Edward Hin Pong Lee - San Jose CA, US Jennifer Ai-Ming Leung - Fremont CA, US
Assignee:
Hitachi Global Storage Technologies Netherlands, B.V. - Amsterdam
International Classification:
G01R 31/26 H01L 21/66
US Classification:
438 14, 438 15, 438 17, 438 18, 257E21521
Abstract:
Test methods and components are disclosed for testing the quality of lift-off processes in wafer fabrication. A wafer is populated with one or more test components along with the functional components. These test components are fabricated with holes in an insulation layer that is deposited between conductive layers, where the holes were created by the same or similar lift-off process that is used to fabricate the functional components on the wafer. The test components may then be measured in order to determine the quality of the holes created by the lift-off process. The quality of the lift-off process used to fabricate the functional components may then be determined based on the quality of the holes in the test components.
Edward Hin Pong Lee - San Jose CA, US Jennifer Ai-Ming Leung - Fremont CA, US
Assignee:
Hitachi Global Storage Technologies Netherlands, B.V. - Amsterdam
International Classification:
H01L 21/00 H01F 30/12 G01R 1/00
US Classification:
438 17, 324 7675, 324112
Abstract:
Test methods and components are disclosed for testing resistances of helical coils formed in magnetic recording heads. Helical coils in magnetic recording heads include a bottom coil structure, a top coil structure, and connecting structures that electrically connect the top and bottom coil structures. A test component is fabricated on the wafer along with the magnetic recording heads. The test component includes a bottom coil structure connected in series, and includes a top coil structure connected in series which is electrically disconnected from the bottom coil structure. Resistances of the top and bottom coil structures are measured in the test component. A total resistance of a helical coil is also measured. The resistance of the connecting structures in the helical coil may then be determined based on the resistance of the bottom coil structure, the resistance of the top coil structure, and the total resistance of the helical coil.
Magnetic Write Head Having Helical Coil With A Fin Structure For Reduced Heat Induced Protrusion
Wen-Chien David Hsiao - San Jose CA, US Edward Hin Pong Lee - San Jose CA, US Jennifer Ai-Ming Leung - Fremont CA, US
Assignee:
Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam
International Classification:
G11B 5/17 G11B 5/40
US Classification:
36012305, 36012306, 36012532
Abstract:
A magnetic write head having a write coil configured to dissipate heat away from the write head to minimize thermal protrusion. The write coil is formed as a helical coil having upper and lower leads that are connected by electrically conductive studs formed therebetween. The first and leads extend beyond the studs to form heat conducting fins that conduct heat away from the write head where it can be dissipated into surrounding structure.
Write Head With Different Upper And Lower Yoke Lengths And Methods For Making The Same
Donald G. Allen - Morgan Hill CA, US Wen-Chien David Hsiao - San Jose CA, US Edward Hin Pong Lee - San Jose CA, US Jennifer Leung - Fremont CA, US Vladimir Nikitin - Campbell CA, US
Assignee:
Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam
International Classification:
G11B 5/127 H01L 43/12
US Classification:
36012301, 36012303, 36012504
Abstract:
According to one embodiment, a system comprises an upper yoke having a first length defined between a pole tip thereof and a back gap thereof. In addition, the system includes a lower yoke having a second length defined between a pole tip thereof and a back gap thereof, the second length being greater than the first length. Also, the system includes coil turns in the upper and lower yokes. Additional systems and methods are also presented.
Magnetic Write Head Fabrication With Integrated Electrical Lapping Guides
Methods of fabricating magnetic write heads and electrical lapping guides (ELG's) using a split gap deposition process is described. A removal process is performed on a magnetic material to define a main write pole and to define a corresponding ELG for the main write pole. A first non-magnetic gap layer is deposited. A mask and liftoff process is performed to deposit an electrically conductive material on the first gap layer disposed along a front edge of the ELG. A second non-magnetic gap layer is then deposited and a shield is fabricated for the write pole.
Perpendicular Magnetic Write Head Having A Laminated Trailing Return Pole
A perpendicular magnetic write head having a laminated trailing return pole structure that reduces magnetic eddy currents in the return pole for improved write head efficiency. The trailing magnetic return pole includes multiple magnetic layers. Each magnetic layer is separated from an adjacent magnetic layer of the return pole by a non-magnetic layer. The non-magnetic layer terminates at a region that is removed from the air bearing surface in order to allow contact between the magnetic layers at the ABS, thereby preventing stray magnetic fields from emitting from the magnetic layers of the write pole.
Perpendicular Magnetic Recording Head With Photoresist Dam Between Write Coil And Air Bearing Surface
Donald G. Allen - Morgan Hill CA, US Edward Hin Pong Lee - San Jose CA, US Jennifer Ai-Ming Leung - Fremont CA, US
Assignee:
Hitachi Global Storage Technologies Netherlands B.V. - Amsterdam
International Classification:
G11B 5/17 G11B 5/31 G11B 5/39
US Classification:
36012306, 36012312
Abstract:
A magnetic recording head for use in perpendicular magnetic recording having a design that allows the write coil to be manufactured by a damascene process for increased coil pitch and reduced coil resistance. The magnetic write head includes a photoresist dam structure that allows a hard baked photoresist to be formed that does not extend to the air bearing surface (ABS). Since the photoresist dam prevents the hard baked photoresist from reaching the ABS, the damascene process, in which the hard baked photoresist remains in the finished write head, can be used to produce the write head. The use of such a damascene process advantageously allows the space between the coil turns to be reduced, which maximizes the number of turns that can be used and also maximizes the number width to which the coil turns can be constructed, thereby minimizing the electrical resistance of the write coil.
Name / Title
Company / Classification
Phones & Addresses
Jennifer Leung CFO
Advance Recruitment Advg Advertising Agencies
652 Bair Island Rd Ste 301, Redwood City, CA 94063
Jennifer Leung Owner
Lavande Nail Spa Beauty Shops
113 Carl St, San Francisco, CA 94117 Website: lavandenailspa.com
Jennifer Leung Attorney
Dla Piper Legal Services
153 Townsend Street, San Francisco, CA 94107
Jennifer Leung Manager
Lavande Nail Spa Beauty Shops
355 Santana Row # 1020, San Jose, CA 95128 Website: lavandenailspa.com
Jennifer Leung President
CHINESE HERBS CORPORATION
918 Clement St, San Francisco, CA 94118
Jennifer Leung CFO
Advance Recruitment Advg Advertising Agencies
652 Bair Is Rd STE 301, Redwood City, CA 94063 6502988100
Jennifer Leung Manager
Lavande Nail Spa
355 Santana Row #1020, San Jose, CA 95128 4089831222, 4158400418
Dr. Leung graduated from the University of Southern California Keck School of Medicine in 1991. She works in San Diego, CA and specializes in Family Medicine.
2008 to 2000 Shift Supervisor, Hayward and Union CityThe Elephant Bar Hayward, CA 2011 to 2012 HostessFollowed Cleanliness and Safety Standards Hayward, CA 2006 to 2008 BaristaJoanne's Fabrics and Crafts Santa Rosa, CA 2005 to 2006 Team member
Education:
Chabot Community College May 2011 Associate of Arts in Liberal Arts
Leonidou & Rosin 777 Cuesta Drive, Suite 200, Mountain View, CA 94040
Phone:
6506912888 (Phone), 6506912889 (Fax)
Specialties:
Construction Law
ISLN:
920923472
Admitted:
2008, California
University:
University of California, San Diego, B.A., 2005
Law School:
Santa Clara University, J.D., 2008
Links:
Site
Biography:
Ms. Leung handles all aspects of construction litigation matters, including pre-construction issues, involving contract review and bid protests. Ms. Leung also deals with a variety of construction cla...
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Jennifer Leung
Jennifer was baptized at Pacific Crossroads Church on June 9, 2013.