The present disclosure relates to disk drives and suspensions for disk drives. In particular, the invention concerns dual stage actuation (DSA) suspensions.
Dual stage actuation (DSA) disk drive head suspensions and disk drives incorporating DSA suspensions are generally known and commercially available. For example, DSA suspensions having an actuation structure on the baseplate or other mounting portion of the suspension, i.e., proximal to the spring or hinge region of the suspension, are described in the Okawara U.S. Patent Publication No. 2010/0067151, the Shum U.S. Patent Publication No. 2012/0002329, the Fuchino U.S. Patent Publication No. 2011/0242708 and the Imamura U.S. Pat. No. 5,764,444. DSA suspensions having actuation structures located on the loadbeam or gimbal portions of the suspension, i.e., distal to the spring or hinge region, are also known and disclosed, for example, in the Jurgenson U.S. Pat. No. 5,657,188, the Krinke U.S. Pat. No. 7,256,968 and the Yao U.S. Patent Publication No. 2008/0144225. Co-located gimbal-based DSA suspensions are disclosed in co-pending U.S. Provisional Application No. 61/700,972. All of the above-identified patents and patent applications are incorporated herein by reference in their entirety and for all purposes.
There remains a continuing need for improved DSA suspensions. DSA suspensions with enhanced performance capabilities are desired. The suspensions should be capable of being efficiently manufactured.
Various embodiments concern a gimbaled flexure having a dual stage actuation structure comprising flexure comprising a gimbal. The gimbal comprises at least one spring arm and a tongue connected to the at least one spring arm. The dual stage actuation structure further comprises a motor mounted on the gimbal, the motor comprising a top side and a bottom side opposite the top side, the bottom side of the motor facing the flexure. The dual stage actuation structure further comprises a damper located between the motor and the flexure, the damper contacting the tongue and the bottom side of the motor. The damper comprises one or both of elastic and viscoelastic material.
In some of the above embodiments, the damper reduces out-of-plane motion of the tongue during high frequency resonance modes. The contact between the damper and each of the tongue and the bottom side of the motor can maintain a generally parallel planar relationship between the tongue and the motor during activation of the motor.
In some of the above embodiments, the damper is adhered to both of the flexure and the bottom side of the motor. The damper can be located on a stainless steel layer of the flexure.
Some of the above embodiments further comprise a conductive island on the tongue and a void in the damper and a stainless steel layer of the flexure. The void can be a moat that surrounds the conductive island. The moat can minimize wicking of one or both of adhesive and solder from the conductive island.
In some of the above embodiments, the motor comprises two contacts on the bottom side of the motor and the two contacts electrically connect with two traces of the flexure, respectively. An impingement element can be mounted on the top side of the motor. The impingement element can be located and configured to engage with a loadbeam dimple.
Some of the above embodiments comprise further comprise a head slide attached to the tongue. Electrical activation of the motor can move the head slider amount a tracking axis. The head slider can comprise a channel. The motor can extend through the channel and the motor can be free from fixed contact with the head slider.
In some of the above embodiments, the gimbal further comprises a pair of struts, the at least one spring arm comprises a pair of spring arms, the tongue is located between the pair of spring arms and is connected to the pair of spring arms by the pair of struts, the motor is mounted on the pair of spring arms, the tongue comprises a head slider mounting, and electrical activation of the motor bends the pair of struts to move the head slider mounting about a tracking axis.
Further features and modifications of the various embodiments are further discussed herein and shown in the drawings. While multiple embodiments are disclosed, still other embodiments of the present disclosure will become apparent to those skilled in the art from the following detailed description, which shows and describes illustrative embodiments of this disclosure. Accordingly, the drawings and detailed description are to be regarded as illustrative in nature and not restrictive.
1, 16B1, and 16C1 are plan views of the stainless steel side of the flexure shown in
2, 16B2, and 16C2 are plan views of the trace side of the flexure shown in
Flexure 12 includes a gimbal 24 at the distal end of the flexure 12. A DSA structure 14 is located on the gimbal 24, adjacent the distal end of the loadbeam 18. As best shown in
As shown in
As perhaps best shown in
As shown in
The operation of DSA structure 14 can be described with reference to
As shown in
The gimbal 124 includes spring arms 152 and the tongue 133. The base portion 150, the spring arms 152, and the center region 154 are each formed from the stainless steel layer 140. The spring arms 152 extend from the base portion 150. The center region 154, which is a center part of the tongue 133, is connected to the distal ends of the spring arms 152 and is supported between the spring arms 152. Also formed in the stainless steel layer 140 is a pair of struts 153. Each of the struts 153 extends from one of the opposite lateral sides of the center region 154 and has a motor mounting flag or pad 155 on its outer end. As shown, the struts 153 are offset from one another with respect to the longitudinal axis of the flexure 112 or otherwise configured so as to provide for rotational movement of the motor 134 and the head slider 132 mounted thereto about the tracking axis with respect to the center region 154. Each strut 153 comprises a longitudinal axis that extends generally perpendicular with respect to the longitudinal axis of the suspension 110. The longitudinal axes of the struts 153 extend parallel but do not intersect or otherwise overlap with each other when the struts 153 are not stressed (e.g., not bent). The struts 153 can be the only structural linkage between the center region 154 and the pads 155 (e.g., the only part of the stainless steel layer 140 connecting the center region 154 with the pads 155 is the struts 153, a single strut 153 for each pad 155). As shown in
As shown in
The electrical terminals on the motor 134 may be on the same side (e.g., top or bottom) but opposite longitudinal ends of the motor 134. As shown in
The operation of DSA structure 114 can be described with reference to
As shown in
Some, although relatively little, out-of-plane motion of other portions of the gimbal 124 may be produced during the tracking action of DSA structure 114. The linkage provided by the struts 153 accommodates the motion of the motor 134 so the remaining portions of the tongue 133 remain generally aligned with respect to the longitudinal axis of the flexure 112 during this tracking action. For example, the motor 134 and head slider 132 rotate, but the center region 154 (or more broadly the tongue 133) does not rotate or rotates only an insignificant or trivial amount.
Incorporating a DSA structure as part of the gimbal of a suspension, which may require incorporating components that are configured to move with respect to one another as described above, may leave the components of the DSA structure more susceptible to unintended relative movement. Such movement could be out-of-plane movement of components that are not rigidly attached to one another in a co-located DSA embodiment, but may otherwise be rigidly attached to one another in a conventional non-co-located DSA embodiment. Such movement may be vibration of the components. Various embodiments, including those referenced above, can benefit from providing a dampening layer along a tongue, motor, and/or other components of a DSA structure, as further discussed herein in connection with
As shown in
The damper 329 can be formed from elastic or visco-elastic material. Visco-elastic materials can provide enhanced damping benefits. Examples of suitable materials include 3M™ 242 and JDC MP65 materials. These materials typically have a relatively low elastic modulus and therefore have low stiffness. The damper 329 can be formed by various techniques such as jetting or pin contacting the material in liquid form onto the stainless steel layer 340 or other surface of the tongue 333, or by applying a previously formed film of the material onto the stainless steel layer 340 or other surface of the tongue 333. The material of the damper 329 may be adhesive and therefore can adhere to the tongue 333 (e.g., to the stainless steel layer 340) and/or the motor 334 (e.g., to the bottom side of the motor 334). In any case, the material of the damper 329 can contact both the tongue 333 (e.g., the stainless steel layer 340) and the motor 334 (e.g., the bottom side of the motor 334).
Relative motion occurs between the motor 334 and the tongue 333 during activation of the motor 334. The damper 329 can be placed at the center of motion between the tongue 333 and the motor 334. For example, in some embodiments the damper 329 can extend over a center of rotational motion (e.g., a tracking axis) of the tongue 333. The damper 329 can reduce unintended motion (e.g., motion that is not rotation) between the tongue 333 and the motor 334. The damper 329 is placed into shear by the relative movement between the tongue 333 and the motor 334. The damper 329 material changes the shear motion into heat energy, therefore reducing or dampening unintended motion.
The damper 329 can help to keep the motor 334 in a generally parallel planar relationship with the tongue 333 during operation of the DSA structure 314. For example, a first plane aligned with the flat orientation of the motor 334 can remain parallel, or generally parallel, with a second plane aligned with the flat orientation of the tongue 333 during operation of the DSA structure 314 due to the damper 329. The motor 334 and/or the flexure 312 may otherwise be prone to bending out of the planar parallel relationship when the motor 334 is activated and the DSA structure 314 articulates. The damper 329 can stabilize the movement of the motor 334 with respect to the flexure 312 during activation of the motor 334 without rigidly fixing the motor 334 to the flexure 312, such that the motor 334 is allowed some movement with respect to the tongue 333, as needed for articulation of the DSA structure 314, but out of plane movement is reduced or eliminated. Stabilizing the motor 334 with respect to the flexure 312, and thereby reducing out of plane motion, increases the linear stroke of the motor 334 which increases the tracking efficiency of the DSA structure 314. The damper 329 can reduce or eliminate out-of-plane motion of the tongue 333 during high frequency resonance modes, thereby providing lower gain and higher servo bandwidth capabilities for a disk drive into which the flexure 312 is incorporated. Flexure mode bending gains can also be improved. The higher servo bandwidths provided by the DSA structure 314 also allow tracks on the disk surface (not shown) to be placed closer together and thereby provide for higher capacity disk drives. In general, the greater the area directly between the motor 334 and the stainless steel layer 340 that is covered by damper 329, the greater the benefits and advantages such as those described above that can be achieved. Dampers such as that described herein can also be incorporated into other DSA structures in a similar configuration, such as between the flexure and motors in the DSA structures of
In the embodiment shown in
In various embodiments, a dimple of a loadbeam that engages a motor or an element mounted on the motor can be electrically isolated from the terminals of the motor using elastic or visco-elastic materials such as those described above. For example, one or more materials can be provided on the motor to electrically insulate and mechanically protect the motor. Such aspects are further discussed in connection with
As shown, the top side of the motor 734, opposite the bottom side of the motor 734 which faces the tongue 733, includes an impingement element 788. The impingement element 788 comprises multiple layers. A top layer 737 of the impingement element 788 can comprise a layer of metal (e.g., stainless steel), plastic, or other material that is relatively hard to robustly engage a dimple of a loadbeam which impinges on the top layer 737 of the impingement element 788, thereby mechanically protecting the motor 734 from wear from the impinging dimple. The impingement element 788 includes a second layer 739 below the top layer 737. The second layer 739 can be adhered to the top layer 737 and the top side of the motor 734. The second layer 739 can comprise elastic or visco-elastic material. Characteristics and examples of elastic or visco-elastic materials are discussed herein. The second layer 739 can electrically insulate a terminal on the top side of the motor 734 from the top layer 737. Alternatively, the impingement element 788 can be a single layer of one of the materials discussed herein (e.g., metal, plastic, elastic, visco-elastic). It is noted that the top side of the motor 734 can comprise an electrical contact, such as in the case of motor 634. The impingement element 788 can be located on the electrical contact. The impingement element 788 can then provide a layer of insulating material (e.g., the second layer 739) disposed on the electrical contact to insulate the electrical contact from the dimple. An electrical connection can be made to the electrical contact on the top side of the motor 734 by the electrical contact extending from the top side of the motor 734 to another side of the motor (e.g., the bottom side) and an electrical connection being made to the electrical contact on the another side of the motor (e.g., via a bond pad connecting to an electrical contact extending to the bottom side of the motor 734, as discussed herein). In this or other embodiments, a differential motor drive signal can be applied to the motor 734 (e.g., a positive voltage applied to a first terminal of the motor and a negative voltage applied to a second terminal of the motor 734) to increase the stroke capability (e.g., due to the larger voltage difference across the piezoelectric material of the motor 734).
As shown in
The motor 934 is mounted on the flexure 912. Specifically, the lateral ends of the motor 934 are attached to the coverlay 946 on the support regions 958 of the spring arms 952. As shown in
The head slider 932 includes a channel 990. The channel 990 can be a trough in a bottom or top side of the head slider 932 that extends from a first side of the head slider 932 to a second side of the head slider 932 opposite the first side. As shown, the motor 934 extends within the channel 990 while the motor 934 is not coupled to the head slider 932. The length of the motor 934 is greater than that of the head slider 932 such that the motor 934 extends beyond both opposite lateral ends of the head slider 932. The channel 990 can have a width greater than the width of the motor 934 to provide clearance for the motor 934. Specifically, the channel 990 provides clearance that enables the head slider 932 to move with the tongue 933 independently from movement of the motor 934 during actuation of the DSA structure 614. In this way, the motor 934 extends through the channel 990 and the motor 934 is free from fixed contact with the head slider 932. The clearance allows the motor 934 to move within the channel 990 during activation of the motor 934 and tracking of the DSA structure 914. As shown in the side view of
The head slider 932 is mounted on the tongue 933. Specifically, the opposite ends 992 of the head slider 932, on opposite sides of the channel 990, are attached by adhesive to the head slider mountings 947 on the tongue 933. The head slider mountings 947 can be surfaces of the tongue 933, such as surfaces of the coverlay 946, to which the opposite ends 992 of the head slider 932 can be adhered. An advantage of the DSA structure 914 is that the overall height is reduced by incorporating the motor 934 into the channel 990 of the head slider 932. The motor 934 can be electrically activated to bend the struts 956 and move the head slider 932 about a tracking axis, as discussed herein.
Embodiments of the present disclosure can offer important advantages. For example, servo bandwidth can be significantly increased (e.g., from about 3-4 kHz for baseplate or loadbeam based DSA structures to 8 kHz or more for gimbal based DSA structures).
Any of the embodiments presented herein can be modified in view of the features presented in commonly owned U.S. patent application Ser. No. 14/026,427, entitled CO-LOCATED GIMBAL-BASED DUAL STAGE ACTUATION DISK DRIVE SUSPENSIONS, filed Sep. 13, 2013, and U.S. patent application Ser. No. 14/044,238, entitled CO-LOCATED GIMBAL-BASED DUAL STAGE ACTUATION DISK DRIVE SUSPENSIONS WITH MOTOR STIFFENERS, filed Oct. 2, 2013, each of which is incorporated herein by reference in its entirety. Likewise, any of the embodiments presented in such applications can be modified with any of the features of the present disclosure.
While the embodiments shown herein generally have one piezoelectric motor, it is noted that a suspension can include two or more motors. Such motors can be dampened and/or can include any feature as discussed herein. For example, a DSA structure can having two motors mounted on a gimbaled flexure, each motor dampened and/or including any other feature discussed herein. Various embodiments of suspensions having two motors are disclosed in commonly owned U.S. patent application Ser. No. 13/972,137, entitled CO-LOCATED GIMBAL-BASED DUAL STAGE ACTUATION DISK DRIVE SUSPENSIONS WITH OFFSET MOTORS, filed Aug. 21, 2013, which is incorporated herein by reference in its entirety.
Although the present invention has been described with reference to preferred embodiments, those skilled in the art will recognize that changes can be made in form and detail without departing from the spirit and scope of the invention. For example, although described in connection with certain co-located DSA structures, dampeners and associated features described herein can be used in connection with motors on other DSA structures, including other co-located DSA structures.
This application claims the benefit of U.S. Provisional Application Ser. No. 61/711,988 filed on Oct. 10, 2012 and entitled Co-Located Gimbal-Based Dual Stage Actuation Disk Drive Suspensions With Visco-Elastic Dampers, which is incorporated herein by reference for all purposes.
Number | Name | Date | Kind |
---|---|---|---|
3320556 | Schneider | May 1967 | A |
4418239 | Larson et al. | Nov 1983 | A |
4422906 | Kobayashi | Dec 1983 | A |
4659438 | Kuhn et al. | Apr 1987 | A |
5140288 | Grunwell | Aug 1992 | A |
5320272 | Melton et al. | Jun 1994 | A |
5321568 | Hatam-Tabrizi | Jun 1994 | A |
5333085 | Prentice et al. | Jul 1994 | A |
5427848 | Baer et al. | Jun 1995 | A |
5459921 | Hudson et al. | Oct 1995 | A |
5485053 | Baz | Jan 1996 | A |
5491597 | Bennin et al. | Feb 1996 | A |
5521778 | Boutaghou et al. | May 1996 | A |
5598307 | Bennin | Jan 1997 | A |
5608590 | Ziegler et al. | Mar 1997 | A |
5608591 | Klaassen | Mar 1997 | A |
5631786 | Erpelding | May 1997 | A |
5636089 | Jurgenson et al. | Jun 1997 | A |
5657186 | Kudo et al. | Aug 1997 | A |
5657188 | Jurgenson et al. | Aug 1997 | A |
5666241 | Summers | Sep 1997 | A |
5666717 | Matsumoto et al. | Sep 1997 | A |
5694270 | Sone et al. | Dec 1997 | A |
5717547 | Young | Feb 1998 | A |
5734526 | Symons | Mar 1998 | A |
5737152 | Balakrishnan | Apr 1998 | A |
5754368 | Shiraishi et al. | May 1998 | A |
5764444 | Imamura et al. | Jun 1998 | A |
5773889 | Love et al. | Jun 1998 | A |
5790347 | Girard | Aug 1998 | A |
5796552 | Akin, Jr. et al. | Aug 1998 | A |
5805382 | Lee et al. | Sep 1998 | A |
5812344 | Balakrishnan | Sep 1998 | A |
5818662 | Shum | Oct 1998 | A |
5862010 | Simmons et al. | Jan 1999 | A |
5892637 | Brooks, Jr. et al. | Apr 1999 | A |
5898544 | Krinke et al. | Apr 1999 | A |
5914834 | Gustafson | Jun 1999 | A |
5921131 | Stange | Jul 1999 | A |
5924187 | Matz | Jul 1999 | A |
5973882 | Tangren | Oct 1999 | A |
5973884 | Hagen | Oct 1999 | A |
5986853 | Simmons et al. | Nov 1999 | A |
5995328 | Balakrishnan | Nov 1999 | A |
6011671 | Masse et al. | Jan 2000 | A |
6038102 | Balakrishnan et al. | Mar 2000 | A |
6046887 | Uozumi et al. | Apr 2000 | A |
6055132 | Arya et al. | Apr 2000 | A |
6075676 | Hiraoka et al. | Jun 2000 | A |
6078470 | Danielson et al. | Jun 2000 | A |
6108175 | Hawwa et al. | Aug 2000 | A |
6118637 | Wright et al. | Sep 2000 | A |
6144531 | Sawai | Nov 2000 | A |
6146813 | Girard et al. | Nov 2000 | A |
6156982 | Dawson | Dec 2000 | A |
6157522 | Murphy et al. | Dec 2000 | A |
6172853 | Davis et al. | Jan 2001 | B1 |
6195227 | Fan et al. | Feb 2001 | B1 |
6215622 | Ruiz et al. | Apr 2001 | B1 |
6229673 | Shinohara et al. | May 2001 | B1 |
6233124 | Budde et al. | May 2001 | B1 |
6239953 | Mei | May 2001 | B1 |
6246546 | Tangren | Jun 2001 | B1 |
6246552 | Soeno et al. | Jun 2001 | B1 |
6249404 | Doundakov et al. | Jun 2001 | B1 |
6262868 | Arya et al. | Jul 2001 | B1 |
6275358 | Balakrishnan et al. | Aug 2001 | B1 |
6278587 | Mei | Aug 2001 | B1 |
6282062 | Shiraishi | Aug 2001 | B1 |
6295185 | Stefansky | Sep 2001 | B1 |
6297936 | Kant et al. | Oct 2001 | B1 |
6300846 | Brunker | Oct 2001 | B1 |
6307715 | Berding et al. | Oct 2001 | B1 |
6320730 | Stefansky et al. | Nov 2001 | B1 |
6330132 | Honda | Dec 2001 | B1 |
6349017 | Schott | Feb 2002 | B1 |
6376964 | Young et al. | Apr 2002 | B1 |
6396667 | Zhang et al. | May 2002 | B1 |
6399899 | Ohkawa et al. | Jun 2002 | B1 |
6400532 | Mei | Jun 2002 | B1 |
6404594 | Maruyama et al. | Jun 2002 | B1 |
6424500 | Coon et al. | Jul 2002 | B1 |
6445546 | Coon | Sep 2002 | B1 |
6459549 | Tsuchiya et al. | Oct 2002 | B1 |
6490228 | Killam | Dec 2002 | B2 |
6493190 | Coon | Dec 2002 | B1 |
6493192 | Crane et al. | Dec 2002 | B2 |
6539609 | Palmer et al. | Apr 2003 | B2 |
6549376 | Scura et al. | Apr 2003 | B1 |
6549736 | Miyabe et al. | Apr 2003 | B2 |
6563676 | Chew et al. | May 2003 | B1 |
6596184 | Shum et al. | Jul 2003 | B1 |
6597541 | Nishida et al. | Jul 2003 | B2 |
6600631 | Berding et al. | Jul 2003 | B1 |
6621653 | Schirle | Sep 2003 | B1 |
6621658 | Nashif | Sep 2003 | B1 |
6636388 | Stefansky | Oct 2003 | B2 |
6639761 | Boutaghou et al. | Oct 2003 | B1 |
6647621 | Roen et al. | Nov 2003 | B1 |
6661617 | Hipwell, Jr. et al. | Dec 2003 | B1 |
6661618 | Fujiwara et al. | Dec 2003 | B2 |
6704157 | Himes et al. | Mar 2004 | B2 |
6704158 | Hawwa et al. | Mar 2004 | B2 |
6714384 | Himes et al. | Mar 2004 | B2 |
6714385 | Even et al. | Mar 2004 | B1 |
6724580 | Irie et al. | Apr 2004 | B2 |
6728057 | Putnam | Apr 2004 | B2 |
6728077 | Murphy | Apr 2004 | B1 |
6731472 | Okamoto et al. | May 2004 | B2 |
6735052 | Dunn et al. | May 2004 | B2 |
6735055 | Crane et al. | May 2004 | B1 |
6737931 | Amparan et al. | May 2004 | B2 |
6738225 | Summers et al. | May 2004 | B1 |
6741424 | Danielson et al. | May 2004 | B1 |
6751062 | Kasajima et al. | Jun 2004 | B2 |
6760182 | Bement et al. | Jul 2004 | B2 |
6760194 | Shiraishi et al. | Jul 2004 | B2 |
6760196 | Niu et al. | Jul 2004 | B1 |
6762913 | Even et al. | Jul 2004 | B1 |
6765761 | Arya | Jul 2004 | B2 |
6771466 | Kasajima et al. | Aug 2004 | B2 |
6771467 | Kasajima et al. | Aug 2004 | B2 |
6791802 | Watanabe et al. | Sep 2004 | B2 |
6798597 | Aram et al. | Sep 2004 | B1 |
6801402 | Subrahmanyam et al. | Oct 2004 | B1 |
6831539 | Hipwell, Jr. et al. | Dec 2004 | B1 |
6833978 | Shum et al. | Dec 2004 | B2 |
6839204 | Shiraishi et al. | Jan 2005 | B2 |
6841737 | Komatsubara et al. | Jan 2005 | B2 |
6856075 | Houk et al. | Feb 2005 | B1 |
6898042 | Subrahmanyan | May 2005 | B2 |
6900967 | Coon et al. | May 2005 | B1 |
6922305 | Price | Jul 2005 | B2 |
6934127 | Yao et al. | Aug 2005 | B2 |
6942817 | Yagi et al. | Sep 2005 | B2 |
6943991 | Yao et al. | Sep 2005 | B2 |
6950288 | Yao et al. | Sep 2005 | B2 |
6963471 | Arai et al. | Nov 2005 | B2 |
6975488 | Kulangara et al. | Dec 2005 | B1 |
6977790 | Chen et al. | Dec 2005 | B1 |
7006333 | Summers | Feb 2006 | B1 |
7016159 | Bjorstrom et al. | Mar 2006 | B1 |
7020949 | Muramatsu et al. | Apr 2006 | B2 |
7023667 | Shum | Apr 2006 | B2 |
7050267 | Koh et al. | May 2006 | B2 |
7057857 | Niu et al. | Jun 2006 | B1 |
7064928 | Fu et al. | Jun 2006 | B2 |
7079357 | Kulangara et al. | Jul 2006 | B1 |
7082670 | Boismier et al. | Aug 2006 | B2 |
7092215 | Someya et al. | Aug 2006 | B2 |
7130159 | Shimizu et al. | Oct 2006 | B2 |
7132607 | Yoshimi et al. | Nov 2006 | B2 |
7142395 | Swanson et al. | Nov 2006 | B2 |
7144687 | Fujisaki et al. | Dec 2006 | B2 |
7159300 | Yao et al. | Jan 2007 | B2 |
7161767 | Hernandez et al. | Jan 2007 | B2 |
7177119 | Bennin et al. | Feb 2007 | B1 |
7218481 | Bennin et al. | May 2007 | B1 |
7256968 | Krinke | Aug 2007 | B1 |
7271958 | Yoon et al. | Sep 2007 | B2 |
7292413 | Coon | Nov 2007 | B1 |
7307817 | Mei | Dec 2007 | B1 |
7322241 | Kai | Jan 2008 | B2 |
7336436 | Sharma et al. | Feb 2008 | B2 |
7342750 | Yang et al. | Mar 2008 | B2 |
7345851 | Hirano et al. | Mar 2008 | B2 |
7375930 | Yang et al. | May 2008 | B2 |
7379274 | Yao et al. | May 2008 | B2 |
7382582 | Cuevas | Jun 2008 | B1 |
7385788 | Kubota et al. | Jun 2008 | B2 |
7391594 | Fu et al. | Jun 2008 | B2 |
7403357 | Williams | Jul 2008 | B1 |
7408745 | Yao et al. | Aug 2008 | B2 |
7417830 | Kulangara | Aug 2008 | B1 |
7420778 | Sassine et al. | Sep 2008 | B2 |
7459835 | Mei et al. | Dec 2008 | B1 |
7460337 | Mei | Dec 2008 | B1 |
7466520 | White et al. | Dec 2008 | B2 |
7499246 | Nakagawa | Mar 2009 | B2 |
7509859 | Kai | Mar 2009 | B2 |
7518830 | Panchal et al. | Apr 2009 | B1 |
7567410 | Zhang et al. | Jul 2009 | B1 |
7595965 | Kulangara et al. | Sep 2009 | B1 |
7625654 | Vyas et al. | Dec 2009 | B2 |
7643252 | Arai et al. | Jan 2010 | B2 |
7649254 | Graydon et al. | Jan 2010 | B2 |
7663841 | Budde et al. | Feb 2010 | B2 |
7667921 | Satoh et al. | Feb 2010 | B2 |
7675713 | Ogawa et al. | Mar 2010 | B2 |
7688552 | Yao et al. | Mar 2010 | B2 |
7692899 | Arai et al. | Apr 2010 | B2 |
7701673 | Wang et al. | Apr 2010 | B2 |
7701674 | Arai | Apr 2010 | B2 |
7719798 | Yao | May 2010 | B2 |
7724478 | Deguchi et al. | May 2010 | B2 |
7751153 | Kulangara et al. | Jul 2010 | B1 |
7768746 | Yao et al. | Aug 2010 | B2 |
7782572 | Pro | Aug 2010 | B2 |
7821742 | Mei | Oct 2010 | B1 |
7832082 | Hentges et al. | Nov 2010 | B1 |
7835113 | Douglas | Nov 2010 | B1 |
7872344 | Fjelstad et al. | Jan 2011 | B2 |
7875804 | Tronnes et al. | Jan 2011 | B1 |
7914926 | Kimura et al. | Mar 2011 | B2 |
7923644 | Ishii et al. | Apr 2011 | B2 |
7924530 | Chocholaty | Apr 2011 | B1 |
7929252 | Hentges et al. | Apr 2011 | B1 |
7983008 | Liao et al. | Jul 2011 | B2 |
7986494 | Pro | Jul 2011 | B2 |
8004798 | Dunn | Aug 2011 | B1 |
8085508 | Hatch | Dec 2011 | B2 |
8089728 | Yao et al. | Jan 2012 | B2 |
8120878 | Drape et al. | Feb 2012 | B1 |
8125736 | Nojima et al. | Feb 2012 | B2 |
8125741 | Shelor | Feb 2012 | B2 |
8144436 | Iriuchijima et al. | Mar 2012 | B2 |
8149542 | Ando | Apr 2012 | B2 |
8161626 | Ikeji | Apr 2012 | B2 |
8169746 | Rice et al. | May 2012 | B1 |
8174797 | Iriuchijima | May 2012 | B2 |
8189301 | Schreiber | May 2012 | B2 |
8194359 | Yao et al. | Jun 2012 | B2 |
8199441 | Nojima | Jun 2012 | B2 |
8228642 | Hahn et al. | Jul 2012 | B1 |
8248731 | Fuchino | Aug 2012 | B2 |
8248734 | Fuchino | Aug 2012 | B2 |
8248735 | Fujimoto et al. | Aug 2012 | B2 |
8248736 | Hanya et al. | Aug 2012 | B2 |
8254062 | Greminger | Aug 2012 | B2 |
8259416 | Davis et al. | Sep 2012 | B1 |
8264797 | Emley | Sep 2012 | B2 |
8289652 | Zambri et al. | Oct 2012 | B2 |
8295012 | Tian et al. | Oct 2012 | B1 |
8300362 | Virmani et al. | Oct 2012 | B2 |
8310790 | Fanslau, Jr. | Nov 2012 | B1 |
8331061 | Hanya et al. | Dec 2012 | B2 |
8339748 | Shum et al. | Dec 2012 | B2 |
8351160 | Fujimoto | Jan 2013 | B2 |
8363361 | Hanya et al. | Jan 2013 | B2 |
8379349 | Pro et al. | Feb 2013 | B1 |
8446694 | Tian et al. | May 2013 | B1 |
8456780 | Ruiz | Jun 2013 | B1 |
8498082 | Padeski et al. | Jul 2013 | B1 |
8526142 | Dejkoonmak et al. | Sep 2013 | B1 |
8542465 | Liu et al. | Sep 2013 | B2 |
8559137 | Imuta | Oct 2013 | B2 |
8665565 | Pro et al. | Mar 2014 | B2 |
8675314 | Bjorstrom et al. | Mar 2014 | B1 |
20010012181 | Inoue et al. | Aug 2001 | A1 |
20010013993 | Coon | Aug 2001 | A1 |
20010030838 | Takadera et al. | Oct 2001 | A1 |
20010043443 | Okamoto et al. | Nov 2001 | A1 |
20020075606 | Nishida et al. | Jun 2002 | A1 |
20020118492 | Watanabe et al. | Aug 2002 | A1 |
20020149888 | Motonishi et al. | Oct 2002 | A1 |
20030011118 | Kasajima et al. | Jan 2003 | A1 |
20030011936 | Himes et al. | Jan 2003 | A1 |
20030053258 | Dunn et al. | Mar 2003 | A1 |
20030135985 | Yao et al. | Jul 2003 | A1 |
20030174445 | Luo | Sep 2003 | A1 |
20030202293 | Nakamura et al. | Oct 2003 | A1 |
20030210499 | Arya | Nov 2003 | A1 |
20040027727 | Shimizu et al. | Feb 2004 | A1 |
20040027728 | Coffey et al. | Feb 2004 | A1 |
20040070884 | Someya et al. | Apr 2004 | A1 |
20040125508 | Yang et al. | Jul 2004 | A1 |
20040181932 | Yao et al. | Sep 2004 | A1 |
20040207957 | Kasajima et al. | Oct 2004 | A1 |
20050061542 | Aonuma et al. | Mar 2005 | A1 |
20050063097 | Maruyama et al. | Mar 2005 | A1 |
20050105217 | Kwon et al. | May 2005 | A1 |
20050254175 | Swanson et al. | Nov 2005 | A1 |
20050280944 | Yang et al. | Dec 2005 | A1 |
20060044698 | Hirano et al. | Mar 2006 | A1 |
20060077594 | White et al. | Apr 2006 | A1 |
20060181812 | Kwon et al. | Aug 2006 | A1 |
20060193086 | Zhu et al. | Aug 2006 | A1 |
20060209465 | Takikawa et al. | Sep 2006 | A1 |
20060238924 | Gatzen | Oct 2006 | A1 |
20060274452 | Arya | Dec 2006 | A1 |
20060274453 | Arya | Dec 2006 | A1 |
20060279880 | Boutaghou et al. | Dec 2006 | A1 |
20070133128 | Arai | Jun 2007 | A1 |
20070153430 | Park et al. | Jul 2007 | A1 |
20070223146 | Yao et al. | Sep 2007 | A1 |
20070227769 | Brodsky et al. | Oct 2007 | A1 |
20070253176 | Ishii et al. | Nov 2007 | A1 |
20080084638 | Bonin | Apr 2008 | A1 |
20080144225 | Yao et al. | Jun 2008 | A1 |
20080192384 | Danielson et al. | Aug 2008 | A1 |
20080198511 | Hirano et al. | Aug 2008 | A1 |
20080273266 | Pro | Nov 2008 | A1 |
20080273269 | Pro | Nov 2008 | A1 |
20090080117 | Shimizu et al. | Mar 2009 | A1 |
20090135523 | Nishiyama et al. | May 2009 | A1 |
20090147407 | Huang et al. | Jun 2009 | A1 |
20090176120 | Wang | Jul 2009 | A1 |
20090190263 | Miura et al. | Jul 2009 | A1 |
20090244786 | Hatch | Oct 2009 | A1 |
20090294740 | Kurtz et al. | Dec 2009 | A1 |
20100067151 | Okaware et al. | Mar 2010 | A1 |
20100073825 | Okawara | Mar 2010 | A1 |
20100097726 | Greminger et al. | Apr 2010 | A1 |
20100143743 | Yamasaki et al. | Jun 2010 | A1 |
20100165515 | Ando | Jul 2010 | A1 |
20100165516 | Fuchino | Jul 2010 | A1 |
20100177445 | Fuchino | Jul 2010 | A1 |
20100195252 | Kashima | Aug 2010 | A1 |
20100208390 | Hanya et al. | Aug 2010 | A1 |
20100220414 | Klarqvist et al. | Sep 2010 | A1 |
20100246071 | Nojima et al. | Sep 2010 | A1 |
20100271735 | Schreiber | Oct 2010 | A1 |
20100290158 | Hanya et al. | Nov 2010 | A1 |
20110013319 | Soga et al. | Jan 2011 | A1 |
20110058282 | Fujimoto et al. | Mar 2011 | A1 |
20110096438 | Takada et al. | Apr 2011 | A1 |
20110123145 | Nishio | May 2011 | A1 |
20110141624 | Fuchino et al. | Jun 2011 | A1 |
20110228425 | Liu et al. | Sep 2011 | A1 |
20110242708 | Fuchino | Oct 2011 | A1 |
20110279929 | Kin | Nov 2011 | A1 |
20110299197 | Eguchi | Dec 2011 | A1 |
20120002329 | Shum et al. | Jan 2012 | A1 |
20120113547 | Sugimoto | May 2012 | A1 |
20120281316 | Fujimoto et al. | Nov 2012 | A1 |
20130242434 | Bjorstrom et al. | Sep 2013 | A1 |
20130242436 | Yonekura et al. | Sep 2013 | A1 |
20130265674 | Fanslau | Oct 2013 | A1 |
20140022670 | Takikawa et al. | Jan 2014 | A1 |
20140022671 | Takikawa et al. | Jan 2014 | A1 |
20140022674 | Takikawa et al. | Jan 2014 | A1 |
20140022675 | Hanya et al. | Jan 2014 | A1 |
20140063660 | Bjorstrom et al. | Mar 2014 | A1 |
20140078621 | Miller et al. | Mar 2014 | A1 |
Number | Date | Country |
---|---|---|
0591954 | Apr 1994 | EP |
0834867 | May 2007 | EP |
9198825 | Jul 1997 | JP |
10003632 | Jan 1998 | JP |
2001057039 | Feb 2001 | JP |
2001202731 | Jul 2001 | JP |
2001307442 | Nov 2001 | JP |
2002050140 | Feb 2002 | JP |
2002170607 | Jun 2002 | JP |
2003223771 | Aug 2003 | JP |
2004039056 | Feb 2004 | JP |
2004300489 | Oct 2004 | JP |
2005209336 | Aug 2005 | JP |
WO9820485 | May 1998 | WO |
Entry |
---|
U.S. Appl. No. 13/955,204 entitled Damped Dual Stage Actuation Disk Drive Suspensions, filed Jul. 31, 2013. |
U.S. Appl. No. 13/972,137 entitled Co-Located Gimbal-Based Dual Stage Actuation Disk Drive Suspensions With Offset Motors, filed Aug. 21, 2013. |
U.S. Appl. No. 14/026,427 entitled Co-Located Gimbal-Based Dual Stage Actuation Disk Drive Suspensions, filed Sep. 13, 2013. |
U.S. Appl. No. 14/044,238 entitled Co-Located Gimbal-Based Dual Stage Actuation Disk Drive Suspensions With Motor Stifeners, filed Oct. 2, 2013. |
U.S. Appl. No. 13/365,443 entitled Elongated Trace Tethers for Disk Drive Head Suspension Flexures, filed Feb. 3, 2012. |
U.S. Appl. No. 14/141,617 entitled Disk Drive Suspension Assembly Having a Partially Flangeless Load Point Dimple, filed Dec. 27, 2013, 53 pages. |
U.S. Appl. No. 14/145,515 entitled Balanced Co-Located Gimbal-Based Dual Stage Actuation Disk Drive Suspensions, filed Dec. 31, 2013, 39 pages. |
U.S. Appl. No. 13/690,883 entitled Microstructure Patterned Surfaces for Integrated Lead Head Suspensions, filed Nov. 30, 2012. |
U.S. Appl. No. 14/056,481 entitled Two-Motor Co-Located Gimbal-Based Dual Stage Actuation Disk Drive Suspensions With Motor Stiffeners, filed Oct. 17, 2013. |
U.S. Appl. No. 14/103,955 entitled Electrical Contacts to Motors in Dual Stage Actuated Suspensions, filed Dec. 12, 2013. |
International Search Report and Written Opinion issued in PCT/US2013/031484, mailed May 30, 2013, 13 pages. |
U.S. Appl. No. 13/827,622 entitled Mid-Loadbeam Dual Stage Actuated (DSA) Disk Drive Head Suspension, filed Mar. 14, 2013. |
International Search Report and Written Opinion issued in PCT/US2013/059702, dated Mar. 28, 2014, 9 pages. |
Cheng, Yang-Tse, “Vapor deposited thin gold coatings for high temperature electrical contacts”, Electrical Contacts, 1996, Joint with the 18th International Conference on Electrical Contacts, Proceedings of the Forty-Second IEEE Holm Conference, Sep. 16-20, 1996 (abstract only). |
Fu, Yao, “Design of a Hybrid Magnetic and Piezoelectric Polymer Microactuator”, a thesis submitted to Industrial Research Institute Swinburne (IRIS), Swinburne University of Technology, Hawthorn, Victoria , Australia, Dec. 2005. |
Harris, N.R. et al., “A Multilayer Thick-film PZT Actuator for MEMs Applications”, Sensors and Actuators A: Physical, vol. 132, No. 1, Nov. 8, 2006, pp. 311-316. |
International Search Report and Written Opinion issued in PCT/US2013/064314, dated Apr. 18, 2014, 10 pages. |
Jing, Yang, “Fabrication of piezoelectric ceramic micro-actuator and its reliability for hard disk drives”, Ultrasonics, Ferroelectrics and Frequency Control, IEEE, vol. 51, No. 11, Nov. 2004, pp. 1470-1476 (abstract only). |
Kon, Stanley et al., “Piezoresistive and Piezoelectric MEMS Strain Sensors for Vibration Detection”, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2007, Proc. Of SPIE vol. 6529. |
Lengert, David et al., “Design of suspension-based and collocated dual stage actuated suspensions”, Microsyst Technol (2012) 18:1615-1622. |
Li, Longqiu et al., “An experimental study of the dimple-gimbal interface in a hard disk drive”, Microsyst Technol (2011) 17:863-868. |
Pichonat, Tristan et al., “Recent developments in MEMS-based miniature fuel cells”, Microsyst Technol (2007) 13:1671-1678. |
Raeymaekers, B. et al., “Investigation of fretting wear at the dimple/gimbal interface in a hard disk drive suspension”, Wear, vol. 268, Issues 11-12, May 12, 2010, pp. 1347-1353. |
Raeymaekers, Bart et al., “Fretting Wear Between a Hollow Sphere and Flat Surface”, Proceedings of the STLE/ASME International Joint Tribology Conference, Oct. 19-21, 2009, Memphis, TN USA, 4 pages. |
Rajagopal, Indira et al., “Gold Plating of Critical Components for Space Applications: Challenges and Solutions”, Gold Bull., 1992, 25(2), pp. 55-66. |
U.S. Appl. No. 14/216,288 to Miller, Mark A. et al., entitled Co-Located Gimbal-Based Dual Stage Actuation Disk Drive Suspension, filed Mar. 17, 2014, 84 pages. |
U.S. Appl. No. 61/396,239 entitled Low Resistance Ground Joints for Dual Stage Actuation Disk Drive Suspensions, filed May 24, 2010, 16 pages. |
U.S. Appl. No. 13/955,204, to Bjorstrom, Jacob D. et al., Non-Final Office Action issued on Mar. 24, 2014, 7 pages. |
U.S. Appl. No. 13/955,204, to Bjorstrom, Jacob D. et al., Non-Final Office Action issued on Oct. 29, 2013, 9 pages. |
U.S. Appl. No. 13/955,204, to Bjorstrom, Jacob D. et al., Notice of Allowance issued on Jan. 7, 2014, 6 pages. |
U.S. Appl. No. 13/955,204, to Bjorstrom, Jacob D. et al., Notice of Allowance issued on May 6, 2014, 5 pages. |
U.S. Appl. No. 13/955,204, to Bjorstrom, Jacob D. et al., Response filed Apr. 18, 2014 to Non-Final Office Action issued on Mar. 24, 2014, 9 pages. |
U.S. Appl. No. 13/955,204, to Bjorstrom, Jacob D. et al., Response filed Nov. 19, 2013 to Non-Final Office Action issued on Oct. 29, 2013, 11 pages. |
U.S. Appl. No. 13/972,137, to Bjorstrom, Jacob D. et al., Non-Final Office Action issued Nov. 5, 2013. |
U.S. Appl. No. 13/972,137, to Bjorstrom, Jacob D. et al., Notice of Allowance issued on Jan. 17, 2014, 5 pages. |
U.S. Appl. No. 13/972,137, to Bjorstrom, Jacob D. et al., Response filed Dec. 2, 2013 to Non-Final Office Action issued Nov. 5, 2013, 12 pages. |
U.S. Appl. No. 14/044,238 to Miller, Mark A., Non-Final Office Action issued on Feb. 6, 2014, 9 pages. |
U.S. Appl. No. 14/044,238, to Miller, Mark A., Response filed Apr. 22, 2014 to Non-Final Office Action issued on Feb. 6, 2014, 11 pages. |
U.S. Appl. No. 14/050,660, to Miller, Mark A. et al., Non-Final Office Action issued on Mar. 31, 2014, 9 pages. |
Yoon, Wonseok et al., “Evaluation of coated metallic bipolar plates for polymer electrolyte membrane fuel cells”, The Journal of Power Sources, vol. 179, No. 1, Apr. 15, 2008, pp. 265-273. |
International Search Report and Written Opinion issued in PCT/US2013/052885, mailed Feb. 7, 2014, 13 pages. |
Number | Date | Country | |
---|---|---|---|
20140098440 A1 | Apr 2014 | US |
Number | Date | Country | |
---|---|---|---|
61711988 | Oct 2012 | US |