Co-located gimbal-based dual stage actuation disk drive head suspension with non-parallel motors

Patent metadata

Field	Value
Publication number	US-10373634-B2
Application number	US-201715638305-A
Country	US
Kind code	B2
Filing date	Jun 29, 2017
Priority date	Jun 30, 2016
Publication date	Aug 6, 2019
Grant date	Aug 6, 2019

Abstract

Embodiments of disk drive head suspensions are described that include a spring metal layer. The spring metal layer includes a base region, support arms extending from the base region, and a slider mounting region. The slider mounting region includes a proximal portion, a distal portion, and a pair of motor openings. The motor openings are configured to receive motors such that the longitudinal axes of the motors are non-parallel with the longitudinal axis of the slider mounting region. The suspensions include traces that include a base portion on the base region of the spring metal layer, a spring metal-unsupported portion extending from the base region to the slider mounting region, and a slider mounting portion extending from the spring metal-unsupported portion onto the slider mounting region. And, the suspensions include an insulating layer between portions of the spring metal layer and the conductor layer.

First claim

What is claimed is:

1. A co-located, dual stage actuation disk drive head suspension flexure, comprising:
a spring metal layer including:
a base region having a central longitudinal flexure axis;
laterally-spaced support arms extending distally from the base region;
a slider mounting region having a longitudinal axis that is parallel with the central longitudinal flexure axis, including:
a proximal portion;
a distal portion;
a middle portion between the proximal and distal portions;
a load point location on the middle portion; and
a pair of laterally spaced motor openings between the proximal and distal portions defined by edges in the spring metal layer, each motor opening on a side of the load point location opposite the other, and wherein the motor openings are configured to receive motors having longitudinal axes that are non-parallel with the longitudinal axis of the slider mounting region; and

linkage members coupling the proximal portion of the slider mounting region to the support arms;
a motor island in each motor opening, and wherein a first motor trace terminates at a first terminal pad on each motor island, and the first terminal pad is configured to be coupled to the motor;

a conductor layer including at least two groups of traces, each group of traces including:
a base portion on the base region of the spring metal layer, on a side of the flexure axis opposite the other base portion;
a spring metal-unsupported portion extending from the base region of the spring metal layer to the slider mounting region, on a side of the flexure axis opposite the other spring metal-unsupported portion; and
a slider mounting portion extending from the spring metal-unsupported portion onto the slider mounting region, wherein:
one or more of the traces on the slider mounting region each terminate at a terminal pad on the slider mounting region; and

an insulating layer between portions of the spring metal layer and the conductor layer.

2. The flexure of claim 1 and further including a slider mounted to the slider mounting region on at least portions of the slider mounting portions of the traces.

3. The flexure of claim 1 and further including a pair of motors, each having a longitudinal axis and coupled between the proximal and distal portions of the slider mounting region across one of the motor openings of the slider mounting region, wherein the longitudinal axes of the motors are non-parallel with the longitudinal axis of the slider mounting region.

4. The flexure of claim 3 , wherein a distance between distal ends of the motors coupled to the distal portion of the slider mounting region is greater than a distance between proximal ends of the motors coupled to the proximal portion of the slider mounting region.

5. The flexure of claim 4 , wherein at least twenty five percent of a length of each motor is located on a proximal side of the load point location and on a distal side of the load point location.

6. The flexure of claim 1 and further including a load beam mounted to the flexure, wherein the load beam includes motor openings at least as large as the motor openings of the flexure and the motors, and the motor openings of the load beam are at locations corresponding to the locations of the motor openings of the flexure and the motors.

7. The flexure of claim 1 wherein a second motor trace terminates at a second terminal pad in each motor opening, and the second terminal pad is configured to be coupled to the motor.

8. The flexure of claim 7 , wherein the second terminal pad is unsupported by the spring metal layer, and the insulating layer is on the second terminal pad.

9. The flexure of claim 1 wherein the spring metal layer further includes an end portion coupled to the support arms and extending distally around the slider mounting region.

10. The flexure of claim 9 and further including one or more polymer tethers extending from the end portion to the linkage members.

11. The flexure of claim 10 wherein the polymer tethers are serpentine in shape.

12. The flexure of claim 10 wherein the polymer tethers are part of a cover coat layer of polymer.

13. The flexure of claim 1 and further including one or more polymer tethers extending from an end portion to the motor islands.

14. The flexure of claim 1 , wherein the traces of the slider mounting portion are at an angle between eighty degrees and one-hundred degrees with respect to the longitudinal axes of the motor openings or motors.

15. The flexure of claim 14 , wherein the angle is ninety degrees.

16. The flexure of claim 1 , wherein an angle between the axis of the slider mounting region and the longitudinal axes of the motors is five-forty degrees.

17. The flexure of claim 1 , wherein the spring metal-unsupported portion includes linear portions defining an interior angle.

18. The flexure of claim 17 , wherein at least some or all of any non-linear portions define the interior angle that is greater than one-hundred and thirty five degrees.

19. The flexure of claim 17 , wherein at least some or all of any non-linear portions define the interior angle that is greater than one-hundred and sixty degrees.

20. The flexure of claim 1 , wherein one or more of the traces on the slider mounting region extend onto the middle portion of the slider mounting region.

21. The flexure of claim 20 , wherein one or more of the traces on the slider mounting region extend onto the middle portion of the slider mounting region and terminate at a terminal pad on the distal portion of the slider mounting region.

22. The flexure of claim 1 , wherein at least one of the traces is a motor power trace that terminates at a terminal pad configured to be coupled to the motor at the distal portion of the slider mounting region.

23. The flexure of claim 1 , wherein at least one of the traces is a ground trace that terminates at a terminal pad configured to be coupled to the motor at the proximal portion of the slider mounting region.

24. The flexure of claim 1 , wherein a portion of the insulating layer is on at least portions of the spring metal-unsupported portions of the conductor layer.

25. The flexure of claim 1 , wherein the motor islands and first terminal pads are adjacent the distal portion of the slider mounting region.

26. The flexure of claim 25 , wherein conductive adhesive mechanically and electrically couples the motor to the first terminal pad.

Assignees

• Hutchinson Technology

Inventors

• Pokornowski Zachary A
• Ruzicka Ryan N
• Bjorstrom Jacob D

Classifications

• G11B5/4873

  the arm comprising piezoelectric or other actuators for adjustment of the arm · CPC title

• G11B5/483 Primary

  Piezoelectric devices between head and arm, e.g. for fine adjustment · CPC title

• G11B5/5552

  using fine positioning means for track acquisition separate from the coarse (e.g. track changing) positioning means · CPC title

• G11B5/486

  with provision for mounting or arranging electrical conducting means or circuits on or along the arm assembly · CPC title

• G11B5/4853

  Constructional details of the electrical connection between head and arm · CPC title