Gimbal flexure and electrical interconnect assembly

• US 5,645,735 A
• Filed: 10/31/1995
• Issued: 07/08/1997
• Est. Priority Date: 04/15/1994
• Status: Expired due to Fees

• Current Assignee: Hutchinson Technology Incorporated (TDK Corporation)
• Original Assignee: Hutchinson Technology Incorporated (TDK Corporation)
• Inventors: Boucher, Todd, Bennin, Jeffry S., Lien, Brent D., Gustafson, Gary E., Green, Jeffrey W., Jurgenson, Ryan
• Primary Examiner(s): POWELL, WILLIAM A
• Application Number:
  US08/550,611
• Time in Patent Office: 616 Days
• Field of Search: 216/13, 216/20, 216/17, 216/22, 216/27, 216/33, 29/603
• US Class Current: 216/22
• CPC Class Codes: G11B 5/4826 Mounting, aligning or attachment of the transducer head relative to the arm assembly, e.g. slider holding members, gimbals, adhesive G11B5/484 takes precedence; details of head housings or structures G11B5/10, G11B5/127; adjustment relative to the record carrier G11B5/56
• CPC Class Codes: G11B 5/4833 Structure of the arm assembly, e.g. load beams, flexures, parts of the arm adapted for controlling vertical force on the head G11B5/484 takes precedence
• CPC Class Codes: G11B 5/4853 Constructional details of the electrical connection between head and arm
• CPC Class Codes: G11B 5/486 with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly
• CPC Class Codes: H05K 3/365 by abutting, i.e. without alloying process

Abstract

A method for manufacturing a head suspension including separately manufacturing a load beam and a set of traces. The traces are formed from a sheet of conductive material and include an elongated conductor portion and a gimbal portion. Portions of the traces which are configured to be mounted to the load beam are coated with dielectric before being mounted to the load beam. The gimbal portion of the traces provides both mechanical and electrical connections to the conductor portion.

Claims

1. A method of manufacture for a gimbal flexure and electrical interconnect assembly for attachment to a disk drive suspension assembly which positions a floating head assembly over selected tracks on the surface of a rotating data storage device, wherein said suspension assembly includes a load beam having a first surface and a distal end portion shaped and arranged for supporting a gimbal flexure, the method of manufacture, comprising:

manufacturing a set of traces out of a single layer sheet of spring material, the set of traces including one or more elongated substrateless low-profile conductors, the set of traces having a load beam portion shaped and arranged to extend over and to match the surface topology of at least a section of the first surface of the load beam, and a gimbal portion located at a distal end of the set of traces shaped and arranged as a gimbal flexure means for mechanically coupling with the distal end portion of the load beam, providing gimballing support for the floating head assembly, and electrically coupling to electrical terminals on the head assembly;

coating at least part of the set of traces with a thin dielectric material.

2. The method of manufacture of claim 1, wherein the dielectric coating is sprayed on the set of traces.

3. The method of manufacture of claim 1, further comprising the step of applying an adhesive to selected portions of the set of traces.

4. The method of manufacture of claim 1, wherein the dielectric material also acts as an adhesive.

5. The method of manufacture of claim 1, wherein the set of traces is manufactured of a material with a tensile strength and a yield strength similar to those of the suspension assembly.

6. The method of manufacture of claim 1, wherein the set of traces is photochemically etched out of a planar sheet of beryllium copper.

7. The method of manufacture of claim 1, further comprising the step of simultaneously manufacturing a support brace bracketing the set of conductive traces and including a planar border extending along at least one side of the set of conductive traces, tooling registration holes, and support tabs attaching the set of conductive traces to the planar border.

8. A method of manufacture for a plurality of gimbal flexure and electrical interconnect assemblies, comprising the step of simultaneously applying the method of manufacture of claim 7 to contiguous regions of a larger planar sheet of spring material, whereby a plurality of gimbal flexure and electrical interconnect assemblies are formed alongside each other, separated and supported by shared brace borders.

9. A method of manufacture for a head suspension assembly for positioning a head assembly over a rotating data storage device and for transmitting electrical signals to and from the head assembly, said method of manufacture, comprising the steps of:

providing a head assembly having a slider transducer and a plurality of electrical terminals;

manufacturing a suspension assembly including a load beam having a first surface and a distal end portion shaped and arranged for supporting a gimbal flexure;

manufacturing a set of traces out of a single layer sheet of spring material, the set of traces including one or more pre-shaped elongated substrateless low-profile conductors, the set of traces having a load beam portion shaped and arranged to extend over and to match the surface topology of at least a section of the first surface of the load beam, and a gimbal portion located at a distal end of the set of traces shaped and arranged as a gimbal flexure means for mechanically coupling with the distal end portion of the load beam, providing gimballing support for the floating head assembly, and electrically coupling to the electrical terminals on the head assembly;

coating at least part of the set of traces with a thin dielectric material;

attaching the set of traces to the load beam, forming an interconnect/suspension assembly;

attaching the head assembly to the gimbal portion of the set of traces; and

electrically coupling the gimbal portion of the set of traces to the electrical terminals on the head assembly.