Marvell International Limited

Mengjun Liu

Quan Jiang

Chiew Leong Wong

Ming Chou Lin

Ke Gan

Wuzhong Lin

Zhimin Yuan

Bo Liu

Li Wang

Chun Lian Ong

Siang Huei Leong

Weiya Xi

Khai Leong Yong

Jianzhong Shi

Kui Cai

Kheong Sann Chan

Chao Bi

Pantelis Sophoclis Alexopoulos

Zhi Yong Ching

Qide Zhang

Budi Santoso

Jing Zhang

Moulay Rachid Elidrissi

Zhimin He

Guchang Han

Tiejun Zhou

Jiang Feng Hu

Leonard Gonzaga

Stephen Ralph Viskochil

Sufui Sophia Tan

Wee Kiat Lim

Yansheng Ma

Yin Quan Yu

Kannan Sundaravadivelu

Ningyu Liu

Jianqiang Mou

Boon Long Ibrahim See

Venkataramanan Venkatakrishnan

Cheng Peng Tan

Chong Wee Lee

Eng Teo Ong

Phyu Hla Nu

Wei Hua

Cheng Su Soh

Shengkai Yu

An axial field motor and a method of assembling the motor are provided. The hard disk drive includes a spindle motor having a fluid dynamic bearing (FDB) motor hub, a hard disk drive housing and a base insert. The hard disk drive housing houses the spindle motor therewithin and has an upper housing and a base, the base including a first material. The base insert has ferromagnetic properties, includes a second material and has a flat circular bottom portion and an outer circumferential vertical portion. The flat circular bottom portion of the base insert is located between the FDB motor hub and the base to enhance yield strength therebetween and a bottom portion of the FDB motor hub is surrounded by the outer circumferential vertical portion of the base insert to generate preload for the FDB motor hub.

Hard disk drive spindle motor including a base and a base insert formed from different materials

A spindle motor for a hard disk drive includes a base and a bearing assembly coupled to the base. The bearing assembly includes a sleeve configured to rotatably support a shaft therein. A rotor hub is affixed to the shaft so as to be rotatable with the shaft about a rotational axis. A stator is arranged in between the rotor hub and the base. A first magnet is arranged over the stator and on a bottom surface of the rotor hub. In particular, the rotor hub includes a body portion, a peripheral wall portion extending from the body portion in a direction towards the base, and a flange portion having a disk seating surface configured for supporting one or more disks thereon. The peripheral wall portion is configured to at least partially surround the stator in a radial direction. There is also provided a method of fabricating the spindle motor and a hard disk drive incorporating the spindle motor.

Spindle motor for hard disk drive and method of fabrication thereof

According to an embodiment of the present invention, a data storage device comprising a motor having a stator is disclosed. The stator may include a substrate having a first surface and a second surface opposite to the first surface; and a n-phase winding arrangement having n phase windings; wherein each phase winding comprises m flat fractional-pitch coils arranged on the first surface of the substrate such that the coils are spaced apart uniformly along a closed loop and connected in series; wherein each coil together with an angular section of the substrate between the coil and an adjacent coil of the same phase winding defines a stator pole-pair; and wherein m is an integer larger than 1.

Data storage device

Growing community of inventors

Singapore, Singapore

Mengjun Liu