LexDanaLexDanabeta
Inventor

Zhigang Bai

Inventor
Milpitas, CA, US

Overview

125→
Patents
2010–2020
Patent span
Physics
Primary field (CPC G)

Patents· 125 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 transducer44%
H10WGeneric packages, interconnections, connectors or other constructional details of devices covered by class h1013%
H01LSemiconductor devices12%
Y10TTechnical subjects covered by former us classification10%
H10NElectric solid-state devices not otherwise provided for3%
H01FMagnets2%
H10PGeneric processes or apparatus for the manufacture or treatment of devices covered by class h102%
B82YSpecific uses or applications of nanostructures2%
G11CStatic stores2%
H10BElectronic memory devices2%
PatentTitleYear
10,878,841Dual writer for advanced magnetic recording202010,872,625Helical coils design and process for dual writer magnetic recording202010,862,022Spin-transfer torque MRAM with magnetically coupled assist layers and methods of operating the same202010,861,485Write heads configured to redirect current202010,839,831Dual writer designs with SOT and STT assisted recording202010,811,596Spin transfer torque MRAM with a spin torque oscillator stack and methods of making the same202010,797,227Spin-transfer torque MRAM with a negative magnetic anisotropy assist layer and methods of operating the same202010,777,219Write heads configured to redirect current202010,741,202MAMR writer with low resistance MAMR stack202010,726,892Metallic magnetic memory devices for cryogenic operation and methods of operating the same202010,699,734Magnetic recording write head with selected write gap current direction for minimization of cross-track interference202010,679,650Current-assisted magnetic recording write head with improved write gap structure202010,515,880Lead frame with bendable leads201910,290,593Method of assembling QFP type semiconductor device201910,276,208Data storage device coding out ambiguity in three-dimensional magnetic recording201910,217,700Lead frame for integrated circuit device having J-leads and Gull Wing leads201910,217,697Semiconductor device and lead frame with high density lead array201910,181,434Lead frame for integrated circuit device having J-leads and gull wing leads201910,121,495Magnetic recording write apparatus having a stepped conformal trailing shield201810,115,416Magnetic recording write apparatus having a pole having an aspect ratio greater than one and an auxiliary pole201810,037,935Lead frame with dummy leads for burr mitigation during encapsulation20189,997,177Magnetic writer having convex trailing surface pole and conformal write gap20189,890,034'Cavity type pressure sensor device'20189,779,765'Perpendicular magnetic recording writer having improved performance and wide area track erasure reliability'20179,767,831'Magnetic writer having convex trailing surface pole and conformal write gap'20179,754,611'Magnetic recording write apparatus having a stepped conformal trailing shield'20179,747,935'Heat assisted magnetic recording writer having pole coupled with the NFT'20179,721,591'Magnetic recording write apparatus having a pole having an aspect ratio greater than one and an auxiliary pole'20179,618,268'Evaporative condenser radiating module for steam exhaust of a steam turbine'20179,595,273'Shingle magnetic writer having nonconformal shields'20179,589,928'Combined QFN and QFP semiconductor package'20179,576,598'Magnetic recording write apparatus having a pole and a magnetic separation layer'20179,558,763'Magnetic recording write apparatus having a pole including an assist portion extending in the cross-track direction'20179,520,147'Side shielded magnetoresistive (MR) read head with perpendicular magnetic free layer'20169,508,372'Shingle magnetic writer having a low sidewall angle pole'20169,498,898'Cleaning mechanism for semiconductor singulation saws'20169,478,242'Magnetic recording apparatus having a recessed additional pole segment'20169,478,236'Perpendicular magnetic recording write head'20169,449,901'Lead frame with deflecting tie bar for IC package'20169,443,746'Floating mold tool for semicondcutor packaging'20169,406,625'Die edge seal employing low-K dielectric material'20169,397,066'Bond wire feed system and method therefor'20169,349,390'Ultra-short yoke length writer'20169,343,086'Magnetic recording write transducer having an improved sidewall angle profile'20169,324,637'Quad flat non-leaded semiconductor package with wettable flank'20169,286,919'Magnetic writer having a dual side gap'20169,252,114'Semiconductor device grid array package'20169,245,545'Short yoke length coils for magnetic heads in disk drives'20169,214,413'Semiconductor die package with pre-molded die'20159,214,447'Non-leaded type semiconductor package and method of assembling same'20159,214,166'Gradient write gap for perpendicular magnetic recording writer'20159,214,165'Magnetic writer having a gradient in saturation magnetization of the shields'20159,190,079'Magnetic write pole having engineered radius of curvature and chisel angle profiles'20159,190,351'Semiconductor device with webbing between leads'20159,142,233'Heat assisted magnetic recording writer having a recessed pole'20159,135,930'Method for fabricating a magnetic write pole using vacuum deposition'20159,123,358'Conformal high moment side shield seed layer for perpendicular magnetic recording writer'20159,117,464'Methods for manufacturing hybrid coils for magnetic write heads used in storage systems'20159,111,564'Magnetic recording writer having a main pole with multiple flare angles'20159,105,287'Method of forming a PMR writer device with multi-level tapered write pole'20159,082,423'Magnetic recording write transducer having an improved trailing surface profile'20159,053,715'System for providing a transducer having a split main pole'20159,042,052'Magnetic writer having a partially shunted coil'20159,042,051'Gradient write gap for perpendicular magnetic recording writer'20159,025,280'PMR writer device with multi-level tapered write pole'20158,953,285'Side shielded magnetoresistive (MR) read head with perpendicular magnetic free layer'20158,947,985'Heat assisted magnetic recording transducers having a recessed pole'20158,917,480'Magnetic recording transducers having slim shaped additional poles'20148,908,310'Adaptive shingle guard band'20148,901,721'Lead frame based semiconductor die package'20148,859,336'Method of packaging semiconductor die with cap element'20148,859,339'Mold chase'20148,844,120'Method for providing a magnetic recording transducer including an assist pole having surfaces angled with respect to the ABS'20148,842,389'Wrap-around shielded writer with highly homogeneous shield material'20148,837,081'Laminated touchdown sensor for hard disk drives'20148,797,684'Magnetic writer configured for high data rate recording'20148,797,686'Magnetic recording transducer with short effective throat height and method of fabrication'20148,792,208'Method for providing side shields having non-conformal regions for a magnetic recording transducer'20148,784,674'Method of making a PMR writer with graded side shield'20148,786,983'Magnetic writer having a low aspect ratio two layer coil'20148,760,807'Method for providing a wraparound shield for a magnetic recording transducer using a damascene process'20148,720,044'Method for manufacturing a magnetic recording transducer having side shields'20148,724,259'Conformal high moment side shield seed layer for perpendicular magnetic recording writer'20148,709,875'Power device and method of packaging same'20148,705,205'Magnetic recording head having a dual sidewall angle'20148,693,141'Systems and methods for providing stacked writer leads for magnetic transducers'20148,670,213'Methods for tunable plating seed step coverage'20148,670,212'PMR writer device with multi-level tapered write pole'20148,643,156'Lead frame for assembling semiconductor device'20148,643,153'Semiconductor device with staggered leads'20148,628,672'Process for manufacturing a perpendicular magnetic recording writer pole with nonmagnetic bevel'20148,611,046'PMR writer with graded side shield'20138,582,238'Systems and methods for providing perpendicular magnetic writers having gradient magnetic moment side shields'20138,576,517'Magnetic recording transducer having side shields between the coils and the air-bearing surface'20138,547,661'MAMR head with self-aligned write element and microwave field generator'20138,547,659'System for providing a transducer having a main coil and an additional coil separated from the main pole by a write shield'20138,542,461'Writer shields with modified shapes for reduced flux shunting'20138,536,684'Method of assembling shielded integrated circuit device'20138,537,495'Magnetic writer having a split yoke'20138,525,311'Lead frame for semiconductor device'20138,520,336'Magnetic recording head with nano scale pole tip bulge'20138,520,337'Perpendicular magnetic recording writer pole with leading and trailing bevel side wall angles at air bearing surface'20138,514,517'Systems and methods for providing hybrid coils for magnetic write heads'20138,488,272'Magnetic recording transducer having side shields'20138,405,930'Method and system for providing a transducer having dual, ABS recessed auxiliary poles on opposite sides of a main pole with non-magnetic spacer adjoining back portion of main pole and positioned between auxiliary poles'20138,373,945'Magnetic writer having a split yoke'20138,354,739'Thin semiconductor package and method for manufacturing same'20138,339,738'Method for providing a magnetic recording transducer having a hybrid moment pole'20128,320,076'Method and system for providing a magnetic recording transducer including an assist pole having surfaces angled with respect to the ABS'20128,276,258'Method for fabricating a magnetic recording transducer'20128,264,792'PMR writer device with multi-level tapered write pole'20128,259,410'Method and system for providing a magnetic head using a composite magnetic material in the recording transducer'20128,228,633'Method and system for providing a magnetic recording transducer having a hybrid moment pole'20128,209,848'Method of making a PMR writer with seamless shields'20128,184,399'Magnetic write head with thin and thick portions for balancing writability and ate'20128,179,636'Method and system for providing a perpendicular magnetic recording writer'20128,179,628'Magnetic core plasmon antenna with improved coupling efficiency'20128,166,631'Method for fabricating a magnetic recording transducer having side shields'20128,134,802'Writer and reader arrangements for shingled writing'20128,125,732'Tapered PMR write pole with straight side wall portion'20128,105,705'External field robustness of read/write head shields'20128,085,498'PMR write with flux choking area'20117,888,186'Method for assembling stackable semiconductor packages'20117,755,861'Method and system for providing a magnetic recording media'20107,688,546'Perpendicular magnetic recording head having nonmagnetic insertion layers'2010

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2010–2018Patents assigned to WESTERN DIGITAL FREMONT LLC (53)· patent assignee history
2010–2020Based in Fremont, CA, US· patent location history
2011–2017Patents assigned to BAI ZHIGANG (61)· patent assignee history
2011–2016Patents assigned to FREESCALE SEMICONDUCTOR INC (19)· patent assignee history
2011–2015Patents assigned to HEADWAY TECHNOLOGIES INC (17)· patent assignee history
2011–2016Based in Milpitas, CA, US· patent location history
2011–2019Based in Tianjin, CN· patent location history
2013–2016Patents assigned to LIU FENG (12)· patent assignee history
2017Based in Shanxi, CN· patent location history
2018Based in Irvine, CA, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
BAI ZHIGANGself612011–2017
WESTERN DIGITAL FREMONT LLC532010–2018
FREESCALE SEMICONDUCTOR INC192011–2016
HEADWAY TECHNOLOGIES INC172011–2015
LIU FENG122013–2016
Locations
LocationPatentsSpan
Milpitas, California, US492011–2016
Fremont, California, US462010–2020
Tianjin, CN272011–2019
Irvine, California, US12018
Shanxi, CN12017