Magnecomp Corporation

David Glaess

Kuen Chee Ee

Long Zhang

Peter Hahn

Preecha Sudachun

Keith Allan Vanderlee

Ekaratch Pankaew

Chris Dunn

Johnathan Phu

Johnathan Hy-tho Phu

Treesoon Kotchaplayuk

Amornrat Jaturawit

Chanatkarn Angsutanasombat

Benjapa Tanampee

Rakkiet Warinsirirux

Harlan Kragt

Piyawech Keawlai

A trace gimbal is described herein. In some embodiments, the trace gimbal includes outer struts including a front outrigger at a distal end of the trace gimbal and a rear outrigger at a proximal end of the trace gimbal. The front outrigger includes a distal front outrigger and a proximal front outrigger, and the rear outrigger includes a distal rear outrigger and a proximal rear outrigger. The trace gimbal further includes a middle strut extending in a width direction of the trace gimbal and adjoining the proximal front outrigger to the rear outrigger, and an inner strut connecting the middle strut to a slider tongue. The inner strut includes a slot, and the inner strut and the middle strut adjoin the outer gimbal struts to the slider tongue.

Hard disk drive gimbal design with high yaw mode

A driving circuit is described. The driving circuit includes: a first piezoelectric actuator including at least one piezoelectric element disposed between a first electrode and a second electrode, the first electrode configured to connected to a first ground at a first terminal and the second electrode configured to connected to an amplifier at a second terminal. The driving circuit includes a second piezoelectric actuator including at least one piezoelectric element disposed between a first electrode and a second electrode, the first electrode configured to connected to a control signal at a first terminal and the second electrode connected to a second ground at a second terminal. And, the first terminal of the first piezoelectric actuator and the first terminal of the second piezoelectric actuator are configured such that the first piezoelectric actuator and the second piezoelectric actuator are symmetrical and have similar polarity.

Single line drive circuit enabling identical actuator orientation

A dielectric layer configured to overlay a spring metal layer in a suspension assembly is described. The dielectric layer includes a tongue portion including a proximate end and a distal end, trace portions extending from the tongue portion, and an aperture aligned with the void and defined by the tongue portion. The aperture includes an elongated opening with opposing ends partially aligning with the central opening of the void. The aperture further includes slits extending from the opposing ends of the elongated opening and at least partially aligned with slits of the void in the spring metal layer.

Suspension damping

Examples of a load beam are provided. The load beam includes a base portion with an opening at a distal end. The opening is configured to receive a heat assisted magnetic recording (HAMR) head slider extending therethrough. The load beam also includes at least one load beam tab such that the load beam tab is further away from the base portion and a top surface of the HAMR head slider.

Load beam limiter tabs for HAMR head slider protection

A suspension assembly includes a baseplate having an upper surface and a lower surface opposite the upper surface, a load beam mounted to the baseplate, a cylindrical hub extending from the upper surface, wherein the cylindrical hub comprises an inner surface that defines a swage hole extending through the baseplate, and a plurality of dimples protruding from the upper surface of the baseplate, wherein each of the dimples includes a rounded side protruding from the upper surface of the baseplate and terminating in an apex. The apexes of the dimples define a contact plane for engaging with the lower surface of the actuator arm swaged to the cylindrical hub.

Suspension assembly with dimple features for engagement with actuator arm

A trace gimbal is described. The trace gimbal includes outer struts including a front outrigger at a distal end of the trace gimbal and a rear outrigger at a proximal end of the trace gimbal. The front outrigger includes a distal front outrigger and a proximal front outrigger. The rear outrigger includes a distal rear outrigger and a proximal rear outrigger. The trace gimbal also includes a middle strut extending from the distal rear outrigger and adjoining the proximal front outrigger to the rear outrigger. The middle strut extends from a slider tongue adjoining the outer gimbal struts to the slider tongue.

Gimbal strut configuration for high yaw suspension design

Examples of a load beam are described herein that include a lifter tab extending towards a distal end, a dustpan defined by a dustpan forming line at a proximal end and the lifter tab at a distal end and a first and second plurality of rail sections separated by a longitudinal axis. The first and second plurality rail sections including a rear rail, an intermediate rail, and a front rail. The rear rail extends from a proximal end of the load beam to the first intermediate rail, the intermediate rail extends from the first rear rail to the dustpan forming line, and the front rail extends from the dustpan forming line to a proximal end of the lifter tab.

Transitional load beam rail for hard disk drive suspensions

A flexure assembly is described. The flexure assembly includes a gimbal portion on configured to receive a slider. The gimbal portion includes a first surface and a second surface which is opposite to the first surface. The slider is mounted on the second surface. The flexure assembly also includes a pair of microactuator elements. The flexure assembly also includes a tongue of the gimbal portion on which the slider is mounted. The tongue includes a dimple point which represents the center of the tongue. The flexure assembly also includes a pair of first supporting portions and a pair of second supporting portions of the gimbal portion. A pair of end portions are individually secured to the tongue and the first supporting portions and the pair of second supporting portions. The flexure assembly also includes a conductive circuit portion unsupported between a first stationary part and the pair of end portions.

Micro-dual stage actuated gimbal design

A baseplate for a disk drive suspension is provided. The baseplate includes a receiving space at a distal end configured to mate with a spring of a load beam. The receiving space partially extends a length of the baseplate. The baseplate also includes a swage hub at a proximal end and an indented surface surrounding the swage hub. The proximal end is opposite the distal end. The indented surface is at least partially defined by a baseplate support section.

Low profile suspension design

A PZT microactuator such as for a hard disk drive has a restraining layer bonded on its side that is opposite the side on which the PZT is mounted. The restraining layer comprises a stiff and resilient material such as stainless steel. The restraining layer can cover most or all of the top of the PZT, with an electrical connection being made to the PZT where it is not covered by the restraining layer. The restraining layer reduces bending of the PZT as mounted and hence increases effective stroke length, or reverses the sign of the bending which increases the effective stroke length of the PZT even further. The restraining layer can be one or more active layers of PZT material that act in the opposite direction as the main PZT layer. The restraining layer(s) may be thinner than the main PZT layer.

Multi-layer PZT microactuator with active PZT constraining layers for a DSA suspension

Examples of a suspension are provided. The suspension includes a mount plate attached to a load beam at a suspension assembly attachment point. The suspension may include a first actuator and a second actuator located at the mount plate. The first actuator is shaped as a non-right angle parallelogram spanning across a first opening in the mount plate. The second actuator is shaped as a non-right angle parallelogram spanning across a second opening in the mount plate. The first and second actuators are configured to deflect the distal end of the mount plate, which causes the load beam to rotate with a rotation center located along the load beam.

Non-right angle parallelogram PZT for suspension resonance improvement

A hard disk drive (HDD) includes a suspension connected to a stack arm. The suspension includes a mount plate, a hinge, a load beam, and a circuit. The mount plate includes a bottom surface facing a disk and an ear portion extending from a side edge of the mount plate. The bottom surface includes a planar region, a first indented region vertically recessed relative to the planar region, and a second indented region located at the ear portion and vertically recessed relative to the planar region. The load beam terminates in a load beam hinge is connected to the first indented region. The circuit extends along the first and second indented regions.

Mount plate with suspension circuit indentations

A flexure is described, which includes conductive traces extending from a proximal end of the flexure to a distal end of the flexure. The flexure also includes a plurality of outer gimbal struts configured to define an opening at the proximal end of the flexure. The flexure also includes an oblong feature extending into the opening, the oblong feature defines an aperture. The conductive traces include a first semi-circular conductive trace portion overlapping a first section of the oblong feature at a proximal end of the aperture extending to a distal end of the aperture. The conductive traces include a second semi-circular conductive trace portion overlapping a second section of the oblong feature at a proximal end of the aperture extending to the distal end of the aperture. The first and second semi-circular conductive trace portions define the aperture.

Hard drive flexure including a trace overlapping a base layer feature

A flexure is described herein. The flexure includes a slider tongue with a proximal end and a distal end. The sliding tongue including a leading edge at the proximal end prone to contact an undersurface of a load beam attached to the flexure. The flexure also includes a magnetic read/write head slider attached to the slider tongue at the distal end, at least one PZT microactuator affixed to the slider tongue, between the proximal end and the distal end, and at least one dampening device at the leading edge of the slider tongue configured to reduce an impulse during a non-operational shock event and reduce stress on the at least one PZT microactuator.

Growing community of inventors

Bangkok, Thailand

David Glaess