western Digital (Fremont), LLCInventors: Jinqiu Zhang, Ying Hong, Hai Sun, Hongping Yuan, Guanghong Luo, Xiaoyu Yang, Hongmei Han, Lingyun Miao
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Patent number: 8475190Abstract: A connection unit for fluorescent tubes includes a base having an extension which has an opening and an engaging portion is defined along an inner periphery of the opening, a cover is removably mounted to the base and a rotatable member is located in the cover, the cover has a terminal entrance defined in the base portion thereof so that terminals of a fluorescent tube are inserted into the terminal entrance, a shank extends from the base portion and a disk is connected to a distal end of the shank, the disk is engaged with the engaging portion of the base, the extension of the base and the cover position the disk so that the rotatable member is secured when being rotated.Type: GrantFiled: May 27, 2011Date of Patent: July 2, 2013Assignee: Chuan He Co., Ltd.Inventor: Ming-Hai Sun
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Patent number: 8475189Abstract: A connection unit for fluorescent tubes includes a base connected to each of two ends of a light unit and the base has an extension, two conductive plates are connected to two reception areas of the extension, a cover is removably connected to the base and has a room and a recessed area is defined in the top of the cover, a rotatable member is removably connected to the recessed area and has a face board which has a reception hole communicating with the room, a shank is connected to the periphery of the reception hole and the rotatable member is rotatable about an axis of the recessed area, the base and the conductive plates are pulled out from the recessed area and the room respectively.Type: GrantFiled: May 27, 2011Date of Patent: July 2, 2013Assignee: Chuan He Co., Ltd.Inventor: Ming-Hai Sun
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Publication number: 20130157492Abstract: A rotating lamp tube socket structure includes a seat body, a cover and a rotating element, and the rotating element is pivotally turned with respect to a cover to an installing position or a conducting position, such that when the rotating element is pivotally turned to the installing position, an elastic element is compressed to retract in a direction towards the cover, and when the rotating element is pivotally turned to the conducting position, an elastic resilience of the elastic element props the rotating element to be protruded towards the outside.Type: ApplicationFiled: July 8, 2012Publication date: June 20, 2013Inventor: Ming-Hai Sun
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Patent number: 8413317Abstract: A method and system for fabricating a microelectric device are described. A write pole of an energy assisted magnetic recording head or a capacitor might be fabricated. The method includes depositing a resist film and curing the resist film at a temperature of at least 180 degrees centigrade. A cured resist film capable of supporting a line having an aspect ratio of at least ten is thus provided. A portion of the cured resist film is removed. A remaining portion of the resist film forms the line. An insulating or nonmagnetic layer is deposited after formation of the line. The line is removed to provide a trench in the insulating or nonmagnetic layer. The trench has a height and a width. The height divided by the width corresponds to the aspect ratio. At least part of the structure is provided in the trench.Type: GrantFiled: November 12, 2010Date of Patent: April 9, 2013Assignee: Western Digital (Fremont), LLCInventors: Dujiang Wan, Hai Sun, Ge Yi, Wei Gao, Hong Zhang, Guanghong Luo, Yunjun Tang, Tiffany Yun Wen Jiang, Zhigang Zhou, Wencheng Su
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Patent number: 8394280Abstract: Methods of patterning a material are disclosed. A first resist pattern is formed on a field. A protective layer is formed over the first resist pattern and at least a portion of the field. A second resist pattern is formed over a portion of the protective layer. A portion of a material to be patterned deposited adjacent to the first and second resist patterns is removed.Type: GrantFiled: November 6, 2009Date of Patent: March 12, 2013Assignee: Western Digital (Fremont), LLCInventors: Dujiang Wan, Hai Sun, Hongping Yuan, Ling Wang, Xianzhong Zeng
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Publication number: 20130033880Abstract: A lamp tube socket structure includes a base, an elastic element, an abutting element, a cover and a metal clip, and the base has an actuating portion, a support pillar extended transversally from the actuating portion and comprised of two wings, and an elastic element is contained in the support pillar, and the abutting element is passed and installed to the two wings of the support pillar and pushed by the elastic element, and the cover has a covering portion, an embedding hole formed on the covering portion, and the cover is combined with the base, and a metal clip containing portion is formed between the covering portion and the actuating portion.Type: ApplicationFiled: July 8, 2012Publication date: February 7, 2013Inventor: Ming-Hai SUN
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Patent number: 8334093Abstract: A method and system for providing a PMR pole in a magnetic recording transducer including an intermediate layer are disclosed. The method and system include providing a mask on the intermediate layer. The mask includes a line having at least one side. A hard mask layer is provided on the mask. At least a portion of the hard mask layer resides on the side(s) of the line. At least part of the hard mask layer on the side(s) of the line is removed. Thus, at least a portion of the line is exposed. The line is then removed, providing an aperture in the hard mask corresponding to the line. The method also includes forming a trench in the intermediate layer under the aperture. The trench top is wider than its bottom. The method further includes providing a PMR pole, at least a portion of which resides in the trench.Type: GrantFiled: October 31, 2008Date of Patent: December 18, 2012Assignee: Western Digital (Fremont), LLCInventors: Jinqiu Zhang, Hai Sun, Hongping Yuan, Tsung Yuan Chen, Guanxiong Li
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Patent number: 8322023Abstract: A method for fabricating a magnetic transducer is described. The magnetic transducer includes a pole having a pole tip and a flared region. The method Includes providing a first mask layer on the pole and providing a second mask layer on the first mask layer. The first mask layer is soluble in a predetermined solution and has a first thickness. The second mask layer has a second thickness greater than the first thickness. The method also includes forming a mask from the first mask layer and the second mask layer. The step of forming the mask layer includes using the predetermined solution. The mask has a pattern that exposes a portion of the pole tip and covers a portion of the flared region. The method also includes providing a wrap-around shield on at least the pole tip.Type: GrantFiled: November 10, 2009Date of Patent: December 4, 2012Assignee: Western Digital (Fremont), LLCInventors: Xianzhong Zeng, Yunhe Huang, Ling Wang, Hai Sun
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Publication number: 20120302080Abstract: A connection unit for fluorescent tubes includes a base having an extension which has an opening and an engaging portion is defined along an inner periphery of the opening. A cover is removably mounted to the base and a rotatable member is located in the cover. The cover has a terminal entrance defined in the base portion thereof so that terminals of a fluorescent tube are inserted into the terminal entrance. A shank extends from the base portion and a disk is connected to a distal end of the shank. The disk is engaged with the engaging portion of the base. The extension of the base and the cover position the disk so that the rotatable member is secured when being rotated.Type: ApplicationFiled: May 27, 2011Publication date: November 29, 2012Inventor: Ming-Hai Sun
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Publication number: 20120302079Abstract: A connection unit for fluorescent tubes includes a base connected to each of two ends of a light unit and the base has an extension. Two conductive plates are connected to two reception areas of the extension. A cover is removably connected to the base and has a room and a recessed area is defined in the top of the cover. A rotatable member is removably connected to the recessed area and has a face board which has a reception hole communicating with the room. A shank is connected to the periphery of the reception hole and the rotatable member is rotatable about an axis of the recessed area. The base and the conductive plates are pulled out from the recessed area and the room respectively.Type: ApplicationFiled: May 27, 2011Publication date: November 29, 2012Inventor: Ming-Hai Sun
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Patent number: 8284517Abstract: A perpendicular magnetic recording (PMR) head comprises a PMR pole having at least one side, a bottom, and a top wider than the bottom, a first portion of the at least one side being substantially vertical, a second portion of the at least one side being nonvertical, the top portion having a width not greater than one hundred fifty nanometers. The PMR head further comprises a nonmagnetic layer surrounding the bottom and the at least one side of the PMR pole, an intermediate layer substantially surrounding at least the second portion of the at least one side of the PMR pole, and a planarization stop layer adjacent to the first portion of the at least one side of the PMR pole.Type: GrantFiled: February 14, 2012Date of Patent: October 9, 2012Assignee: Western Digital (Fremont), LLCInventors: Hai Sun, Jinqiu Zhang, Hongping Yuan, Donghong Li, Liubo Hong, Yong Shen
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Publication number: 20120237878Abstract: A method for fabricating a magnetic transducer having a nonmagnetic intermediate layer is described. A pole is provided on the intermediate layer. The pole has sides, a bottom, a top wider than the bottom and a leading bevel proximate to an ABS location. A side gap is provided adjacent to at least the sides of the pole. A bottom antireflective coating (BARC) layer is provided on the intermediate layer. The BARC layer is removable using a wet etchant and is adjacent to at least a portion of the side gap. A mask layer is provided on the BARC layer. A pattern is photolithographically transferred into the mask layer, forming a shield mask. Part of the BARC layer is exposed to the wet etchant such that the sides of the pole and the side gap are free of the BARC layer. At least a magnetic side shield is provided.Type: ApplicationFiled: March 18, 2011Publication date: September 20, 2012Applicant: WESTERN DIGITAL (FREMONT), LLCInventors: XIANZHONG ZENG, DUJIANG WAN, HONGPING YUAN, LING WANG, MIAO WANG, HAI SUN
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Patent number: 8169473Abstract: A method and system for exposing a plurality of fields on a substrate. The substrate has a center and an edge. The fields include a plurality of rows. The method and system include determining an exposure sequence for the plurality of fields. Each of the plurality of fields has a distance from the center and a placement in the exposure sequence. The placement of a field in the exposure sequence is based on the distance and excludes placing each of the plurality of fields in a row of the plurality of rows next to an adjacent field in the row in combination with placing each of the plurality of rows next to an adjacent row. The method and system also include exposing the plurality of fields in the exposure sequence in order of the placement.Type: GrantFiled: March 27, 2008Date of Patent: May 1, 2012Assignee: Western Digital (Fremont), LLCInventors: Winnie Yu, Hai Sun, Hongping Yuan, Xianzhong Zeng
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Patent number: 8163185Abstract: A method of lifting off photoresist beneath an overlayer includes providing a structure including photoresist and depositing an overlayer impenetrable to a liftoff solution over the photoresist and a field region around the structure. The method also includes forming a mask over the structure and ion milling to remove the overlayer in the field region not covered by the mask. The method then includes lifting off the photoresist using the liftoff solution.Type: GrantFiled: March 31, 2008Date of Patent: April 24, 2012Assignee: Western Digital (Fremont), LLCInventors: Hai Sun, Liubo Hong, Rowena Schmidt, Lijie Zhao, Winnie Yu, Hongping Yuan
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Patent number: 8136224Abstract: A method and system for providing a PMR pole in a magnetic recording transducer including an intermediate layer are disclosed. The method and system include providing a mask including a line on the intermediate layer. The line has at least one side, a top, and a bottom. The side(s) have an undercut such that the top of the line is wider than the bottom. The method further include providing a hard mask on the PMR transducer. The hard mask includes an aperture corresponding to the line. Thus, an aperture in the hard mask corresponding to the line is provided. The method and system also include forming a trench in the intermediate layer under the aperture. The trench has a bottom and a top wider than the bottom. The method further includes providing a PMR pole, at least a portion of which resides in the trench.Type: GrantFiled: May 15, 2008Date of Patent: March 20, 2012Assignee: Western Digital (Fremont), LLCInventors: Hai Sun, Jinqiu Zhang, Hongping Yuan, Donghong Li, Liubo Hong, Yong Shen
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Patent number: 8072705Abstract: A method and system for providing a magnetic writer are described. The method and system include providing a bottom antireflective coating (BARC) on a portion of the magnetic writer. The BARC has a low reflectivity. The method and system also include providing a barrier layer on at least a portion of the BAR and providing a mask on at least a portion of the barrier layer. The barrier layer isolates the BARC from the mask.Type: GrantFiled: May 11, 2007Date of Patent: December 6, 2011Assignee: Western Digital (Fremont), LLCInventors: Yizhong Wang, Hong Zhang, Hai Sun, Hongping Yuan, Winnie Yu
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Publication number: 20110086240Abstract: Various embodiments of the subject disclosure provide a double patterning process that uses two patterning steps to produce a write structure having a nose shape with sharp corners. In one embodiment, a method for forming a write structure on a multi-layer structure comprising a substrate and an insulator layer on the substrate is provided. The method comprises forming a hard mask layer over the insulator layer, performing a first patterning process to form a pole and yoke opening in the hard mask layer, performing a second patterning process to remove rounded corners of the pole and yoke opening in the hard mask layer, removing a portion of the insulator layer corresponding to the pole and yoke opening in the hard mask layer to form a trench in the insulator layer, and filling the trench with a magnetic material.Type: ApplicationFiled: October 14, 2009Publication date: April 14, 2011Applicant: Western Digital (Fremont), LLCInventors: Xiaohai XIANG, Yun-Fei LI, Jinqiu ZHANG, Hongping YUAN, Xianzhong ZENG, Hai SUN
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Patent number: 7910267Abstract: An optical mask for providing a pattern for portion of an electronic device, such as a magnetic recording transducer, is disclosed. The optical mask includes a device feature and at least one detached correction feature. The device feature includes a corner corresponding to a device corner of the pattern. The device corner has an angle of greater than zero degrees and less than one hundred eighty degrees. The at least one detached correction feature resides in proximity to but is physically separated from the corner. Each of the at least one detached correction feature is sub-resolution.Type: GrantFiled: December 12, 2008Date of Patent: March 22, 2011Assignee: Western Digital (Fremont), LLCInventors: Xianzhong Zeng, Hai Sun, Hongping Yuan, Dujiang Wan, Ling Wang