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11. 发明申请

US20210082459A1 Multi-Layer PZT Microacuator with Active PZT Constraining Layers for a DSA Suspension 有权
公开(公告)号：US20210082459A1
公开(公告)日：2021-03-18
申请号：US17107729
申请日：2020-11-30
申请人： Magnecomp Corporation
发明人： Peter Hahn , Kuen Chee Ee , Long Zhang
IPC分类号： G11B5/48 , G11B5/596
摘要： 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.

12. 发明授权

US10373636B2 Suspension having a stacked D33 mode PZT actuator with constraint layer 有权
公开(公告)号：US10373636B2
公开(公告)日：2019-08-06
申请号：US15727306
申请日：2017-10-06
申请人： Magnecomp Corporation
发明人： Kuen Chee Ee
IPC分类号： G11B5/48 , G11B5/55 , H01L41/09 , H01L41/047 , H02N2/02
摘要： A microactuator for a dual stage actuated suspension for a hard disk drive is constructed as a longitudinal stack of piezoelectric (PZT) elements acting in the d33 mode, expanding or contracting longitudinally when an electric field is applied across them in the longitudinal direction. The microactuator has interlaced electrode fingers that separate and define the individual PZT elements, and apply the electric field. A stiff constraint layer having a high Young's modulus is affixed to the microactuator on the side opposite the suspension to which the microactuator is bonded. The constraint layer may be a layer of substantially inactive PZT material that is formed integrally with the PZT elements but without electrodes in the inactive PZT layer. The presence of the stiff constraint layer increases the effective stroke length of the microactuator.

13. 发明授权

US10325621B1 Multi-layer PZT microactuator with active PZT constraining layer for a DSA suspension 有权
公开(公告)号：US10325621B1
公开(公告)日：2019-06-18
申请号：US15055618
申请日：2016-02-28
申请人： Magnecomp Corporation
发明人： Peter Hahn , Kuen Chee Ee , Long Zhang
IPC分类号： G11B5/48 , G11B5/596
摘要： 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.

14. 发明授权

US09135936B1 Microactuated suspension with spring bias acting on conductive adhesive bond for improved reliability 有权
标题翻译：具有弹簧偏压的微致动悬挂作用在导电胶粘剂上，以提高可靠性
公开(公告)号：US09135936B1
公开(公告)日：2015-09-15
申请号：US14664846
申请日：2015-03-21
申请人： Magnecomp Corporation
发明人： Peter Hahn , Steve Misuta , Long Zhang , Kuen Chee Ee
IPC分类号： G11B5/48
CPC分类号： G11B5/39 , G11B5/4826 , G11B5/483 , G11B5/4853 , G11B5/4873
摘要： In an electrical connection to a microactuator in a disk drive suspension, an electrical lead is adhered to a microactuator using conductive adhesive and is also mechanically pressed up against the microactuator using a bias mechanism. The bias mechanism may be a spring finger that is welded to the suspension, or it may be a stainless steel finger that is formed integrally with the trace gimbal assembly. The resulting bias force that presses the contact against the microactuator surface reduces the small failure rate that can occur when the conductive adhesive separates from the microactuator's surface as a result of stress such as induced by thermal cycling.
摘要翻译：在与磁盘驱动器悬架中的微致动器的电连接中，电引线使用导电粘合剂粘附到微致动器，并且还使用偏置机构机械地压靠微致动器。偏置机构可以是弹簧手指，其被焊接到悬架上，或者它可以是与跟踪万向节组件一体形成的不锈钢手指。所产生的偏压力压紧微致动器表面的接触减小了当由于热循环引起的应力导致粘合剂与微致动器表面分离时可能发生的小故障率。

15. 发明授权

US09111556B1 Low resistance interface metal for disk drive suspension component grounding 有权
公开(公告)号：US09111556B1
公开(公告)日：2015-08-18
申请号：US14678998
申请日：2015-04-05
申请人： Magnecomp Corporation
发明人： Marcos Lazatin , Brett Holaway
IPC分类号： G11B5/56 , G11B21/24 , G11B5/48
CPC分类号： G11B5/4833 , G11B5/486 , G11B5/4873
摘要： A stainless steel suspension component such as a mount plate is chemically activated by exposure to an activating solution. Gold is then spot plated onto the mount plate in the activated area using an elastomeric mask that is clamped over the mount plate. A component may then be bonded to the gold bond pads. The component may include a PZT microactuator bonded to the gold bond pads using a conductive adhesive such as silver epoxy. The gold acts as an interface metal that provides to a low resistance and environmentally robust ground path for the microactuator.

16. 发明授权

US09105288B1 Formed electrical contact pad for use in a dual stage actuated suspension 有权
标题翻译：形成的电接触垫，用于双级致动悬架
公开(公告)号：US09105288B1
公开(公告)日：2015-08-11
申请号：US14637020
申请日：2015-03-03
申请人： Magnecomp Corporation
发明人： Peter Hahn , Kuen Chee Ee , Long Zhang
IPC分类号： G11B5/48 , H05K3/40
CPC分类号： G11B5/4833 , G11B5/483 , G11B5/4853 , H05K1/189 , H05K3/4007 , H05K2201/10083 , H05K2203/0323
摘要： A flexible electrical circuit such as for use in a hard disk drive dual stage actuated (DSA) suspension has a dimple or other raised feature such as a jog formed in an electrical contact pad. The dimple raises up at least part of the contact pad in height so as to reduce the distance that an electrical bridging component or material such conductive epoxy, solder paste, or jet dispensed solder must traverse in order to complete an electrical connection from the contact pad to an adjacent piezoelectric microactuator or other electrical component for which the electrical circuit carries an electrical signal or electrical power. The reduced distance improves the cleanliness and reliability of the electrical and physical bond, and can allow for electrical connection types that would otherwise be impractical.
摘要翻译：诸如在硬盘驱动器双级致动（DSA）悬架中使用的柔性电路具有凹陷或其它凸起特征，例如形成在电接触焊盘中的点动。凹陷部分使接触垫的至少部分高度升高，以便减小导电环氧树脂，焊膏或喷射分配焊料之间的电气桥接部件或材料必须穿过的距离，以便从接触垫完成电连接到相邻的压电微致动器或电路承载电信号或电功率的其它电气部件。减小的距离提高了电气和物理接合的清洁度和可靠性，并且可以允许否则将不切实际的电连接类型。

17. 发明授权

US08982512B1 Low impedance, high bandwidth disk drive suspension circuit 有权
标题翻译：低阻抗，高带宽磁盘驱动器悬挂电路
公开(公告)号：US08982512B1
公开(公告)日：2015-03-17
申请号：US14037154
申请日：2013-09-25
申请人： Magnecomp Corporation
发明人： Christopher Schreiber , Christopher Gene Dunn
IPC分类号： G11B5/48 , H05K1/02
CPC分类号： G11B5/48 , B33Y80/00 , G11B5/486 , H05K1/0215 , H05K1/0228 , H05K1/056 , H05K3/388 , H05K3/44 , H05K3/4685 , H05K2201/0347 , H05K2201/09554 , H05K2201/09827
摘要： A low impedance, low crosstalk disk drive suspension circuit has multiple traces carrying a first polarity of a differential signal, interleaved with multiple traces carrying the second polarity of a differential signal. Each pair of conductors consisting of a trace of the first polarity and a trace of the second polarity may cross over each other at multiple crossover points. The crossover connections may utilize a second layer of copper trace conductors over the first and main layer, or alternatively the crossover connections may utilize an isolated portion of the suspension substrate.
摘要翻译：低阻抗，低串扰磁盘驱动器悬架电路具有承载差分信号的第一极性的多个迹线，其交错具有携带差分信号的第二极性的多个迹线。由第一极性的迹线和第二极性的迹线组成的每对导体可以在多个交叉点处彼此交叉。交叉连接可以在第一层和主层上利用第二层铜迹线导体，或者交替连接可以利用悬浮基板的隔离部分。

18. 发明授权

US08699186B1 DSA suspension with mid-load beam mounted dual actuators 有权
标题翻译： DSA悬架，带中负载梁安装的双执行器
公开(公告)号：US08699186B1
公开(公告)日：2014-04-15
申请号：US13774630
申请日：2013-02-22
申请人： Magnecomp Corporation
发明人： Peter Hahn , Kuen Chee Ee , Long Zhang
IPC分类号： G11B5/48
CPC分类号： G11B5/4873
摘要： A dual stage microactuated (DSA) suspension has two microactuators which are located approximately mid-load beam, and which are close to the stiffening edge rails of the load beam. A vertically extending C-spring is formed in the rails adjacent the microactuators in order to allow the microactuators to expand and contract.
摘要翻译：双级微致动（DSA）悬架具有两个微致动器，其位于大约中等载荷梁处，并且靠近负载梁的加强边缘轨道。在与微型致动器相邻的导轨中形成垂直延伸的C形弹簧，以允许微型致动器膨胀和收缩。

19. 发明授权

US08570688B1 Electrical connections to a microactuator in a hard disk drive suspension 有权
标题翻译：与硬盘驱动器悬架中的微型致动器的电气连接
公开(公告)号：US08570688B1
公开(公告)日：2013-10-29
申请号：US13287094
申请日：2011-11-01
申请人： Peter Hahn , Kuen Chee Ee
发明人： Peter Hahn , Kuen Chee Ee
IPC分类号： G11B5/55 , G11B21/24
CPC分类号： G11B5/4873 , G11B5/483 , G11B5/486 , H01L2224/40
摘要： In a disk drive suspension circuit, an electrical contact from a flexible circuit to a face of a PZT microactuator is provided by a mechanical bias to press a contact pad of the flexible circuit against the PZT surface. The mechanical bias is provided by a piece of stainless steel that is welded to a nearby point or points on the suspension, and which biases the electrical contact pad carrying the PZT driving voltage against the PZT. The piece of stainless steel may be in the form of a flat piece welded on one or more sides of the contact pad, and may include a dimple for pressing against the contact pad. Additional insulation material may be provided between the dimple and the contact pad to prevent the dimple from penetrating through the flexible circuit's cover layer and shorting the driving voltage.
摘要翻译：在磁盘驱动器悬架电路中，通过机械偏置来提供从柔性电路到PZT微致动器的面的电接触，以将柔性电路的接触垫压靠PZT表面。机械偏置由一块不锈钢提供，焊接到悬架上的附近点或点上，并且偏压带有PZT驱动电压的电接触垫对着PZT。不锈钢片可以是焊接在接触垫的一个或多个侧面上的扁平件的形式，并且可以包括用于压靠接触垫的凹坑。可以在凹坑和接触垫之间提供附加的绝缘材料，以防止凹坑穿透柔性电路的覆盖层并使驱动电压短路。

20. 发明授权

US08498082B1 DSA suspension with improved microactuator stroke length 有权
标题翻译：具有改进的微致动器行程长度的DSA悬架
公开(公告)号：US08498082B1
公开(公告)日：2013-07-30
申请号：US13069812
申请日：2011-03-23
申请人： Jason Padeski , Amaninder Singh Dhillon
发明人： Jason Padeski , Amaninder Singh Dhillon
IPC分类号： G11B21/10
CPC分类号： G11B5/4873
摘要： In a dual stage actuated (DSA) suspension, a PZT microactuator is electrically and mechanically bonded to the rest of the suspension by non-conductive epoxy on the front and rear bottom faces of the PZT, by conductive epoxy that bridges a gap between the top face of the PZT which defines the ground electrode and an adjacent metallic and grounded portion of the suspension, and further by additional non-conductive epoxy that bridges the gap and which at least partly overlies the conductive epoxy. The additional non-conductive epoxy increases the effective stroke length of the PZT.
摘要翻译：在双级致动（DSA）悬架中，PZT微致动器通过非导电环氧树脂在PZT的前后底面上通过导电环氧树脂电连接和机械地结合到悬架的其余部分，导电环氧树脂桥接顶部之间的间隙限定接地电极的PZT的表面和悬浮液的相邻的金属和接地部分，以及桥接间隙并且至少部分覆盖导电环氧树脂的另外的非导电环氧树脂。附加的非导电环氧树脂增加了PZT的有效行程长度。

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