Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8958178 | Reducing slider bounce in a hard disk drive | Jizhong He, John Stephen Hopkins | 2015-02-17 |
| 8618793 | High sensitivity glide sensor using frictional heating | Jizhong He, John Stephen Hopkins, Kenneth E. Johnson | 2013-12-31 |
| 8395857 | Simulating discrete track media with continuous media for head evaluation | Kezhao Zhang, Jizhong He, Jane Jie Zhang, Zhupei Shi | 2013-03-12 |
| 8174783 | Testing magnetic disk performance with a single slider simulating sliders of various disk drive systems | Zhen Jin, Jane Jie Zhang, Kezhao Zhang | 2012-05-08 |
| 8133530 | One magnetic sided media for low cost and low capacity applications | Kenneth E. Johnson, Owen Melroy | 2012-03-13 |
| 8102613 | System, method and apparatus for determining track pitch in a hard disk drive to satisfy the requirements of both off-track capacity and adjacent track erasure | Zhen Jin, Jane Jie Zhang, Kezhao Zhang | 2012-01-24 |
| 7969675 | Determination of the quality of an erase process for perpendicular magnetic recording disks | Zhupei Shi, Jane Jie Zhang, Kezhao Zhang | 2011-06-28 |
| 7946156 | Glide test heads using heating elements to form a planar detection surface | Jizhong He, Bruno Marchon, Ullal V. Nayak | 2011-05-24 |
| 7724462 | System, method and apparatus for direct head-disk clearance measurement by slider vibration and fly height calibration | Jizhong He, John Stephen Hopkins, Yansheng Luo | 2010-05-25 |
| 7692888 | Apparatus, system, and method for detection of fly height margin using controlled excitation of air bearing mode | Jizhong He, John Stephen Hopkins | 2010-04-06 |
| 7529049 | Method and system for testing of magnetic disks using F-BER | Zhupei Shi, Li Tang, Jane Jie Zhang | 2009-05-05 |
| 7271967 | System and method for determining whether defect in perpendicular recording disk drive is from thermal asperity or defect in magnetically soft underlayer | Zhupei Shi, Li Tang, Jane Jie Zhang | 2007-09-18 |
| 7173415 | System, method, and apparatus for detecting signal-to-noise ratio decay in perpendicular magnetic recording | Jizhong He, Zhupei Shi, Jane Jie Zhang | 2007-02-06 |
| 7121133 | System, method, and apparatus for glide head calibration with enhanced PZT channel for very low qualification glide heights | Norman Chu, Patricia Galindo, Hang Fai Ngo, Yu-Nan Lo, Nalin Zhou | 2006-10-17 |
| 6965229 | Method of detecting polarity reversal in a magnetoresistive sensor | Yan Liu, Li Tang | 2005-11-15 |
| 6771453 | Glide slider fly height calibration method using disk spin down and slider dynamic scan | Bradley Frederick Baumgartner, AN-CHOU CHEN, Norman Chu, Patricia Galindo, Roger Yu Lo +2 more | 2004-08-03 |
| 6662623 | Apparatus and method for glide height calibration of disk surfaces by use of dual-zone laser texture | Bradley Frederick Baumgartner, James Hammond Brannon, Jorge Colonia, Huyen D. Do, Connie H. Moy +2 more | 2003-12-16 |
| 6580266 | Thin film delamination detection for magnetic disks | Bradley Frederick Baumgartner, Yan Liu, Bob C. Robinson, Li Tang, Ka Wong | 2003-06-17 |
| 6530258 | Disk drive laser melt bump disk for accurate glide calibration and certification processing | James Hammond Brannon, Yu-Nan Lo | 2003-03-11 |
| 6526639 | Method for burnishing hard disks | Wei-Ming Lee, Yu-Nan Lo | 2003-03-04 |
| 6477008 | Magnetic recording transducer with electronic shield | Thomas Young Chang, Terence Lam, Wai Cheung Leung | 2002-11-05 |
| 6413608 | Seed layer and underlayer with high and low oxygen concentration portions for hand disk magnetic recording medium on a glass substrate | Xiaoping Bian, Mary Frances Doerner, Jinshan Li, Mohammad Mirzamaani | 2002-07-02 |
| 6407891 | Magnetic read/write head having electromagnetic field cancellation element | Thomas Young Chang, Terence Lam, Wai Cheung Leung | 2002-06-18 |
| 6357095 | Hard disk burnishing head | Wei-Ming Lee, Wai Cheung Leung | 2002-03-19 |
| 6330122 | Magnetic tester for disk surface scan | Thomas Young Chang, Terence Lam, Wai Cheung Leung | 2001-12-11 |