Suspension damping

Patent metadata

Field	Value
Publication number	US-12002497-B2
Application number	US-202117158955-A
Country	US
Kind code	B2
Filing date	Jan 26, 2021
Priority date	Jan 31, 2020
Publication date	Jun 4, 2024
Grant date	Jun 4, 2024

Abstract

A dielectric layer configured to overlay a spring metal layer in a suspension assembly is described. The dielectric layer includes a tongue portion including a proximate end and a distal end, trace portions extending from the tongue portion, and an aperture aligned with the void and defined by the tongue portion. The aperture includes an elongated opening with opposing ends partially aligning with the central opening of the void. The aperture further includes slits extending from the opposing ends of the elongated opening and at least partially aligned with slits of the void in the spring metal layer.

First claim

What is claimed is:

1. A suspension comprising:
a flexure including a gimbal, a proximal end, and a distal end, the flexure having a longitudinal axis extending from the proximal end to the distal end, the gimbal includes a spring metal layer having a base portion, a tongue, and a pair of spring arms extending from the base portion to the tongue, a dielectric layer overlaying the spring metal layer and a conductive metal layer overlying the dielectric layer, the conductive metal layer including a first plurality of traces extending from the base portion to the tongue and a second plurality of traces extending from the base portion to the tongue;
a void formed in the spring metal layer between the tongue and the base portion and partially surrounding the tongue, the void includes a central opening with opposing ends, first and second channels extending from the opposing ends of the central opening, a portion of the first plurality of traces and a portion of the second plurality of traces are coupled over the void between the tongue and the base portion and extend towards the tongue, wherein the dielectric layer includes a tongue portion, trace portions, and an aperture aligned with the void and defined by the tongue portion and the trace portions,
the tongue portion includes a proximate end and a distal end, the trace portions extending from the distal end of the tongue portion, and
the aperture includes an elongated opening with opposing ends partially aligning with the central opening of the void, a first slit and a second slit extending from the opposing ends of the elongated opening, and
the first plurality of traces and the second plurality of traces extend from the base portion and converge toward one another over the void, and wherein the first plurality of traces and the second plurality of traces are coupled via a bridge.

2. The suspension of claim 1 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 40% of a length between the proximate end and the distal end of the tongue portion.

3. The suspension of claim 1 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 25% of a length between the proximate end and the distal end of the tongue portion.

4. The suspension of claim 1 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 80% of a length between the proximate end and the distal end of the tongue portion.

5. The suspension of claim 1 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 50% of a length between the proximate end and the distal end of the tongue portion.

6. A dielectric layer configured to overlay a spring metal layer in a suspension assembly, the dielectric layer part of a flexure including a gimbal, a proximal end, and a distal end, the flexure having a longitudinal axis extending from the proximal end to the distal end, the gimbal includes a spring metal layer having a base portion, a tongue, and a pair of spring arms extending from the base portion to the tongue, the dielectric layer comprising:
a tongue portion including a proximate end and a distal end;
trace portions extending from the distal end of the tongue portion, the trace portions comprising a first plurality of traces and a second plurality of traces; and
an aperture configured to be aligned with a void of the spring metal layer and defined by at least the proximate end of the tongue portion, the aperture includes an elongated opening with opposing ends and at least a first slit and second slit each extending less than a full-length from the aperture to the trace portions, the void formed in the spring metal layer between the tongue and the base portion and partially surrounding the tongue, the void includes a central opening with opposing ends, first and second channels extending from the opposing ends of the central opening, and
the first plurality of traces and the second plurality of traces are configured to converge toward one another over the void to define a portion of the aperture, and wherein the first plurality of traces and the second plurality of traces are coupled via a bridge.

7. The dielectric layer of claim 6 , wherein the first slit and the second slit extend from the opposing ends of the elongated opening and are at least partially aligned with channels of the void of the spring metal layer.

8. The dielectric layer of claim 7 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 40% of a length between the proximate end and the distal end of the tongue portion.

9. The dielectric layer of claim 7 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 25% of a length between the proximate end and the distal end of the tongue portion.

10. The dielectric layer of claim 7 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 80% of a length between the proximate end and the distal end of the tongue portion.

11. The dielectric layer of claim 7 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 50% of a length between the proximate end and the distal end of the tongue portion.

12. The dielectric layer of claim 7 , wherein a portion of the trace portions is configured to couple over the void of the spring metal layer.

13. A flexure comprising:
a gimbal, a proximal end, and a distal end, the flexure having a longitudinal axis extending from the proximal end to the distal end, the gimbal includes a spring metal layer including a base portion, a tongue, and a pair of spring arms extending from the base portion to the tongue, a dielectric layer overlaying the spring metal layer and a conductive metal layer overlying the dielectric layer, the conductive metal layer including a first plurality of traces extending from the base portion to the tongue and a second plurality of traces extending from the base portion to the tongue;
a void formed in the spring metal layer between the tongue and the base portion and partially surrounding the tongue, the void includes a central opening with opposing ends, first and second channels extending from the opposing ends of the central opening, wherein the dielectric layer includes a tongue portion, trace portions, and an aperture aligned with the void and defined by the tongue portion and the trace portions,
the tongue portion includes a proximate end and a distal end, the trace portions extending from the distal end of the tongue portion, and
the aperture includes an elongated opening with opposing ends partially aligning with the central opening of the void, and a first slit and a second slit extending from the opposing ends of the elongated opening, and
the first plurality of traces and the second plurality of traces extend from the base portion and converge toward one another over the void, and wherein the first plurality of traces and the second plurality of traces are coupled via a bridge.

14. The flexure of claim 13 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the elongated opening up to 40% of a length between the proximate end and the distal end of the tongue portion.

15. The flexure of claim 13 , wherein the first slit and the second slit of the aperture extend from the opposing ends of the

Assignees

• Magnecomp Corp

Inventors

• Pankaew Ekaratch
• Ee Kuen Chee
• Sudachun Preecha
• Glaess David
• Angsutanasombat Chanatkarn

Classifications

• G11B5/4833 Primary

  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 title

• G11B5/486

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