Inventor

LIU YANNING

US51 patents

⚠️ This page may combine multiple inventors who share the name “LIU YANNING”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LIU YANNING

WESTERN DIGITAL TECH INC

Disk drive performing lifetime logging of microactuator sensitivity

Disk drive head suspension assembly with load beam inner rails between piezo actuator elements

Disk drive head gimbal assembly having a jumper in a flexible printed circuit overlap region

Disk drive head suspension assembly having a DLC coating between dimple and tongue

Head gimbal assemblies and methods for measuring slider parameters

Disk drive head suspension assembly with piezo element stress relief features

Tethered gimbal on suspension for improved flyability

Shared disk configuration in a multiple actuator hard disk drive

Suspension assembly having a microactuator grounded to a flexure

Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands

Data storage device controlling dual stage actuator with triple stage servo loop

Data storage device detecting fly height instability of head during load operation based on microactuator response

Disk drive head suspension tail with ground pad outside of bonding region

Disk drive detecting crack in microactuator

Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surface

Suspension flexure forming for gimbaling clearance

Data storage device independently driving outer and inner fine actuators

Swage plate assembly with swage boss insert

Angled and elongate lift tab for magnetic storage device

Suspension assembly having a microactuator grounded to a flexure

Offset swage baseplate for stacked assembly

Data storage device independently driving outer and inner fine actuators

Head gimbal assembly having a flexure tail with cover layer standoff islands

Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surface

Data storage device adjusting range of microactuator digital-to-analog converter based on operating temperature

Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islands

Servo interface circuitry for parallel self-servo write

Parallel self-servo write circuitry in a data storage device

Preamplifier circuit for parallel self-servo write

Parallel self-servo write in a data storage device

LIU YANNING

Disk drive detecting head touchdown from microactuator signal

Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surface

Disk drive head gimbal assembly having a flexure tail with features to facilitate bonding

Disk drive detecting disk boundaries using microactuator

Disk drive detecting crack in microactuator

Disk drive detecting defective microactuator

SHUM WING C

Suspension assembly having a microactuator grounded to a flexure

Suspension assembly having a microactuator bonded to a flexure

Disk drive head gimbal assembly having a flexure tail with features to facilitate bonding

TEO KIA MOH

Disk drive head gimbal assembly having a flexure tail with transverse flying leads

Suspension assemblies for minimizing stress on slider solder joints

SEAGATE TECHNOLOGY LLC

Asymmetric disk surface properties in one head disk drives

Asymmetrical storage disk for a disk drive

WANG XIN

Methods, devices and systems for characterizing polarities of piezoelectric (PZT) elements of a two PZT element microactuator

TRAN GREGORY

Test ramp for testing microactuators used in a multi-head disk drive

MAXTOR CORP

Latch apparatus for latching an actuator arm assembly in a disk drive

PENN STATE RES FOUND

Active-passive hybrid constrained layer for structural damping augmentation

ERICSSON TELEFON AB L M

Method and apparatus for detecting event in communication network

SUN YU

Radial position seek tuning for acoustic performance

SAMSUNG ELECTRONICS CO LTD

Passive test circuit used to determine a back EMF of a voice coil motor during application of a bias voltage