Hitachi Global Storage Technologies Netherlands B.v.

Hitachi, Ltd.

Hgst Netherlands, B.v.

Hitachi Global Storage Technologies Japan, Ltd.

Western Digital Technologies, Inc.

Haruhide Takahashi

Kousaku Wakatsuki

Shigeo Nakamura

Shinobu Hagiya

Toshiki Hirano

Mikio Tokuyama

Toshihiko Shimizu

Hiromitsu Masuda

Hiroyasu Tsuchida

Irizo Naniwa

Tatsumi Tsuchiya

Masaaki Matsumoto

Nobumasa Nishiyama

Takayoshi Ohtsu

Takeji Sumiya

Masaki Odai

Hiroshi Agari

Yoshinobu Noguchi

Naoki Maeda

Hideaki Tanaka

Kenji Itoh

Yoshinori Takeuchi

Hidekazu Kohira

Kenji Mori

Hiromitsu Tokisue

Keiko Watanabe

Yokuo Saitoh

Jyousei Shimizu

Eisei Togawa

Kouji Kataoka

Yasuo Kojima

Yohtaroh Ichimura

Hideto Imai

Ryo Yoshida

Shigenori Takada

Shuichi Sugahara

Toshihisa Okazaki

Yousuke Fukumoto

Marutomo Gotou

Masaki Odal

Hitoshi Shindo

Yoshihiro Shiorishi

Akio Takatsuka

Andrew Hanlon

Tadashi Honzawa

Disclosed herein is a magnetic storage device that includes magnetic storage discs and a first carriage arm rotatably movable in a radial direction along a first one of the magnetic storage discs and within a region radially outward from the first one of the magnetic discs. The magnetic storage device includes a first suspension arm co-movably fixed to the first carriage arm and having a first-suspension-arm length extending from a proximate first-suspension-arm end of the first suspension arm to a distal first-suspension-arm end of the first suspension arm. The magnetic storage device also includes a second suspension arm co-movably fixed to the first carriage arm and having a second-suspension arm length extending from a proximate second-suspension arm end to a distal second-suspension arm end of the second suspension arm that is different from the first-suspension arm length.

Varying suspension arm length for magnetic storage device

A hard disk drive comprises a carriage assembly that comprises a carriage-arm tip with a swaging hole centered about a swaging axis. A first head-gimbal assembly comprises a tension baseplate on a first side of the carriage-arm tip with a tension swage boss located within the swaging hole. A second head-gimbal assembly comprises a compression baseplate on a second side of the carriage-arm tip with a compression swage boss located with the swaging hole. The tension swage boss comprises an uppercut that extends radially outward, away from the swaging axis, from a first backbore diameter to a second backbore diameter and a tension-boss undercut that extends radially outward, away from the swaging axis, from a tension-boss outer diameter to a first undercut diameter. The compression swage boss comprises a compression-boss undercut that extends radially outward, away from the swaging axis, from a compression-boss outer diameter to a second undercut diameter.

Carriage assembly with asymmetrical swage bosses and associated methods

Approaches to a suspension for a hard disk drive include having an adhered one or more piezo actuating device driven by a negative bias driving voltage. The negative bias driving voltage is lower than ground, therefore such voltage inhibits the migration of ions of an electrically conductive adhesive to an electrically conductive flexure layer, and inhibits the degradation of the resistance of an insulating material positioned between the conductive adhesive and the conductive flexure layer.

Reducing ion migration in a hard disk drive microactuator flexure assembly

Approaches to a suspension for a hard disk drive (HDD) include a non-hemispherical dimple for movably coupling a flexure with a load beam, where the length of the non-hemispherical dimple exceeds the width. Therefore, in the context of a microactuator system, piezo actuating devices may be installed closer together to improve the microactuator stroke performance in moving the slider over the disk surface.

Hard disk drive suspension dimple

A high-aspect ratio motion limiter of a microactuator and a method for fabrication are disclosed. In one embodiment, at least one low-aspect ratio gap is created in a substrate of a microactuator of a hard disk drive. The low-aspect ratio gap is then utilized to facilitate the creation of a high-aspect ratio motion limiter in the substrate of the microactuator.

High aspect ratio motion limiter of a microactuator and method for fabrication

A head-gimbal assembly. The head-gimbal assembly includes a suspension, a microactuator disposed on the suspension, and a head-slider bonded to the microactuator. The head-gimbal assembly further includes a connection pad disposed on the suspension, a connection pad disposed on the microactuator and formed over an edge between a side surface and a top surface of the microactuator to have a bend portion with an obtuse angle, and a metallic interconnection joint for interconnecting the connection pad of the suspension with the connection pad of the microactuator.

Head-gimbal assembly, microactuator, and manufacturing method of the microactuator

Approaches for protecting a component when a hard-disk drive (HDD) experiences a mechanical shock. An HDD includes a suspension comprising a load beam, a gimbal, and a flexure tongue. A component, such as a microactuator, is mounted on the suspension. The flexure tongue extends to at least the edge of the microactuator that is furthest from the gimbal. The flexure tongue prevents the microactuator from contacting the load beam when the HDD receives a mechanical shock. Alternately, the flexure tongue may comprise a tip portion that extends beyond the edge of the microactuator that is furthest from the gimbal, and the tip portion of the flexure tongue may deform to act as shock absorber when the HDD receives a mechanical shock. Alternately or additionally, a padding material may be used to prevent the microactuator or the flexure tongue from contacting the load beam when the HDD receives a mechanical shock.

Suspension for protecting a component from mechanical shock

Embodiments of the present invention help to suppress reduction of the operation quantity of a microactuator. According to one embodiment, a microactuator comprises a silicon substrate and a piezoelectric element. The silicon substrate has some rigidity and provides elastic counter force to the piezoelectric element. In the piezoelectric element, a secondary piezoelectric layer is laminated on a primary piezoelectric layer opposite from the silicon substrate. The contraction force of the secondary piezoelectric layer acts on the primary piezoelectric layer so that it bends toward the secondary piezoelectric layer opposite from the silicon substrate. When the primary piezoelectric layer expands, the contraction force of the secondary piezoelectric layer acts on the primary piezoelectric layer so that it warps against the primary piezoelectric layer.

Microactuator, head gimbal assembly, and magnetic disk drive

Embodiments of the present invention help to prevent dropout of a head slider from an micro electrical mechanical system (MEMS) and damage of the MEMS. In an embodiment of the present invention, a suspension for a slider dynamic electric test (DET) comprises an MEMS for supporting a head slider. The MEMS has a clamper for holding a head slider and the clamper moved by an external force can attach or detach a head slider. The suspension comprises limiters for limiting the clamper's lateral movement. The limiters limit the clamper's undesirable movement, which prevents the clamper's lateral movement in attaching a head slider, a head slider's dropout and the MEMS's damage caused by a contact with a magnetic disk, or a head slider's dropout and the MEMS's damage in handling.

Micro electro mechanical system and head gimbal assembly

Embodiments of the present invention relate to approaches to effectively let noise on a head slider bonded to a silicon substrate of a microactuator, escape to the ground. A head gimbal assembly (HGA) according to an embodiment of the present invention comprises a microactuator bonded to a gimbal tongue. The microactuator comprises a piezoelectric element and a movable part for moving in response to expansion or contraction of the piezoelectric element. The motion of the movable part causes a head slider to slightly move. The microactuator further comprises a conductive path including an impurity-containing silicon layer formed on the silicon substrate. The conductive path transmits electric charge of the head slider to a suspension. The conductivity of the impurity-containing silicon layer is lower than the one of the silicon substrate so that the noise charge of the head slider may escape to the suspension.

Microactuator, head gimbal assembly, and disk drive device

A thermally insulating bonding pad for solder reflow is described. The bonding pad includes a structure. The structure forms the bonding pad. The bonding pad further includes an insulator formed on the structure. The insulator is configured to be interposed between the structure and a substrate of a component onto which said bonding pad is to be disposed. The bonding pad provides thermal insulation for said substrate when said bonding pad is subject to a solder reflow process being performed thereon.

Thermally insulating bonding pad structure for solder reflow connection

A micro-electromechanical signal transmission line is made from an electrically conductive material. It has a first distal end and a second distal end. The second distal end is free to move with respect to said first distal end. There exists an unsupported region between the first distal end and the second distal end. The unsupported region is juxtaposed at a controlled distance from at least one grounded conductive surface.

High frequency interconnect signal transmission lines

In a dynamic electric test, a head slider is to be fixed positively to a suspension and to be removable easily from the suspension in accordance with the result of the test. In one embodiment of the present invention a head gimbal assembly includes a head slider, a gimbal and a load beam. The head slider is disposed on a gimbal tongue and is held with an urging force of a resilient clamp at a position between the resilient clamp formed on the leading side of the head slider and connecting terminals formed on the opposite side thereof.

Suspension for hard disk drive which enables easy dynamic electric testing

Embodiments in accordance with the present invention provide a magnetic head slider to be easily mounted on or dismounted from a suspension and can hold a magnetic head slider so as not to be removed due to a shock resultant from handling during a characteristic test and a manufacturing process. A load beam is formed with protruding portions on both sides. A flexure includes a frame portion, a plate portion, a spring portion, an E-shaped pressing portion, and a probe portion. The plate portion extends from a guide portion of the frame portion. The probe portion may be formed by partially cutting out the frame portion. A limiter is formed on both sides of the plate portion. The limiter protrudes from the rear of the load beam and has a hook-shaped tip. The hook-shaped portion of the limiter engages with the protruding portionof the load beam to limit excess vertical movement of the flexure. A gap may be formed between the limiter and the protruding portion.

Suspension for magnetic head slider characteristic test

Growing community of inventors

Kanagawa, Japan

Haruhide Takahashi