Patents by Inventor Bing-Shiuan Chang
Bing-Shiuan 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: 9607646Abstract: Systems and methods are illustrated for manufacturing hard disks with double lubrication layers that allow minimization of a HDD head DFH touchdown point while maintaining good tribology performance for HDD reliability. An exemplary hard disk includes a magnetic recording layer, a carbon overcoat, and a double lubrication layer: a bonded lubrication layer and a mobile lubrication layer. The bonded lubrication layer includes a high conformity and high density first lubricant. The mobile layer include a high lubricity lubricant that promotes HDI reliability.Type: GrantFiled: March 4, 2014Date of Patent: March 28, 2017Assignee: WD MEDIA, LLCInventors: Yasuo Sakane, Kim Thuy Thi Lai, Shaun H. Chen, Bing-Shiuan Chang
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Patent number: 9296022Abstract: A sonication cleaning system is provided. The sonication cleaning system includes a cleaning tank configured to contain a liquid and a flow control system configured to cause a gradient cross flow of the liquid through the cleaning tank. The system further includes a sonication generator configured to agitate the liquid in the cleaning tank and a controller configured to vary a power applied to the sonication generator to agitate the liquid in the cleaning tank based on an oscillation position of a workpiece within the cleaning tank.Type: GrantFiled: October 18, 2013Date of Patent: March 29, 2016Assignee: WD Media, LLCInventors: Chaoyuan C. Chen, Bing-Shiuan Chang
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Publication number: 20150036240Abstract: Systems and methods are illustrated for manufacturing hard disks with double lubrication layers that allow minimization of a HDD head DFH touchdown point while maintaining good tribology performance for HDD reliability. An exemplary hard disk includes a magnetic recording layer, a carbon overcoat, and a double lubrication layer: a bonded lubrication layer and a mobile lubrication layer. The bonded lubrication layer includes a high conformity and high density first lubricant. The mobile layer include a high lubricity lubricant that promotes HDI reliability.Type: ApplicationFiled: March 4, 2014Publication date: February 5, 2015Applicant: WD Media, LLCInventors: YASUO SAKANE, KIM THUY THI LAI, SHAUN H. CHEN, BING-SHIUAN CHANG
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Patent number: 8596287Abstract: A cleaning tank apparatus and methods for cleaning workpieces are described. The cleaning tank may include an outlet plate having a top edge and a bottom edge, with the outlet plate having a plurality of rows of outlet openings. The plurality of rows of outlet openings including a first row of outlet openings being closest to the top edge of the outlet plate, and a second row of outlet openings below the first row of outlet openings, wherein at least one of the outlet openings of the first row is larger than the outlet openings of the second row.Type: GrantFiled: March 1, 2010Date of Patent: December 3, 2013Assignee: WD Media, LLCInventors: Chaoyuan C. Chen, Bing-Shiuan Chang
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Patent number: 8584687Abstract: A sonication cleaning system is provided. The sonication cleaning system includes a cleaning tank configured to contain a liquid and a flow control system configured to cause a gradient cross flow of the liquid through the cleaning tank. The system further includes a sonication generator configured to agitate the liquid in the cleaning tank and a controller configured to vary a power applied to the sonication generator to agitate the liquid in the cleaning tank based on an oscillation position of a workpiece within the cleaning tank.Type: GrantFiled: June 25, 2010Date of Patent: November 19, 2013Assignee: WD Media, LLCInventors: Chaoyuan C. Chen, Bing-Shiuan Chang
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Patent number: 8404056Abstract: A disk is placed into a sonication cleaning tank containing a liquid. A first flow rate and a first sonication power are applied to the liquid to clean the disk. An opacity count is generated indicative of contaminants and/or bubbles in the liquid. Based at least in part on the opacity count, a second flow rate and a second sonication power are then applied to the liquid.Type: GrantFiled: May 27, 2009Date of Patent: March 26, 2013Assignee: WD Media, LLCInventors: Chaoyuan Chen, Bing-Shiuan Chang, Rhownica A. Lund, Atul K. Trivedi, John Cho, Shaun H. Chen
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Patent number: 7998912Abstract: A composite lubricant for recording disk media, a recording disk media including a layer of the composite lubricant, and method of manufacturing the same are described. The composite lubricant may include a non-phosphazene component and a phosphazene component where the non-phosphazene component is a difunctional perfluoropolyether compound terminated with first and second polar end groups, the first polar end group comprising a first number of hydroxyls and the second polar end includes a second number of hydroxyls, greater than the first number of hydroxyls. The phosphazene component may be a difunctional perfluoropolyether compound terminated with a phosphazene functional group and with a third polar end group, the third polar end group comprising a third number of hydroxyls equal to the second number of hydroxyls.Type: GrantFiled: September 14, 2009Date of Patent: August 16, 2011Assignee: WD Media, Inc.Inventors: Shaun H. Chen, Yasuo Sakane, Henry S. Nishihira, Chi Kong Kwok, The V. Tran, Bing-Shiuan Chang
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Publication number: 20110064970Abstract: A composite lubricant for recording disk media, a recording disk media including a layer of the composite lubricant, and method of manufacturing the same are described. The composite lubricant may include a non-phosphazene component and a phosphazene component where the non-phosphazene component is a difunctional perfluoropolyether compound terminated with first and second polar end groups, the first polar end group comprising a first number of hydroxyls and the second polar end includes a second number of hydroxyls, greater than the first number of hydroxyls. The phosphazene component may be a difunctional perfluoropolyether compound terminated with a phosphazene functional group and with a third polar end group, the third polar end group comprising a third number of hydroxyls equal to the second number of hydroxyls.Type: ApplicationFiled: September 14, 2009Publication date: March 17, 2011Applicant: WD MEDIA, INC.Inventors: Shaun H. Chen, Yasuo Sakane, Henry S. Nishihira, Chi Kong Kwok, The V. Tran, Bing-Shiuan Chang