LexDanaLexDanabeta
Inventor

Wen-Chien David Hsiao

Inventor
San Jose, CA, US

Overview

96→
Patents
1999–2021
Patent span
Physics
Primary field (CPC G)

Patents· 96 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G11Bprimary
G11BInformation storage based on relative movement between record carrier and transducer66%
Y10TTechnical subjects covered by former us classification20%
B82YSpecific uses or applications of nanostructures8%
C25DProcesses for the electrolytic or electrophoretic production of coatings1%
G01RMeasuring electric variables1%
H01FMagnets1%
H01LSemiconductor devices1%
H10DInorganic electric semiconductor devices1%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h101%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h101%
PatentTitleYear
11,011,623Method for increasing germanium concentration of FIN and resulting semiconductor device20219,449,635'Method for forming a magnetic head for perpendicular magnetic recording'20169,412,398'Shield with uniform magnetic properties for a perpendicular magnetic recording head'20169,183,853'Magnetic write head having a stacked coil architecture for high data rate performance'20159,129,619'Partial main pole lamination for pole erasure improvement'20159,099,110'Real time writer shields magnetization optimization for FTI improvement'20158,947,828'Magnetic head having a double bump wrap around shield'20158,947,827'Stitched pole having a tapered tip'20158,929,028'Perpendicular magnetic write head having a laminated trailing return pole'20158,837,084'Perpendicular magnetic write head having a hull shaped stitched pole'20148,780,499'Magnetic write head having a residual shield seed layer for reducing overwriting'20148,730,617'Tapered leading and side shields for use in a perpendicular magnetic recording head'20148,634,161'Systems having writer with deeper wrap around shield and methods for making the same'20148,634,167'Magnetic head with self compensating dual thermal fly height control'20148,553,361'Perpendicular write head having a trailing shield with a short gap, short throat and high apex angle for improved linear density recording'20138,551,347'Methods for creating a stepped perpendicular magnetic pole via milling and/or metal liftoff'20138,547,660'Magnetic write head manufactured by an enhanced damascene process producing a tapered write pole with a non-magnetic spacer and non-magnetic bump'20138,503,131'Perpendicular magnetic write head having a novel shield structure'20138,474,127'Method for enhancing thermal stability, improving biasing and reducing damage from electrostatic discharge in self-pinned abutted junction heads'20138,422,168'Magnetic write head having a self-aligned side wrap-around shield with multi-angle slanted bump'20138,349,197'Method for manufacturing a perpendicular magnetic write head having a tapered write pole and non-magnetic bump structure'20138,331,058'Method and apparatus for providing a write head with an improved pole tip to improve overwrite and/or adjacent track interference'20128,320,078'Perpendicular magnetic recording write head with antiparallel-coupled laminated main pole having a tapered trailing edge'20128,284,525'Current perpendicular to plane magnetoresistance read head design using a current confinement structure proximal to an air bearing surface'20128,259,412'Thermal fly height control magnetic recording head having a novel heating element geometry'20128,233,234'Stepped main pole for perpendicular write heads in hard disk drives and method of making same'20128,223,462'Magnetoresistive sensor design for signal noise pickup reduction for use with deep gap electrostatic discharge shunt'20128,218,263'Write head with different upper and lower yoke lengths and methods for making the same'20128,201,320'Method for manufacturing a magnetic write head having a wrap around shield that is magnetically coupled with a leading magnetic shield'20128,186,040'Methods for creating slanted perpendicular magnetic pole via metal liftoff'20128,179,634'Perpendicular magnetic recording writer main pole having imbedded non-magnetic core and de-coupled pole tip'20128,139,320'Write head having independent side shield and trailing shield throat height'20128,120,874'Perpendicular write head having a modified wrap-around shield to improve overwrite, adjacent track interference and magnetic core width dependence on skew angle'20128,110,085'Assisted deposition, narrow trench damascene process for manufacturing a write pole of a magnetic write head'20128,111,479'Perpendicular magnetic recording head having a notched trailing shield'20128,108,985'Method for manufacturing a perpendicular magnetic write head'20128,098,463'Current perpendicular to plane magnetoresistance read head design using a current confinement structure proximal to an air bearing surface'20128,089,725'Magnetic head having a stepped or segmented wrap around shield and methods of formation thereof'20128,085,497'Method of multi-angled bump processing for magnetic pole fabrication and systems thereof'20118,068,311'Perpendicular magnetic write head having a novel trailing return pole for reduced wide-area-track-erasure'20118,066,893'Method for creating a magnetic write pole having a stepped perpendicular pole via CMP-assisted liftoff'20118,031,432'Magnetic write head having helical coil with a fin structure for reduced heat induced protrusion'20118,018,679'Perpendicular magnetic recording write head with slanted magnetic write pole'20117,990,652'Perpendicular magnetic write head with stepped write pole for reduced MCW dependency on skew angle'20117,990,651'Method of manufacturing a perpendicular magnetic write head with stepped trailing magnetic shield with electrical lapping guide control'20117,974,047'Current perpendicular to plane differential magnetoresistance read head design using a current confinement structure proximal to an air bearing surface'20117,889,458'Write head with self-cross biased pole for high speed magnetic recording'20117,877,859'Shield fabrication of magnetic write heads'20117,881,019'Two step corner recess for secondary stray field reduction in a perpendicular magnetic recording head'20117,848,054'Perpendicular magnetic write head having a corner notched conformal, wrap-around, trailing magnetic shield for reduced adjacent track interference'20107,835,111'Magnetic write head with upper return pole optimization for reduced trailing shield protrusion'20107,821,736'Shaped trailing shield of a perpendicular recording write element'20107,788,796'Method FPR manufacturing a magnetic write head'20107,770,285'Method of forming a magnetic read/write head'20107,768,744'Perpendicular magnetic recording write head with coplanar main pole and return poles and magnetic recording system'20107,748,103'Method of manufacturing a perpendicular magnetic recording write head with notched trailing shield'20107,675,709'Magnetic write head having a stair notched, steep shouldered pole and a write gap bump'20107,639,453'Perpendicular magnetic write head with shunt structure to prevent read sensor interference'20097,633,711'Magnetic write head with helical coil structure using multiple materials'20097,593,183'Magnetic write head design for reducing temperature induced protrusion'20097,576,951'Perpendicular magnetic write head having a magnetic write pole with a concave trailing edge'20097,549,215'Method for manufacturing a magnetic head for perpendicular magnetic data recording'20097,551,397'Magnetic write head having a first magnetic pole with a self aligned stepped notch'20097,538,977'Method and apparatus for providing diamagnetic flux focusing in a storage device'20097,538,976'Trailing shield design for reducing wide area track erasure (water) in a perpendicular recording system'20097,536,774'Method and apparatus for integrating a stair notch and a gap bump at a pole tip in a write head'20097,525,760'Laminated write gap to improve writer performance'20097,508,628'Winged pole and shield structure for reducing stray field in a perpendicular write head'20097,506,431'Method of manufacturing a perpendicular magnetic write head having a wrap-around trailing shield and a concave trailing edge main pole'20097,505,226'Method and apparatus for providing a pole tip structure having a shape for preventing over saturation of the pole tip structure'20097,500,302'Process for fabricating a magnetic recording head with a laminated write gap'20097,339,763'Disk drive thin-film inductive write head with pole tip structure having reduced susceptibility to corrosion'20087,227,711'System, method, and apparatus for in-situ stray magnetic field measurement'20077,212,380'Magnetic write head with recessed overcoat'20077,209,329'Heat sink and high thermal stability structure for CPP sensor'20077,190,552'Magnetic head having a damascene-fabricated write coil structure with coil layers extending between the poles for reduced electrical resistance'20077,154,696'Tunable fly height using magnetomechanical effect in a magnetic head'20067,133,241'Method and apparatus for optimizing record quality with varying track and linear density by allowing overlapping data tracks'20067,099,123'Self-pinned abutted junction heads having an arrangement of a second hard bias layer and a free layer for providing a net net longitudinal bias on the free layer'20067,092,220'Apparatus for enhancing thermal stability, improving biasing and reducing damage from electrostatic discharge in self-pinned abutted junction heads having a first self-pinned layer extending under the hard bias layers'20067,092,206'Magnetic head with magnetic layers of differing widths and third pole with reduced thickness'20067,088,550'Magnetic hard disk recording head with self-compensating thermal expansion'20067,085,100'Magnetic head having a bilayer pole tip'20067,083,738'Method for creating inductive write head with steep shoulder at notch'20067,079,353'Magnetic head having a write coil structure with a reduced electrical resistance for reducing thermal protrusion'20067,072,154'Method and apparatus for providing a self-pinned bias layer that extends beyond the ends of the free layer'20067,050,277'Apparatus having a self-pinned abutted junction magnetic read sensor with hard bias layers formed over ends of a self-pinned layer and extending under a hard bias layer'20067,035,047'Magnetic recording heads having thin thermally conductive undercoating'20067,023,660'Localized pole tip heating device for magnetic head for hard disk drive'20066,842,306'Magnetic head having highly thermally conductive insulator materials containing cobalt-oxide'20056,826,014'Write head having first pole piece with frequency dependent variable effective throat height'20046,570,743'READ HEAD WITH HIGH AND LOW RESISTANCE LEAD LAYERS WHEREIN THE HIGH RESISTANCE LEAD LAYERS ARE CONNECTED TO A READ SENSOR AND EXTEND PERPENDICULAR FROM AN AIR BEARING SURFACE (ABS) OF THE READ HEAD BEYOND A BACK RECESSED EDGE OF THE SENSOR WHERE THE HIGH RESISTANCE LEAD LAYERS ARE CONNECTED TO THE LOW RESISTANCE LAYERS'20036,430,011'Read head with improved lead layers at an air bearing surface'20026,176,005'Method of making read head with improved lead layers'20016,085,406'Method of making a read head with improved lead layers at an air bearing surface'20006,001,235'Rotary plater with radially distributed plating solution'1999

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1999–2016Based in San Jose, CA, US· patent location history
2005–2010Patents assigned to HITACHI GLOBAL STORAGE TECH (39)· patent assignee history
2010–2013Patents assigned to HITACHI GLOBAL STORAGE TECH NL (29)· patent assignee history
2011–2013Patents assigned to HSIAO WEN-CHIEN DAVID (19)· patent assignee history
2011–2013Patents assigned to NIKITIN VLADIMIR (10)· patent assignee history
2012–2016Patents assigned to HGST Netherlands BV (20)· patent assignee history
2021Based in Tainan, TW· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HITACHI GLOBAL STORAGE TECH392005–2010
HITACHI GLOBAL STORAGE TECH NL292010–2013
HGST Netherlands BV202012–2016
HSIAO WEN-CHIEN DAVIDself192011–2013
NIKITIN VLADIMIR102011–2013
Locations
LocationPatentsSpan
San Jose, California, US951999–2016
Tainan, TW12021