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公开(公告)号：US20230368813A1
公开(公告)日：2023-11-16
申请号：US18195225
申请日：2023-05-09
发明人： Kuen Chee Ee , David Glaess , Harlan Kragt
IPC分类号： G11B5/48
CPC分类号： G11B5/4813
摘要： A suspension assembly includes a baseplate having an upper surface and a lower surface opposite the upper surface, a load beam mounted to the baseplate, a cylindrical hub extending from the upper surface, wherein the cylindrical hub comprises an inner surface that defines a swage hole extending through the baseplate, and a plurality of dimples protruding from the upper surface of the baseplate, wherein each of the dimples includes a rounded side protruding from the upper surface of the baseplate and terminating in an apex. The apexes of the dimples define a contact plane for engaging with the lower surface of the actuator arm swaged to the cylindrical hub.
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公开(公告)号：US20210399653A1
公开(公告)日：2021-12-23
申请号：US17464248
申请日：2021-09-01
发明人： Kuen Chee Ee , Peter Hahn , David Glaess , Keith A. Vanderlee
IPC分类号： H02N2/00 , H01L41/047 , G11B5/48 , H02N2/06 , H02N2/02
摘要： An electrical connection structure for connecting a piezoelectric element and an electrical circuit to each other with a conductive adhesive is described. The electrical connection structure includes an epoxy, a conductive component surrounded by the epoxy, and a trace feature implemented on top of the electrical connection structure.
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公开(公告)号：US10789978B2
公开(公告)日：2020-09-29
申请号：US16119325
申请日：2018-08-31
发明人： Kuen Chee Ee , Long Zhang , David Glaess
摘要： A dual stage actuated suspension has a first piezoelectric microactuator on the trace gimbal assembly (TGA), and a pseudo feature located laterally opposite the microactuator. The pseudo feature is formed integrally with the TGA from at least one of the base metal layer, the insulative layer, and the conductive layer that make up the TGA. The pseudo feature helps to balance the suspension. The suspension can optionally have a second microactuator located proximal of the first microactuator in order to perform coarser positioning than the first microactuator, such that the suspension is a tri-stage actuated suspension.
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公开(公告)号：US20200091404A1
公开(公告)日：2020-03-19
申请号：US16565060
申请日：2019-09-09
发明人： Long Zhang , Kuen Chee Ee , David Glaess , Peter Hahn , Johnathan Phu
IPC分类号： H01L41/09 , H01L41/083 , H01L41/047 , G11B5/48
摘要： A piezoelectric actuator assembly is described. The assembly including a first layer including a top and a bottom surfaces. The assembly including a second layer having a top and a bottom surfaces, the bottom surface of the second layer is disposed over the top surface of the first layer. The assembly including a third layer having a top and a bottom surfaces, the bottom surface of the third layer is disposed over the top surface of the second layer. The assembly includes a first electrode, a second electrode, a third electrode, and a fourth electrode. The third electrode is configured to be shorter than the second electrode such that the active PZT length of the second layer and the third layer is shorter than the active PZT length of the first layer.
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公开(公告)号：US10236022B2
公开(公告)日：2019-03-19
申请号：US15682299
申请日：2017-08-21
发明人： Kuen Chee Ee , Long Zhang , Peter Hahn , David Glaess
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：US09741376B1
公开(公告)日：2017-08-22
申请号：US15227780
申请日：2016-08-03
发明人： Kuen Chee Ee , Long Zhang , Peter Hahn , David Glaess
CPC分类号： G11B5/483 , G11B5/4873 , G11B5/5552 , G11B5/56
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：US11915721B2
公开(公告)日：2024-02-27
申请号：US18111402
申请日：2023-02-17
发明人： Kuen Chee Ee , Long Zhang , David Glaess
CPC分类号： G11B21/025 , G11B21/16
摘要： A hard disk drive (HDD) includes a suspension connected to a stack arm. The suspension includes a mount plate, a hinge, a load beam, and a circuit. The mount plate includes a bottom surface facing a disk and an ear portion extending from a side edge of the mount plate. The bottom surface includes a planar region, a first indented region vertically recessed relative to the planar region, and a second indented region located at the ear portion and vertically recessed relative to the planar region. The load beam terminates in a load beam hinge is connected to the first indented region. The circuit extends along the first and second indented regions.
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公开(公告)号：US11900974B2
公开(公告)日：2024-02-13
申请号：US17883208
申请日：2022-08-08
发明人： Treesoon Kotchaplayuk , Johnathan Hy-tho Phu , Kuen Chee Ee , David Glaess , Rakkiet Warinsirirux
IPC分类号： G11B5/48
CPC分类号： G11B5/4853 , G11B5/4833
摘要： A flexure is described, which includes conductive traces extending from a proximal end of the flexure to a distal end of the flexure. The flexure also includes a plurality of outer gimbal struts configured to define an opening at the proximal end of the flexure. The flexure also includes an oblong feature extending into the opening, the oblong feature defines an aperture. The conductive traces include a first semi-circular conductive trace portion overlapping a first section of the oblong feature at a proximal end of the aperture extending to a distal end of the aperture. The conductive traces include a second semi-circular conductive trace portion overlapping a second section of the oblong feature at a proximal end of the aperture extending to the distal end of the aperture. The first and second semi-circular conductive trace portions define the aperture.
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公开(公告)号：US11769524B2
公开(公告)日：2023-09-26
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 , H10N30/03 , H10N30/045 , H10N30/063 , H10N30/067 , H10N30/072
CPC分类号： G11B5/483 , G11B5/4873 , G11B5/5552 , G11B5/56 , H10N30/03 , H10N30/045 , H10N30/063 , H10N30/067 , H10N30/072 , Y10T29/42
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：US20230282229A1
公开(公告)日：2023-09-07
申请号：US18196919
申请日：2023-05-12
发明人： David Glaess , Kuen Chee Ee
CPC分类号： G11B5/4826 , G11B5/4833 , G11B5/53
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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