Nhk Spring Co., Ltd.

Fujitsu Corporation

Toshiba Storage Device Corporation

Hideki Kashima

Chihiro Kono

Hiroshi Okamoto

Takashi Horiuchi

Noriyuki Saito

Osamu Iriuchijima

Ryouzou Ohmoto

Kazuhiko Ohtake

Masao Hanya

Shinji Koganezawa

Toshiki Ando

Yasuji Takagi

Yoichi Ikeji

Hirofumi Suzuki

Takeshi Shimoda

Tsukasa Higashi

Kouichi Toukairin

Tsutomu Fukuda

Jun Soga

Osamu Ohkawara

Osamu Kajitani

Itsuo Yasuda

Masato Kitakata

Yuji Sugita

Akinobu Ishizaka

According to an embodiment, a bonding strength test device measures bonding strength between a flexure of a suspension of a hard disk drive and microactuators mounted on a gimbal of the flexure. The bonding strength test device includes a clamp, dummy, and device body. The clamp fixes the flexure. The dummy is adhered to the microactuators. The probe is engaged in the dummy. The device body measures a tensile load applied to the probe while the probe is pulled toward a direction to be apart from the flexure.

Bonding strength test device for electronic components and method for bonding strength test

An electrode structure of a piezoelectric element is provided. The piezoelectric element() constitutes a piezoelectric actuatorattached to an attaching partof an object, to minutely move a movable partof the object relative to a base partof the object according to deformation occurring on the piezoelectric element in response to a power applied state of the piezoelectric element. The electrode structure in response an electrodeformed on one of a pair of electrode forming facesandof the piezoelectric element on an inner side of a peripheral zone, the peripheral zone being defined along the periphery of the electrode forming faceon which the electrode is formed. The electrode structure also includes a non-electrode partformed in the peripheral zone. Even if the peripheral zoneof the electrode forming facehaving a short-circuit causing possibility touches the attaching part, no short circuit occurs.

Method of forming electrode of piezoelectric element

The piezoelectric actuator of a head suspension has an actuator base and at least a piezoelectric element, the actuator base connected to the base part of the load beam of the suspension and having at least an opening, the piezoelectric element attached to the opening and deforming in response to a voltage applied thereto to effect displacement of the front end of the load beam. A nonconductive filler is fitted into a circumferential channel defined between a circumferential edge of an opening in the actuator base and a circumferential side face of the piezoelectric element facing the circumferential edge of the opening to maintain a width of the circumferential channel. A nonconductive adhesive part is formed in the circumferential channel and joins the circumferential edge of the opening and the circumferential side face of the piezoelectric element together.

Head suspension piezoelectric actuator with a nonconductive adhesive joining together the circumferential edge of an actuator base opening with a circumferential side face of the piezoelectric element

An electrode structure of a piezoelectric element is provided. The piezoelectric element() constitutes a piezoelectric actuatorattached to an attaching partof an object, to minutely move a movable partof the object relative to a base partof the object according to deformation occurring on the piezoelectric element in response to a power applied state of the piezoelectric element. The electrode structure includes an electrodeformed on one of a pair of electrode forming facesandof the piezoelectric element on an inner side of a peripheral zone, the peripheral zone being defined along the periphery of the electrode forming faceon which the electrode is formed. The electrode structure also includes a non-electrode partformed in the peripheral zone. Even if the peripheral zoneof the electrode forming facehaving a short-circuit causing possibility touches the attaching part, no short circuit occurs.

Electrode structure of piezoelectric element for head suspension

A piezoelectric element with electrode is capable of preventing an assembling error. The piezoelectric element includes a piezoelectric body configured to deform according to polarity in response to a voltage applied thereto, electrodes formed on surfaces of the piezoelectric body, respectively, a non-electrode part formed on at least one of the surfaces of the piezoelectric body, the non-electrode part continuing to the one electrode that is on the at least one surface of the piezoelectric body, and a boundary between the non-electrode part and the one electrode. The boundary has a pattern to indicate the polarity of the piezoelectric element.

Piezoelectric element with electrode and head suspension

A suspension device including a flexure with conductors is provided with an anti-ESD section. The anti-ESD section includes a metal plate, a insulating layer, a first electrically conductive member formed of a pair of read conductors, a second electrically conductive member formed of a pair of write conductors, a heater conductor, semiconductive layers, etc. The semiconductive layers are grounded to the metal plate and electrically isolated from one another by an insulating portion.

Suspension device

In a disc drive suspension having a load beam and a flexure lapped on the load beam, the load beam and the flexure are fixed to each other by a laser weld. The load beam has an insular region including the laser weld of the load beam and a partially etched portion formed around the insular region. The partially etched portion is thinner than the insular region. The etched portion is formed around the whole circumference of the insular region.

Disc drive suspension including a load beam that has an insular region at which a laser weld is formed provided in an interior of a partially etched portion

A piezoelectric element of a piezoelectric actuator is clamped by two electrodes, each of which has a conductive layer on a insulating layer. At least a connection terminal is formed by extending the conductive layer outside the insulating layer.

Piezoelectric actuator head suspension unit employing piezoelectric actuator, and magnetic disk drive employing head suspension unit

A head suspension provided with a plate welding structure relaxes a laser beam positioning accuracy, improves a mass production ability, suppresses the generation of spattered matter, and prevents the deformation of plates during welding. The head suspension () has a base plate () to be attached to a carriage and a load beam () having a rigid part () and a resilient part (). The load beam is supported by the base plate and applies load on a slider that is arranged at a front end of the load beam. A reinforcing plate () is laid over the base plate, and a laser beam is emitted to a weld spot to weld the reinforcing plate and base plate together. The reinforcing plate is provided with thin parts () each containing the weld spot. Each thin part is irradiated with a laser beam to weld the base plate and reinforcing plate together.

Plate welding structure and head suspension

A head suspension for a disk drive has a base plate () to be attached to a carriage of the disk drive and a load beam () consisting of a rigid part () and a resilient part (), to apply load onto a slider. The rigid part and resilient part are separately formed. The rigid part is joined to a first side () of the resilient part. The suspension also has a reinforcing plate () to hold and fix a second side () of the resilient part between the reinforcing plate and the base plate. The base plate stably and resiliently supports the load beam. This suspension satisfies required characteristics.

Method of manufacturing head suspension for disk drive

An extending portion extending from the proximal portion of the load beam of a disc drive suspension has a first hole in which a first positioning pin can be inserted and a second hole in which a second positioning pin can be inserted. The first hole has an elongated shape that allows the extending portion to move relatively to the first positioning pin in a width direction. The second hole is a circular large hole that allows the extending portion to move relatively to the second positioning pin in the width direction and an axial direction. A third hole and a fourth hole are formed in a flexure. The third hole has an elongated shape that allows the flexure to move relatively to the first positioning pin in the axial direction. The fourth hole has an elongated shape that allows the flexure to move relatively to the second positioning pin.

Disc drive suspension having features enabling relative positioning of load beam and flexure

A suspension comprises a base plate, a load beam, and a hinge member. An extending portion is provided on the side of the hinge member. A step forming portion is formed between the base plate mounting portion and the extending portion. The step forming portion has a difference in level such that the extending portion is situated inside the base plate mounting portion with respect to its thickness direction. An end portion of the flexure fixed on the extending portion is situated inside the surface of the base plate mounting portion with respect to the thickness direction.

Disc drive suspension having an offset portion for mounting an end of a flexure

An extending portion of a load beam is formed having a first hole in which a first positioning pin can be inserted and a second hole in which a second positioning pin can be inserted. The first hole has an elongated shape that allows the extending portion of the load beam to move relatively to the first positioning pin in a width direction. The second hole is a circular large hole that allows the extending portion to move relatively to the second positioning pin in the width direction and an axial direction. A third hole and a fourth hole are formed in a flexure. The third hole has an elongated shape that allows the flexure to move relatively to the first positioning pin in the axial direction. The fourth hole has an elongated shape that allows the flexure to move relatively to the second positioning pin.

Disc drive suspension with positioning features enabling load beam and flexure to be positioned relative to one another

An extending portion of a hinge member is formed having a first hole in which a first positioning pin can be inserted and a second hole in which a second positioning pin can be inserted. The first hole has an elongated shape that allows the extending portion of the hinge member to move relatively to the first positioning pin in a width direction. The second hole is a circular large hole that allows the extending portion to move relatively to the second positioning pin in the width direction and an axial direction. A third hole and a fourth hole are formed in a flexure. The third hole has an elongated shape that allows the flexure to move relatively to the first positioning pin in the axial direction. The fourth hole has an elongated shape that allows the flexure to move relatively to the second positioning pin.

Growing community of inventors

Aiko-gun, Japan

Hideki Kashima