HEAD SUSPENSION ASSEMBLY FOR TESTING A SLIDER
A head suspension assembly for testing a slider. The head suspension assembly includes a load beam assembly and a gimbal coupled to the load beam assembly. A clamp is coupled to the gimbal. The clamp is configured to releasably secure a slider in the head suspension assembly. The clamp includes an alignment feature for positioning the slider in the head suspension assembly.
In one embodiment, a head suspension assembly is provided. The head suspension assembly includes a load beam assembly and a gimbal coupled to the load beam assembly. A clamp is coupled to the gimbal. The clamp is configured to releasably secure a slider in the head suspension assembly. The clamp includes an alignment feature for positioning the slider in the head suspension assembly.
In another embodiment, an apparatus includes a load beam assembly and a gimbal coupled to the load beam assembly. The gimbal includes a stopper. A clamp is coupled to the gimbal. The clamp is configured to releasably secure a slider and to urge the slider towards the stopper.
In yet another embodiment, a method of making a head suspension assembly is provided. The method includes providing a load beam assembly, and coupling a gimbal to the load beam assembly. The method further includes coupling a clamp to the gimbal. The clamp is capable of releasably securing a slider in the head suspension assembly. The method also includes providing an alignment feature in the clamp for positioning the slider in the head suspension assembly.
Other features and benefits that characterize embodiments of the disclosure will be apparent upon reading the following detailed description and review of the associated drawings.
Embodiments of the disclosure generally relate to testing components of a data storage device during manufacture of the data storage device. A disc drive is one example of a data storage device. In a disc drive, data is stored on a storage disc in concentric tracks. In many drives, the data is stored using a write head that changes a physical property of the disc. The data is read from the disc by positioning a read head over a desired track and sensing the physical properties of the disc along the track. For example, in a magnetic disc drive, the read head senses magnetic moment boundaries along the disc.
The process for producing a read head or a write head varies depending upon the type of read head or write head being produced. Nonetheless, substantially all head manufacturing methods share common characteristics, such as high degree of manufacturing complexity, small feature sizes, and a susceptibility to manufacturing errors. Because of this, each production method generates some heads that may not meet specifications. In order to detect faulty heads accurately, the transducing heads are tested over a disc surface. In particular, each transducing head is flown over a disc surface while it performs writing and/or reading operations. Early in the disc drive manufacturing art, this type of testing was performed after the head was assembled in a complete disc drive. However, this in-drive testing proved to be costly because the disc drive had to be rebuilt if the head was found to be faulty.
To address the cost of in-drive testing, a “spin-stand” which allowed a head-gimbal assembly (HGA) to be tested before it was placed in a disc drive was developed. An HGA includes a slider having a transducing head, an armature (beam and gimbal strut) for positioning the slider, and a flexible circuit that carries electrical signals between the head and drive electronics. In general, a spin-stand includes a spinning computer disc and a mounting support that supports the HGA and moves the transducing head to a desired position over the spinning disc. The transducer is substantially more delicately fabricated that the other components of the HGA. The spin-stand allows a series of tests to be performed on the transducing head including, for example, error-rate testing, pulse width-fifty testing, track average amplitude testing and track scan testing. Often, the failure of the HGA is due to the electrical malfunctioning of the transducer. Since the components of the HGA are permanently attached, the entire assembly is rejected if a transducer is found to be defective. Rejecting the entire assembly which includes the base plate, load beam, gimbal strut and flex circuit in addition to the slider with the embedded transducer is wasteful, unnecessarily increasing manufacturing costs.
In embodiments of the disclosure a head suspension assembly for a slider tester is provided, which includes a clamp that is coupled to a gimbal and a load beam. The assembly also includes an electrical interconnect, such as a flex circuit or other wiring. The clamp is configured to releasably secure a slider in the head suspension assembly such that the slider is electrically coupled to the electrical interconnect when properly positioned in the clamp.
It should be noted that the same reference numerals are used in different figures for same or similar elements. It should also be understood that the terminology used herein is for the purpose of describing embodiments, and the terminology is not intended to be limiting. Unless indicated otherwise, ordinal numbers (e.g., first, second, third, etc.) are used to distinguish or identify different elements or steps in a group of elements or steps, and do not supply a serial or numerical limitation on the elements or steps of the embodiments thereof. For example, “first,” “second,” and “third” elements or steps need not necessarily appear in that order, and the embodiments thereof need not necessarily be limited to three elements or steps. It should also be understood that, unless indicated otherwise, any labels such as “left,” “right,” “front,” “back,” “top,” “bottom,” “forward,” “reverse,” “clockwise,” “counter clockwise,” “up,” “down,” or other similar terms such as “upper,” “lower,” “aft,” “fore,” “vertical,” “horizontal,” “proximal,” “distal,” “intermediate” and the like are used for convenience and are not intended to imply, for example, any particular fixed location, orientation, or direction. Instead, such labels are used to reflect, for example, relative location, orientation, or directions. It should also be understood that the singular forms of “a,” “an,” and “the” include plural references unless the context clearly dictates otherwise.
Platform 208 can be supported by a cushion of air during movement, and can be stabilized in a particular position by the application of a vacuum between platform 208 and granite base 214 located directly below platform 208. Similar to platform 208, carriage 216 can be supported by a cushion of air during movement and locked into position by application of a vacuum. Position encoders 221 and 223 can be located, respectively, along guide 210 to provide an indication of the position of platform 208 and along guide 220 to provide an indication of the position of carriage 216.
Carriage 216 and platform 208 may be actuated by servo motors or stepper motors mounted between one of the guide rails and the respective platform or carriage. Other types of motors, such as linear motors with the magnetic actuating structure built into the guide rails and platforms, may be used. These motors generally perform coarse adjustment of head suspension assembly 100 which is connected to a suspension chuck 242. Suspension chuck 242 may be mounted to fine positioning platform 240. Fine positioning platform 240 is connected to suspension chuck 242 through piezo elements or a voice coil actuator or other mechanism that is able to move suspension chuck 242 in the X direction to perform fine adjustment of a transducing head with respect to disc 106.
During head suspension loading operations, pivot motor 228 rotates eccentric cam 229 causing lever arm 227 and the back end of pivoting platform 226 to rotate upward about pivot pins 236, 238. Suspension chuck 242, which carries suspension 244, is then placed on piezo platform 240 and spindle motor 204 is activated so that disc 206 rotates at a desired speed. Carriage 216 can be moved forward so that the slider 110 (
The head suspension 100 is connected by electrical leads to printed circuit 230, which has further connections to control box 248. Control box 248 controls the positioning of the head suspension 100 and the types of tests that are performed on the slider 110. In particular, control box 248 designates the location for the test track, the data to be written to the disc, and the position of the read head within the written track during read back of the test data. Using fine positioning platform 240, the slider 110 can be moved to a number of different locations within a track during read back, so that a profile of the off track sensitivity of the read element of slider 110 can be determined.
The illustrations of the embodiments described herein are intended to provide a general understanding of the structure of the various embodiments. The illustrations are not intended to serve as a complete description of all of the elements and features of apparatus and systems that utilize the structures or methods described herein. Many other embodiments may be apparent to those of skill in the art upon reviewing the disclosure. Other embodiments may be utilized and derived from the disclosure, such that structural and logical substitutions and changes may be made without departing from the scope of the disclosure. Additionally, the illustrations are merely representational and may not be drawn to scale. Certain proportions within the illustrations may be exaggerated, while other proportions may be reduced. Accordingly, the disclosure and the figures are to be regarded as illustrative rather than restrictive.
One or more embodiments of the disclosure may be referred to herein, individually and/or collectively, by the term “invention” merely for convenience and without intending to limit the scope of this application to any particular invention or inventive concept. Moreover, although specific embodiments have been illustrated and described herein, it should be appreciated that any subsequent arrangement designed to achieve the same or similar purpose may be substituted for the specific embodiments shown. This disclosure is intended to cover any and all subsequent adaptations or variations of various embodiments. Combinations of the above embodiments, and other embodiments not specifically described herein, will be apparent to those of skill in the art upon reviewing the description.
The Abstract of the Disclosure is provided to comply with 37 C.F.R. § 1.72(b) and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. In addition, in the foregoing Detailed Description, various features may be grouped together or described in a single embodiment for the purpose of streamlining the disclosure. This disclosure is not to be interpreted as reflecting an intention that the claimed embodiments require more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter may be directed to less than all of the features of any of the disclosed embodiments.
The above-disclosed subject matter is to be considered illustrative, and not restrictive, and the appended claims are intended to cover all such modifications, enhancements, and other embodiments, which fall within the true spirit and scope of the present disclosure. Thus, to the maximum extent allowed by law, the scope of the present disclosure is to be determined by the broadest permissible interpretation of the following claims and their equivalents, and shall not be restricted or limited by the foregoing detailed description.
Claims
1. A head suspension assembly comprising:
- a load beam assembly;
- a gimbal coupled to the load beam assembly, the gimbal comprising a stopper; and
- a clamp coupled to the gimbal, the clamp configured to releasably secure a slider in the head suspension assembly and configured to urge the slider towards the stopper, the clamp comprising: a plate; an alignment feature in the plate for positioning the slider in the head suspension assembly; first and second side members coupled to the plate, the first and second side members each include a portion that extends downwardly from the plate and a portion that is above the plate; and a connection piece, above the plate, that connects the first and second side members.
2. The head suspension assembly of claim 1 and wherein the alignment feature comprises fiducial holes.
3. The head suspension assembly of claim 1 and further comprising an electrical interconnect configured to couple to the slider when the slider is secured in the head suspension assembly.
4. The head suspension assembly of claim 1 and wherein the electrical interconnect comprises traces coupled to contact pads, and wherein the clamp is configured to urge the slider against the contact pads.
5. The head suspension assembly of claim 4 and wherein the gimbal comprises the stopper that is configured to prevent movement of the contact pads when the slider is urged against the contact pads.
6. The head suspension assembly of claim 5 and wherein the stopper comprises a first finger that is positioned proximate to a first outer contact pad of the contact pads, and wherein the stopper further comprises a second finger positioned proximate to a second outer contact pad of the contact pads.
7. The head suspension assembly of claim 6 and wherein the stopper further comprises a first wing coupled to the first finger and a second wing coupled to the second finger.
8. The head suspension assembly of claim 5 and wherein the stopper comprises a bar positioned proximate to the contact pads, and wherein the bar is configured to prevent movement of the contact pads when the slider is urged against the contact pads.
9. The head suspension assembly of claim 3 and wherein portions of the electrical interconnect are routed over the load beam assembly.
10. (canceled)
11. The head suspension assembly of claim 9 and further comprising reduced thickness regions in portions of the load beam assembly under the electrical interconnect.
12. The head suspension assembly of claim 9 and wherein the load beam assembly includes a first end and a second end that is proximate to the clamp, and wherein the electrical interconnect comprises a tail pad portion that extends beyond the first end of the load beam assembly, and the tail pad portion comprises a plurality of layers comprising:
- an electrically conductive via;
- a first metal layer below the electrically conductive via; and
- a second metal layer below the first metal layer and formed of a different metal than the first metal layer.
13. An apparatus comprising:
- a load beam assembly;
- a gimbal coupled to the load beam assembly, the gimbal comprising a substantially flat portion and a stopper having first and second wings that extend upwardly from the substantially flat portion of the gimbal, the stopper further comprising: a bar between the first and second wings having a different geometry than the first wing or the second wing, the bar having a first end coupled to the first wing and a second end coupled to the second wing; or a first finger coupled to the first wing and a second finger coupled to the second wing, the first and second fingers being between the first and second wings; and
- a clamp coupled to the gimbal, the clamp configured to releasably secure a slider and configured to urge the slider towards the bar or the first and second fingers of the stopper.
14. The apparatus of claim 13 and further comprising an electrical interconnect configured to couple to the slider when the slider is secured in the clamp.
15. The apparatus of claim 14 and wherein the electrical interconnect comprises traces coupled to contact pads, and wherein the clamp is configured to urge the slider against the contact pads.
16. The apparatus of claim 15 and wherein the stopper is configured to prevent movement of the contact pads when the slider is urged against the contact pads.
17. The apparatus of claim 16 and wherein the stopper comprises the first finger that is positioned proximate to a first outer contact pad of the contact pads, and wherein the stopper further comprises the second finger positioned proximate to a second outer contact pad of the contact pads.
18. (canceled)
19. The apparatus of claim 15 and wherein the stopper comprises the bar positioned proximate to the contact pads, and wherein the bar is configured to prevent movement of the contact pads when the slider is urged against the contact pads.
20. A method of making a head suspension assembly comprising:
- providing a load beam assembly;
- coupling a gimbal having a stopper to the load beam assembly;
- coupling a clamp to the gimbal such that a plate of the clamp is attached to the gimbal and located between the gimbal and the load beam assembly, and such that side members of the clamp that extend downwardly from the plate are positioned on left and right sides of the load beam assembly, the clamp being capable of releasably securing a slider in the head suspension assembly and being capable of urging the slider towards the stopper; and
- providing an alignment feature in the clamp for positioning the slider in the head suspension assembly.
21. The method of claim 20 and further comprising providing an electrical interconnect configured to couple to the slider when the slider is secured in the head suspension assembly.
22. The method of claim 21 and further comprising routing portions of the electrical interconnect over the load beam assembly.
Type: Application
Filed: Mar 6, 2018
Publication Date: Sep 12, 2019
Inventor: Sunchai Mata (Nakorn Ratchasima)
Application Number: 15/913,327