Abstract:
A disk drive suspension assembly has a laminated flexure that includes a structural layer, first and second conductive layers, a first dielectric layer disposed between the structural layer and the first conductive layer, and a second dielectric layer disposed between the first conductive layer and the second conductive layer. The first conductive layer includes at least a first conductive trace and a second conductive trace, and the second conductive layer includes at least a third conductive trace and a fourth conductive trace. The first conductive trace is electrically connected to the fourth conductive trace by a first conductive via through the second dielectric layer, and the second conductive trace is electrically connected to the third conductive trace through a second conductive via through the second dielectric layer. The third conductive trace overlies the first conductive trace, and the fourth conductive trace overlies the second conductive trace.
Abstract:
A method of assembling a head stack assembly (HSA) includes securing a flex cable to an actuator including an actuator arm having a side slot with a slot end. A first head gimbal assembly (HGA) is attached to the actuator arm. The first HGA includes a first laminated flexure having a first flexure tail with a first raised region that includes an out-of-plane bend. The first raised region is squeezed while inserting the first flexure tail partially within the side slot with the first raised region adjacent the slot end. The first raised region is allowed to expand into contact with the side slot adjacent the slot end. The first flexure tail is electrically connected to the flex cable.
Abstract:
A novel head gimbal assembly (HGA) for use in a disk drive is disclosed. Each of a plurality of electrically conductive traces of a flexure of the HGA includes a connection region that is aligned with and connected to a corresponding one of a plurality of electrically conductive bonding pads of a head. Each of the plurality of electrically conductive traces further includes a heating pad that is offset from its connection region by an offset distance. A dielectric layer of the flexure includes a first opening over the heating pad, a support layer of the flexure includes a second opening over the heating pad, and a load beam of the HGA includes a third opening disposed over the heating pad. During assembly, light may be shined through the openings and onto the heating pad until solder located in the connection region that is offset from the heating pad melts.
Abstract:
A flexure for supporting a head in a disk drive includes a tongue including a head mounting surface for attaching the head. The flexure further includes a first arm on a first side of the tongue. The first arm includes a structural material and has a first cross-sectional area in a plane perpendicular to the head mounting surface. The first cross-sectional area has a first centroid. The flexure further includes a second arm on the first side of the tongue. The second arm includes a conductive material layer. The second arm has a second cross-sectional area in the plane perpendicular to the head mounting surface. The second cross-sectional area has a second centroid. The second centroid is not offset from the first centroid by more than 10 microns in a direction perpendicular to the head mounting surface.
Abstract:
A miniature piezoelectric motor is described whereby in one embodiment teethed protrusions emanating inward from an annular-shaped stator engage with a rotor as the stator deforms in response to stresses applied to the stator by PZT pads attached thereto. The PZT pads are driven by voltage waveforms according to either a standing or traveling wave method and each deformation of the stator applies a tangential force to the rotor via a plurality of teethed protrusions, thereby moving the rotor a small amount. Flat PZT pads attached to flat facets on conductive surfaces of the stator are utilized in order to increase manufacturability and reduce cost. Configuration of the facets tunes the resonant frequency of the stator ensuring that the motor operates in the ultrasonic range, and also tunes the voltage level of drive signal required. Placement of PZT elements on the inner circumferential surface further optimizes overall motor size.
Abstract:
A suspension assembly for a disk drive includes a load beam and a flexure. The flexure has a first end including a plurality of bond pads for electrical connection to a slider and a second end having a tail for attachment to a flexible cable. The tail includes a support layer having a free end defining cutouts forming a plurality of peninsula-shaped regions, such that a plane oriented perpendicular to the support layer and disposed between the peninsula-shaped regions and extending beyond the free end of the tail does not cut through any support layer material. An insulating layer may be disposed on the support layer. A connection pad may be disposed on the insulating layer on each of the peninsula-shaped regions. Conductive traces may be disposed on the insulating layer to electrically connect each connection pad to a corresponding bond pad. A head is coupled to the bond pads.
Abstract:
A microactuator device for effecting fine positioning of a transducing head with respect to a selected track on a disk having: an S-shaped piezoelectric element with three or more legs having opposite ends, wherein either; one end of the piezoelectric element is affixed or connected to one end of the slider, and the other end is affixed or connected to the flexure member, or both ends of the element affixed to corresponding ends of the slider and the center is affixed to the flexure, for obtaining movement of the head transducer to enable fast and accurate tracking of read/write tracks on a high track density disk. Attachment of the one leg of piezoelectric element to the flexure produces translation movement of the slider and head transducer while attachment of the center leg of the element to the flexure and the two ends legs to the slider produces a rotary movement of the head transducer.
Abstract:
An integrated suspension for a hard disk drive is formed as a single-piece flat assembly. The design eliminates the need for mechanical reinforcement such as flange forming, and requires no additional weld processing to form the functional portion of the assembly. A partial etch process is used to reduce local thicknesses in the gimbal and hinge areas to reduce the overall stiffness of the suspension. The proximal end structure of the suspension is also built by partial etching to achieve higher natural frequencies. The suspension design also incorporates built-in load/unload features and two-sided, opposite-facing limiters to limit excessive slider displacement during the manufacturing process, loading/unloading, and non-operational shock environments.
Abstract:
A suspension system comprises a multiple letter flexure, a load beam and an arm. The load beam extends from the tip of the suspension all the way back to the rear of the arm. Datum holes are located in the load beam such that during assembly all reference points are made from the single load beam piece.
Abstract:
Systems for interconnecting magnetic heads of storage devices in a test assembly are provided. In one embodiment, the invention relates to a probe assembly for coupling a read head to a cavity gimbal assembly, the probe assembly including a plurality of conductive probes each including a body section including two substantially flat side surfaces and a bottom surface including a pad configured to be soldered to a corresponding pad of a laminated flexure of the cavity gimbal assembly, a spring section including an elongated arm extending away from the body section, the elongated arm shaped to make conductive contact with a pad on a trailing face of the read head, and a non-conductive adhesive layer attached to at least one of the two side surfaces, where each of the plurality of the conductive probes is attached to an adjacent one of the conductive probes by one of the adhesive layers.