Method of forming a suspension for use in a disk drive having a media disk

• US 7,293,348 B2
• Filed: 03/02/2005
• Issued: 11/13/2007
• Est. Priority Date: 08/24/2001
• Status: Expired due to Fees

• Current Assignee: Western Digital Technologies Incorporated (Western Digital Corporation)
• Original Assignee: Hitachi Global Storage Technologies Netherlands BV (Western Digital Corporation)
• Inventors: Erpelding, A. David
• Primary Examiner(s): Kim; Paul D.
• Application Number:
  US11/070,062
• Publication Number:
  US 20050152068A1
• Time in Patent Office: 986 Days
• Field of Search: 296/030.3, 296/030.4, 296/030.6, 360/244.2, 360/244.3, 360/245.1, 360/245.3, 360/246
• US Class Current: 29/603.04
• 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: Y10T 29/49025 Making disc drive
• CPC Class Codes: Y10T 29/49027 Mounting preformed head/core onto other structure
• CPC Class Codes: Y10T 29/4903 with bonding

Abstract

A suspension for use in a disk drive is disclosed. The suspension has a hinge and load beam which are separately formed and subsequently joined together. The load beam is formed from a material which has improved damping characteristics. The load beam additionally has ribs constructed in order to balance the mass of the suspension about the torsional rotation axis. The location of the torsional rotation axis can be designed to intersect the head gimbal pivot point.

Claims

1. A method of forming a suspension for use in a disk drive having a media disk, the method comprising:

(a) pretreating a load beam with nickel to stiffen the load beam, reduce a weight of the load beam, and match a coefficient of thermal expansion of the load beam relative to conventional stainless steel load beams;

(b) providing the disk drive having the media disk, an actuator for moving a slider relative to the media disk, and a suspension extending from the actuator to the slider, the suspension having a hinge and the load beam that are formed separately and welded together;

(c) forming flanges on the load beam having flange cross-sectional shapes; and

(d) forming ribs on the load beam having rib cross-sectional shapes that differ from the flange cross-sectional shapes, such that the ribs are different in structural form than and spaced apart from the flanges.

2. The method according to claim 1, further comprising forming the flanges and the ribs on outer edges of the load beam.

3. The method according to claim 1, further comprising inverting the flanges and ribs relative to each other such that the flanges are formed toward the media disk and the ribs are formed away from the media disk.

4. The method according to claim 1, further comprising forming ends on at least one of the ribs, and forming a hole in the load beam at at least one of the ends of said at least one of the ribs for stress relief of a material used to form the load beam.

5. The method according to claim 4, further comprising forming a hole at each end of each rib to define a plurality of holes in the load beam.

6. The method according to claim 1, further comprising selecting a material used to form the load beam from the group consisting of metals, plastics, and ceramics.

7. The method according to claim 1, further comprising selecting a material used to form the load beam from the group consisting of magnesium and magnesium rich alloys, and attaching the load beam to the hinge by a method selected from the group consisting of adhesive bonding, diffusion bonding, and welding.

8. The method according to claim 1, further comprising forming the load beam from a constrained layer damping material having two outer sheets of material selected from the group consisting of nickel, beryllium, rhodium, tungsten, and ceramics.

9. The method according to claim 1, further comprising providing the load beam with a head gimbal pivot point and a torsional axis, and aligning the torsional axis with the head gimbal pivot point.

10. The method according to claim 9, wherein the alignment is facilitated by forming the ribs on the load beam to redistribute a mass of the load beam and balance of a total mass of the load beam about the torsional axis.

11. A method of forming a suspension for use in a disk drive having a media disk, the method comprising:

(a) forming a load beam from a constrained layer damping material having two outer sheets of material selected from the group consisting of nickel, beryllium, rhodium, tungsten, and ceramics;

(b) providing the disk drive having the media disk, an actuator for moving a slider relative to the media disk, and a suspension extending from the actuator to the slider, the suspension having a hinge and the load beam that are formed separately and joined together;

(c) forming flanges on the load beam having flange cross-sectional shapes; and

(d) forming ribs on the load beam having rib cross-sectional shapes that differ from the flange cross-sectional shapes, such that the ribs are different in structural form than and spaced apart from the flanges.

12. The method according to claim 11, further comprising forming the flanges and the ribs on outer edges of the load beam.

13. The method according to claim 11, further comprising inverting the flanges and ribs relative to each other such that the flanges are formed toward the media disk and the ribs are formed away from the media disk.

14. The method according to claim 11, further comprising forming ends on at least one of the ribs, and forming a hole in the load beam at at least one of the ends of said at least one of the ribs for stress relief of a material used to form the load beam.

15. The method according to claim 14, further comprising forming a hole at each end of each rib to define a plurality of holes in the load beam.

16. The method according to claim 11, further comprising selecting a material used to form the load beam from the group consisting of metals, plastics, and ceramics.

17. The method according to claim 11, further comprising selecting a material used to form the load beam from the group consisting of magnesium and magnesium rich alloys, and attaching the load beam to the hinge by a method selected from the group consisting of adhesive bonding, diffusion bonding, and welding.

18. The method according to claim 11, further comprising pretreating the load beam with nickel to stiffen the load beam, reduce a weight of the load beam, and match a coefficient of thermal expansion of the load beam relative to conventional stainless steel load beams, and then welding the load beam to the hinge.

19. The method according to claim 11, further comprising providing the load beam with a head gimbal pivot point and a torsional axis, and aligning the torsional axis with the head gimbal pivot point.

20. The method according to claim 19, wherein the alignment is facilitated by forming the ribs on the load beam to redistribute a mass of the load beam and balance of a total mass of the load beam about the torsional axis.