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公开(公告)号：US20230015787A1
公开(公告)日：2023-01-19
申请号：US17945813
申请日：2022-09-15
发明人： Kuen Chee Ee , Ekaratch Pankaew , Preecha Sudachun
IPC分类号： G11B5/48
摘要： A suspension is described. The suspension includes a base plate and a load beam coupled to the base plate. The base plate includes a distal elongated element and a proximal elongated element. The distal elongated element includes at least one non-straight baseplate edge and the proximal elongated element includes at least one non-straight baseplate edge. The load beam includes a first mounting shelf and a second mounting shelf. The load beam is coupled to the base plate such that the first mounting shelf is exposed adjacent to the distal elongated element, and the second mounting shelf is exposed adjacent to the proximal elongated element. The first and second mounting shelves are configured to receive an actuator, such that an edge of the actuator and the at least one non-straight baseplate edge forms a gap.
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公开(公告)号：US20220262395A1
公开(公告)日：2022-08-18
申请号：US17673683
申请日：2022-02-16
发明人： David Glaess , Kuen Chee Ee
摘要： 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.
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公开(公告)号：US11410693B2
公开(公告)日：2022-08-09
申请号：US15931412
申请日：2020-05-13
发明人： Kuen Chee Ee , Long Zhang , David Glaess
摘要： 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.
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公开(公告)号：US20220165930A1
公开(公告)日：2022-05-26
申请号：US17529134
申请日：2021-11-17
IPC分类号： H01L41/04 , H01L41/047 , H01L41/083 , H01L41/09 , H01L41/187 , G11B5/48
摘要： 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.
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公开(公告)号：US11205449B2
公开(公告)日：2021-12-21
申请号：US16857133
申请日：2020-04-23
发明人： David Glaess , Kuen Chee Ee , Long Zhang , Chris Dunn
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.
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公开(公告)号：US20210390979A1
公开(公告)日：2021-12-16
申请号：US17342297
申请日：2021-06-08
发明人： Kuen Chee Ee , David Glaess
IPC分类号： G11B5/48
摘要： 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.
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公开(公告)号：US20210272592A1
公开(公告)日：2021-09-02
申请号：US17322608
申请日：2021-05-17
发明人： Kuen Chee Ee , Long Zhang , Peter Hahn , David Glaess
IPC分类号： G11B5/48 , G11B5/56 , G11B5/55 , H01L41/25 , H01L41/257 , H01L41/312 , H01L41/293 , H01L41/297
摘要： A multi-layer piezoelectric microactuator assembly has at least one poled and active piezoelectric layer and one poled but inactive piezoelectric layer. The poled but inactive layer acts as a constraining layer in resisting expansion or contract of the first piezoelectric layer thereby reducing or eliminating bending of the assembly as installed in an environment, thereby increasing the effective stroke length of the assembly. Poling only a single layer would induce stresses into the device; hence, polling both piezoelectric layers even though only one layer will be active in use reduces stresses in the device and therefore increases reliability.
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公开(公告)号：US20210249040A1
公开(公告)日：2021-08-12
申请号：US17165749
申请日：2021-02-02
发明人： Peter Hahn , David Glaess , Kuen Chee Ee , Benjapa Tanampee , Keith Allan Vanderlee , Preecha Sudachun , Johnathan Phu
IPC分类号： G11B5/48
摘要： A method of manufacturing a tri-stage assembly is provided. The method includes attaching a first microactuator and a second microactuator to a trace gimbal to a flexure during a PZT on flexure process (POF). The first microactuator is located at a distal end of the flexure and the second microactuator located at a proximal end of the flexure. The method also includes welding the trace gimbal to a baseplate, and a load beam to secure the trace gimbal including the first microactuator and the second microactuator.
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公开(公告)号：US20210241791A1
公开(公告)日：2021-08-05
申请号：US17158955
申请日：2021-01-26
IPC分类号： G11B5/48
摘要： 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.
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10.发明授权公开(公告)号：US11011195B2
公开(公告)日：2021-05-18
申请号：US16357181
申请日：2019-03-18
发明人： Kuen Chee Ee , Long Zhang , Peter Hahn , David Glaess
IPC分类号： G11B5/48 , H01L41/293 , G11B5/56 , G11B5/55 , H01L41/25 , H01L41/257 , H01L41/312 , H01L41/297
摘要： A multi-layer piezoelectric microactuator assembly has at least one poled and active piezoelectric layer and one poled but inactive piezoelectric layer. The poled but inactive layer acts as a constraining layer in resisting expansion or contract of the first piezoelectric layer.
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