Disk drives, head stack, head gimbal and suspension assemblies having positional conductive features
View Patent ↗A disk drive includes a disk, and a head stack assembly (HSA). The HSA includes a preamplifier; an actuator assembly that defines an actuator arm; a load beam supported by the actuator arm, the load beam defining a registration feature. A flexure is coupled to the load beam, the flexure defining an opening that is centered on the registration feature and including a plurality of conductive formations. The conductive formations include a plurality of conductive flexure connection pads that collectively define a center point; a plurality of conductive traces to electrically couple the plurality of flexure connection pads to the preamplifier, and a conductive feature disposed away from and aligned with the center point, the conductive feature at least partially surrounding the opening within the flexure. A slider is coupled to the plurality of flexure connection pads for reading and writing to the disk.
1. A disk drive comprising:
a disk, and
a head stack assembly, the head stack assembly including:
a preamplifier;
an actuator assembly that defines an actuator arm;
a load beam supported by the actuator arm, the load beam defining a registration feature;
a flexure coupled to the load beam, the flexure defining an opening that is centered on the registration feature and including a plurality of conductive formations, the conductive formations including:
a plurality of conductive flexure connection pads that collectively define a center point;
a plurality of conductive traces to electrically couple the plurality of flexure connection pads to the preamplifier, and
a conductive feature disposed away from and aligned with the center point, the conductive feature at least partially surrounding the opening within the flexure, and
a slider coupled to the plurality of flexure connection pads for reading and writing to the disk.
2. The disk drive of claim 1 , further including a dimple formed in the load beam, the dimple with the being aligned registration feature, which registration feature is aligned with the with the conductive feature.
3. The disk drive of claim 1 , wherein the center point is defined such that an equal number of flexure connection pads are disposed on either side thereof.
4. The disk drive of claim 1 , wherein the slider includes a plurality of slider connection pads configured to electrically couple to corresponding ones of the plurality of conductive flexure connection pads.
5. The disk drive of claim 1 , wherein the registration feature defines a through hole.
6. The disk drive of claim 1 , wherein the plurality of conductive formations are formed from a same masking and etching process.
7. A head stack assembly, comprising:
an actuator assembly that defines an actuator arm;
a load beam supported by the actuator arm, the load beam defining a registration feature;
a flexure coupled to the load beam, the flexure defining an opening that is centered on the registration feature and including a plurality of conductive formations, the conductive formations including:
a plurality of conductive flexure connection pads that collectively define a center point;
a plurality of conductive traces configured to electrically couple the plurality of flexure connection pads to a preamplifier, and
a conductive feature disposed away from and aligned with the center point, the conductive feature at least partially surrounding the opening within the flexure, and
a slider coupled to the plurality of flexure connection pads for reading and writing to the disk.
8. The head stack assembly of claim 7 , further including a dimple formed in the load beam, the dimple being aligned with the registration feature, which registration feature is aligned with the conductive feature.
9. The head stack assembly of claim 7 , wherein the center point is defined such that an equal number of flexure connection pads are disposed on either side thereof.
10. The head stack assembly of claim 7 , wherein the slider includes a plurality of slider connection pads configured to electrically couple to corresponding ones of the plurality of conductive flexure connection pads.
11. The disk head stack assembly of claim 7 , wherein the registration feature defines a through hole.
12. The head stack assembly of claim 7 , wherein the plurality of conductive formations is formed from a same masking and etching process.
13. A head gimbal assembly for attachment to an actuator arm in a disk drive, the head gimbal assembly:
a load beam configured to be supported by the actuator arm, the load beam defining a registration feature;
a flexure coupled to the load beam, the flexure defining an opening that is centered on the registration feature and including a plurality of conductive formations, the conductive formations including:
a plurality of conductive flexure connection pads that collectively define a center point;
a plurality of conductive traces configured to electrically couple the plurality of flexure connection pads to a preamplifier, and
a conductive feature disposed away from and aligned with the center point, the conductive feature at least partially surrounding the opening within the flexure, and
a slider coupled to the plurality of flexure connection pads for reading and writing to the disk.
14. The head gimbal assembly of claim 13 , further including a dimple formed in the load beam, the dimple being aligned with the registration feature, which registration feature is aligned with the conductive feature.
15. The head gimbal assembly of claim 13 , wherein the center point is defined such that an equal number of flexure connection pads are disposed on either side thereof.
16. The head gimbal assembly of claim 13 , wherein the slider includes a plurality of slider connection pads configured to electrically couple to corresponding ones of the plurality of conductive flexure connection pads.
17. The head gimbal assembly of claim 13 , wherein the registration feature defines a through hole.
18. The head gimbal assembly of claim 13 , wherein the plurality of conductive formations is formed from a same masking and etching process.
19. A suspension assembly for attachment to an actuator arm in a disk drive and for supporting a slider, the suspension assembly comprising:
a load beam configured to be supported by the actuator arm, the load beam defining a registration feature;
a flexure coupled to the load beam, the flexure defining an opening that is centered on the registration feature and including a plurality of conductive formations, the conductive formations including:
a plurality of conductive flexure connection pads that collectively define a center point;
a plurality of conductive traces configured to electrically couple the plurality of flexure connection pads to a preamplifier, and
a conductive feature disposed away from and aligned with the center point, the conductive feature at least partially surrounding the opening within the flexure.
20. The suspension assembly of claim 19 , further including a dimple formed in the load beam, the dimple being aligned with the registration feature, which registration feature is aligned with the conductive feature.
21. The suspension assembly of claim 19 , wherein the center point is defined such that an equal number of flexure connection pads are disposed on either side thereof.
22. The suspension assembly of claim 19 , wherein the registration feature defines a through hole.
23. The suspension assembly of claim 19 , wherein the plurality of conductive formations are formed from a same masking and etching process.