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Inventor

Yunfei Ding

Inventor
Fremont, CA, US

Overview

20→
Patents
2007–2020
Patent span
Physics
Primary field (CPC G)

Patents· 20 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 transducer36%
G11CStatic stores21%
H01FMagnets13%
B82YSpecific uses or applications of nanostructures8%
H10NElectric solid-state devices not otherwise provided for8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
H01LSemiconductor devices5%
G01RMeasuring electric variables3%
PatentTitleYear
10,825,474Data storage device reverse biasing head element to counter electro-migration202010,741,202MAMR writer with low resistance MAMR stack202010,643,642Apparatus and method for writing to magnetic media using an AC bias current to enhance the write field202010,629,229High-bandwidth STO bias architecture with integrated slider voltage potential control202010,566,018Data storage device reverse biasing head element to counter electro-migration202010,424,323High-bandwidth STO bias architecture with integrated slider voltage potential control201910,388,305Apparatus and method for writing to magnetic media using an AC bias current to enhance the write field20199,705,072'Spin transfer torque tunneling magnetoresistive device having a laminated free layer with perpendicular magnetic anisotropy'20179,236,560'Spin transfer torque tunneling magnetoresistive device having a laminated free layer with perpendicular magnetic anisotropy'20169,087,534'Method and system for providing a read transducer having soft and hard magnetic bias structures'20159,087,527'Apparatus and method for middle shield connection in magnetic recording transducers'20159,047,902'Touchdown sensor having a more stable crystal structure for use in hard disk drives'20158,837,081'Laminated touchdown sensor for hard disk drives'20148,760,823'Method and system for providing a read transducer having soft and hard magnetic bias structures'20148,378,438'Method and system for providing magnetic elements having enhanced magnetic anisotropy and memories using such magnetic elements'20138,213,221'Magnetic shielding in magnetic multilayer structures'20127,957,179'Magnetic shielding in magnetic multilayer structures'20117,532,505'Method and system for using a pulsed field to assist spin transfer induced switching of magnetic memory elements'20097,502,249'Method and system for using a pulsed field to assist spin transfer induced switching of magnetic memory elements'20097,187,577'Method and system for providing current balanced writing for memory cells and magnetic devices'2007

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2007–2013Patents assigned to GRANDIS INC (6)· patent assignee history
2007–2009Based in St. Paul, MN, US· patent location history
2009–2012Based in Milpitas, CA, US· patent location history
2012–2015Patents assigned to DING YUNFEI (5)· patent assignee history
2013–2020Based in Fremont, CA, US· patent location history
2014–2016Patents assigned to WESTERN DIGITAL FREMONT LLC (6)· patent assignee history
2014Patents assigned to CHEN LAURENCE L (2)· patent assignee history
2019–2020Patents assigned to WESTERN DIGITAL TECH INC (6)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
GRANDIS INC62007–2013
WESTERN DIGITAL FREMONT LLC62014–2016
WESTERN DIGITAL TECH INC62019–2020
DING YUNFEIself52012–2015
CHEN LAURENCE L22014
Locations
LocationPatentsSpan
Fremont, California, US152013–2020
Milpitas, California, US32009–2012
St. Paul, Minnesota, US22007–2009