WO1994012974A1 - Plaque de liaison a montage en cardan - Google Patents

Plaque de liaison a montage en cardan Download PDF

Info

Publication number
WO1994012974A1
WO1994012974A1 PCT/US1993/011687 US9311687W WO9412974A1 WO 1994012974 A1 WO1994012974 A1 WO 1994012974A1 US 9311687 W US9311687 W US 9311687W WO 9412974 A1 WO9412974 A1 WO 9412974A1
Authority
WO
WIPO (PCT)
Prior art keywords
suspension
magnetic head
pitch
load beam
bond plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US1993/011687
Other languages
English (en)
Inventor
Richard A. Budde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hutchinson Technology Inc
Original Assignee
Hutchinson Technology Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hutchinson Technology Inc filed Critical Hutchinson Technology Inc
Publication of WO1994012974A1 publication Critical patent/WO1994012974A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4826—Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4833—Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
    • G11B5/4853—Constructional details of the electrical connection between head and arm

Definitions

  • a rotating disk In a magnetic rigid disk storage device, a rotating disk is employed to store information in small magnetized domains strategically located on the disk surface. A large quantity of information can be manipulated in a small physical volume by providing timely and accurate access to these domains for the purposes of recording and retrieving information.
  • Typical construction of rigid disk storage device consists of a frame to provide attachment points and orientation for other components, a spindle capable of producing stable rotation of the rigid disk(s) upon which the information will be stored, a read/write transducer head capable of flying in close proximity to the rigid disk(s) , thus enabling the creation of magnetic domains on the rigid disk, a suspension for orienting the transducer head and providing forces and compliances necessary for proper transducer operation, and an actuator, for positioning the suspension and thus the read/write transducer head or slider.
  • Conventionally available magnetic head gimbal designs for rigid disk drives allow magnetic read/write heads to pitch about a first axis and roll about a second axis orthogonal to the first axis when imperfections in the disk drive assembly tend to place the heads in improper positions relative to the surface of the disk.
  • the present invention is designed to allow significant reductions in the pitch and roll axis stiffness of the head gimbal assembly, thus allowing the head to more readily maintain proper attitude and to provide clearance for movement of the head relative to the load beam.
  • This motion is usually achieved by rotating the actuator and head gimbal assemblies about a common axis.
  • This mode of actuation offers performance advantages in terms of data access time and economy of manufacture.
  • prior art gimbals especially when modified to lower their pitch and roll stiffness, also have reduced stiffness in the lateral direction and greater susceptibility to damage from shock loading.
  • the gimbal design of the present invention overcomes the limitations of the prior art by using an improved separate bond plate to which the read write head or slider is attached prior to attachment to the suspension gimbal.
  • the magnetic head can be attached to the bond plate and functional testing can take place before attachment to the load beam.
  • a separate bond plate can reduce or eliminate damage incurred in other methods of construction where the magnetic head is secured directly to the gimbal.
  • a design using a separate bond plate maximizes the area available for head bonding while maintaining the gimbal width to be not greater than the magnetic head itself.
  • a magnetic head suspension for attachment to an actuator arm, where the head suspension comprises a spring load beam element portion joined to the actuator arm at one end thereof, a bond plate having a surface adapted for being adhesively secured to magnetic head; and a flexure portion attached to said load beam element, said flexure portion having an opening therethrough sized to receive the bond plate therein, said opening having positioned therein at least two torsionally flexible pitch arms, each of which is connected at one end thereof to the surface of the bond plate opposite the one to which the magnetic head is secured and at the other end is secured to the roll arm; and a roll arm aligned with the longitudinal axis of the support assembly.
  • Figure 1 is a perspective view of a suspension assembly with an integrated gimbal portion according to the prior art
  • FIG. 2 is a detail view of the gimbal portion of the prior art suspension shown in Figure
  • Figure 3 is a perspective view of an embodiment of a suspension in accordance with the present invention.
  • Figure 4 is a detail view of the gimbal portion of the suspension shown in Figure 3; and Figures 5a and 5b are detailed views of gimbals of alternative embodiments of the invention. Detailed Description of the Invention
  • the suspension shown in Fig. 1 corresponds to the suspension shown in PCT/US92/10900 filed on December 4, 1992.
  • a conventional load beam 114 is affixed to a base plate 116.
  • An integrated gimbal 113 is affixed to the distal end of the load beam.
  • gimbal 113 of that prior art device consists of a pair of head bonding pads 11 to which a magnetic transducer head 13 may be adhesively secured using a suitable bonding compound, an adhesive or using some other appropriate bonding method.
  • a suitable bonding compound an adhesive or using some other appropriate bonding method.
  • the head is suspended from torsionally flexible arms 12 and bond pad torsional elements 14.
  • a preferred form of the present invention is shown in Fig. 3 through 5 as embodied in a unitary load beam 114 which is in turn a part of a
  • a base plate 116 is located at the proximal end of the load beam and integrated gimbal 113 and bond plate 115. Magnetic transducer head 13 is attached to base plate 116 at the distal end of the load beam.
  • the embodiment shown is one of many possible embodiments of the invention since the invention works with other forms of integrated gimbal and with non-integrated gimbals as well.
  • Fig. 4 shows the gimbal of the present invention in more detail.
  • Bond plate 115 has raised edges 126, or a partially recessed surface 128, so that it is thicker along the edges where attachment is to be made to gimbal pads 11.
  • This provides a recessed central area on the bond pad beneath the gimbal arms 12 and 14 to allow a clearance space 130 for pitch and roll deflection of the head and to provide clearance for routing the electrical conductors 118 between the gimbal arms and the bond plate.
  • This also allows the static attitude of the gimbal 113 to be adjusted relative to the load beam 114 by raising, lowering and realigning the plane of the pitch and roll axis gimbals of the suspension.
  • the electrical conductors 118 are connected to the magnetic head assembly via an electrically conductive junction area 117. This junction area could alternatively be located other places, such as on the bond plate 115, on the gimbal 113, or on the load beam 114.
  • the bond pads are configured to be thicker than gimbal arms 12 and 14 to provide the same clearances with a bond plate 115 having a planar surface.
  • Yet another alternative would be a combination of a slightly recessed routing and clearance surface on bond plate 115 and a cooperating thinning of the gimbal arms 12 and 14 relative to their bond pads to form the clearance space.
  • Fig. 5b has a bond plate with a raised mesa 140 arranged for bonding to a gimbal of the type shown in U.S. Patent 5,198,945 issued March 30, 1993.
  • mesa 140 allows for a clearance space to allow the routing of insulated conductors 142 without interference with the mounting surface or bond pad area 144 of the gimbal and load beam.
  • the clearance space allows for the proper gimballing action of the head as it flies over the surface of the disk is assured by the offset provided by the mesa and the offsets achieved through the forming operations performed on the integrated gimbal along form lines 146 and 147.

Landscapes

  • Supporting Of Heads In Record-Carrier Devices (AREA)

Abstract

Suspension de tête magnétique pour lecteur de disque à mémoire magnétique. La tête magnétique (13) est fixée par collage à une plaque de liaison (115) qui est à son tour fixée comme il convient à un secteur d'un élément souple (113) monté sur la lame d'un ressort (114), cet élément souple (113) étant conçu pour établir une liaison de cardan entre la plaque de liaison (115) et la tête magnétique (13) fixée sur celle-ci, selon un axe de tanguage et un axe de roulis, tandis que la tête défile par rapport à la surface du disque magnétique.
PCT/US1993/011687 1992-12-02 1993-12-02 Plaque de liaison a montage en cardan Ceased WO1994012974A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US98343392A 1992-12-02 1992-12-02
US07/983,433 1992-12-02

Publications (1)

Publication Number Publication Date
WO1994012974A1 true WO1994012974A1 (fr) 1994-06-09

Family

ID=25529946

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/011687 Ceased WO1994012974A1 (fr) 1992-12-02 1993-12-02 Plaque de liaison a montage en cardan

Country Status (1)

Country Link
WO (1) WO1994012974A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5617274A (en) * 1996-01-12 1997-04-01 International Business Machines Corporation Low profile integral flexure for closely packed disks in a disk drive assembly
EP0834865A1 (fr) * 1996-10-04 1998-04-08 International Business Machines Corporation Ensemble de suspension de tête
EP0834866A3 (fr) * 1996-10-03 1998-12-16 Quantum Corporation Lignes de transmission multipiste pour interconnection de tête de lecture/écriture dans une unité à disque
US5930078A (en) * 1996-05-07 1999-07-27 International Business Machines Corporation Automated head wire stringing, termination, and slider bonding suspension assembly with load/unload feature
CN1060281C (zh) * 1994-10-20 2001-01-03 株式会社日立制作所 磁头支承机构
CN1077320C (zh) * 1995-09-13 2002-01-02 阿尔卑斯电气株式会社 磁录放装置中应用的磁头传送机构

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61187110A (ja) * 1985-02-14 1986-08-20 Matsushita Electric Ind Co Ltd 磁気ヘツド
US4633352A (en) * 1981-09-17 1986-12-30 Ye Data Incorporated Magnetic field noise shield for a magnetic head
GB2193833A (en) * 1986-08-12 1988-02-17 Hutchinson Technology Magnetic head arm assembly
JPH03189976A (ja) * 1989-12-19 1991-08-19 Matsushita Electric Ind Co Ltd 磁気ヘッド支持装置
US5198945A (en) * 1990-11-09 1993-03-30 Hutchinson Technology Incorporated Magnetic head suspension
US5282102A (en) * 1992-02-27 1994-01-25 Hutchinson Technology Incorporated Gimbal for magnetic head suspension systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4633352A (en) * 1981-09-17 1986-12-30 Ye Data Incorporated Magnetic field noise shield for a magnetic head
JPS61187110A (ja) * 1985-02-14 1986-08-20 Matsushita Electric Ind Co Ltd 磁気ヘツド
GB2193833A (en) * 1986-08-12 1988-02-17 Hutchinson Technology Magnetic head arm assembly
JPH03189976A (ja) * 1989-12-19 1991-08-19 Matsushita Electric Ind Co Ltd 磁気ヘッド支持装置
US5198945A (en) * 1990-11-09 1993-03-30 Hutchinson Technology Incorporated Magnetic head suspension
US5282102A (en) * 1992-02-27 1994-01-25 Hutchinson Technology Incorporated Gimbal for magnetic head suspension systems

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1060281C (zh) * 1994-10-20 2001-01-03 株式会社日立制作所 磁头支承机构
CN1077320C (zh) * 1995-09-13 2002-01-02 阿尔卑斯电气株式会社 磁录放装置中应用的磁头传送机构
US5617274A (en) * 1996-01-12 1997-04-01 International Business Machines Corporation Low profile integral flexure for closely packed disks in a disk drive assembly
US5930078A (en) * 1996-05-07 1999-07-27 International Business Machines Corporation Automated head wire stringing, termination, and slider bonding suspension assembly with load/unload feature
EP0834866A3 (fr) * 1996-10-03 1998-12-16 Quantum Corporation Lignes de transmission multipiste pour interconnection de tête de lecture/écriture dans une unité à disque
EP0834865A1 (fr) * 1996-10-04 1998-04-08 International Business Machines Corporation Ensemble de suspension de tête
US5956209A (en) * 1996-10-04 1999-09-21 International Business Machines Corporation Integrated suspension flexure having a compliant tip termination platform

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