Seagate Technology Incorporated

Andre Y Liem

CheeWai Seetoh

Niroot Jierapipatanakul

Joseph HengTung Lau

Jierapipatanakul Niroot

Michael JooChiang Toh

Mo Xu

ChoonKiat Lim

PohLye Lim

Joseph C Liu

WaiOnn Chee

Victor ChiSiang Choo

ChorShan Cheng

SiewMing Ng

Terang KongBeng Thia

Sen Chai Khew

Longitudinal edges of an actuator arm are provided with stiffening elements in order to raise natural resonant frequencies of the arm so as to prevent resonance from occurring. The stiffening element is shaped and positioned so as to be able to individually 'tune' the natural resonant frequency of a given bending mode without significantly affecting the natural frequencies in other bending modes.

Method of making a data storage device having an actuator with a rail

An actuator assembly of a disc drive having an actuator arm rotatably mounted adjacent a data disc. The actuator arm has a top surface and a bottom surface, and includes a head gimbal assembly support portion located at one end of the actuator arm. The actuator assembly further includes an arm circuit fastened to the top surface of the actuator arm. The actuator assembly may additionally include a head gimbal assembly that electrically couples the data transducer and the arm circuit. The gimbal circuit is partially routed along the head gimbal assembly and over the top surface of the actuator arm. Alignment apertures on the arm circuit and the head gimbal circuit and alignment pins on the actuator arm may be used for positioning of the circuits over the top surface of the actuator arm.

Actuator system for disc drive

A dual plane single-stage actuator is disclosed. The actuator includes a step portion between the coil and head support portions, which increases its stiffness while permitting the coil support portion and head support portion of the actuator to lie in different planes. This allows the actuator to be installed in low-profile drives.

Dual plane actuator

Disc drives are made with an actuator designed with at least one asymmetrical arm having two masses that move out of phase. The arm is modified by removing a portion of the higher-energy (longitudinal) side, the one with the greater total time-averaged strain energy. This modification reduces the phase difference between the first and the second arm, particularly for a relevant frequency range of interest. Disc drives made by this method exhibit a generally reduced out-of-phase motion, enhancing performance during seeking and track following, especially for arms with two heads that interact with surfaces of opposing discs.

Disc drive with actuator arm configured for reduced out-of-phase motion

A voice coil for a head positional assembly of a disc drive. The voice coil including a dampener which dampens vibrations occurring in the voice coil. The dampener includes a constraint material and a viscoelastic material.

Viscoelastic voice coil damper for disc drives

Embodiments of apparatus are directed to a rotational shock tester system comprising a disc drive support system, a drop mechanism and an impact apparatus. The disc drive support system includes a rotation plate, wherein a disc drive is coupled to the rotation plate. The drop mechanism is coupled to the disc drive support system and includes an elevating apparatus, wherein the elevating apparatus elevates and releases the rotation plate which is supporting the disc drive. The impact apparatus is releasably coupled to the drop mechanism and is aligned with the rotation plate such that upon release of the rotation plate, the rotation plate impacts the impact apparatus such that the impact apparatus imparts an angular acceleration to the rotation plate and imparts a rotational shock to the disc drive.

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Singapore, Singapore

Andre Y Liem