Disk drive and head assembly used in the same

Abstract

Embodiments in accordance with the present invention disclose hole sequences that are formed in the metal layer of a trace to adjust rigidity and crosstalk noise resulting from the hole sequences is thereby suppressed. A suspension according to one aspect of the invention includes a trace adapted to transmit a signal of a head slider. The trace partially extends along the side surface of the suspension. The trace includes a metal layer, a plurality of transmission lines formed above the metal layer and an insulating layer. A hole sequence overlapping the transmission lines is formed in part of the metal layer, which contributes to a reduction in transmission loss. Another hole sequence of the metal layer is formed at a position opposed to the hinge portion of the suspension. This reduces the rigidity of the wiring structure portion in the hinge portion, thereby preventing interference with the behavior of the suspension at the hinge portion.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic plan view illustrating the entire configuration of a hard disk drive according to the present embodiment.

FIG. 2 is a schematic cross-sectional view illustrating the configuration of a head slider provided with a heater according to the present embodiment.

FIG. 3 includes schematic plan views illustrating the configuration of a head gimbal assembly according to the present embodiment.

FIG. 4 is an exploded perspective view schematically illustrating the configuration of the head gimbal assembly according to the present embodiment.

FIG. 5 is a schematic plan view illustrating the structure of a trace in a region opposed to a hinge portion according to the present embodiment.

FIG. 6 includes schematic diagrams illustrating an structure of transmission lines and a hole sequence of the trace in the region opposed to the hinge portion according to the present embodiment.

FIG. 7 includes schematic diagrams illustrating an effect of a hole sequence overlapping a write line pair on an induction current and a generated magnetic field.

FIG. 8 is a schematic diagram illustrating another structure of transmission lines and hole sequences of the trace in the region opposed to the hinge portion according to the present embodiment.

FIG. 9 is a schematic diagram illustrating another structure of transmission lines and hole sequences of the trace in the region opposed to the hinge portion according to the present embodiment.

FIG. 10 is a schematic diagram illustrating another structure of transmission lines and hole sequences of the trace in the region opposed to the hinge portion according to the present embodiment.

FIG. 11 is a schematic diagram illustrating another structure of transmission lines and hole sequences of the trace in the region opposed to the hinge portion according to the present embodiment.

Claims

1. A head assembly comprising: a head adapted to access a disk on which data is recorded;a head support member supporting the head; anda wiring structure portion including:a metal layer;a plurality of transmission lines extending, without intersecting with each other, above the metal layer and connected to the head; andan insulating layer formed between the metal layer and the plurality of transmission lines;wherein the plurality of transmission lines include:a write line pair adapted to transmit a write signal;a read line pair adapted to transmit a read signal; anda third line pair adapted to transmit a signal different from the write signal and the read signal; andwherein the metal layer has:a first hole sequence overlapping the write line pair, spaced apart from the other transmission lines and arranged in a direction where the write line pair extends; anda second hole sequence spaced apart from the write line pair, overlapping a line pair different from the write line pair and arranged in a direction where the line pair different from the write line pair extends.

2. The head assembly according to claim 1, wherein the second hole sequence overlaps the read line pair and is spaced apart from the other transmission lines.

3. The head assembly according to claim 1, wherein the third line pair extends along and between the write line pair and the read line pair.

4. The head assembly according to claim 2, wherein the metal layer has a third hole sequence overlapping the third line pair, spaced apart from the other transmission lines and arranged in a direction where the third line pair extends.

5. The head assembly according claim 4, wherein the third line pair extends along and between the write line pair and the read line pair.

6. The head assembly according to claim 1, wherein a line pair adjacent to the write line pair extends along and between the line pair overlapped by the second hole sequence and the write line pair, the metal layer has no holes overlapping the line pair adjacent to the write line pair, between the first hole sequence and the second hole sequence.

7. The head assembly according to claim 6, wherein the line pair overlapped by the second hole sequence is the read line pair, and the line pair adjacent to the write line pair is the third line pair.

8. The head assembly according to claim 6, wherein the third line pair is connected to a heater included in the head.

9. A head assembly comprising: a head adapted to access a disk on which data is recorded;a suspension supporting the head and including a hinge portion generating a resilient force balancing with a lifting force of the head;a wiring structure portion partially extending along the suspension and including:a metal layer;a plurality of transmission lines extending, without intersecting with each other, above the metal layer and connected to the head; andan insulating layer formed between the metal layer and the plurality of transmission lines;wherein the metal layer includes in a region including a position opposed to the hinge portion:a first hole sequence overlapping a line pair adapted to transmit a signal, spaced apart from the other transmission lines and arranged along the line pair; anda second hole sequence spaced apart from the line pair, overlapping another transmission line and arranged along said another transmission line; andwherein the first hole sequence continuously extends beyond the region toward the head and the side opposite to a leading end of the head and the second hole sequence terminates at ends of the region.

10. The head assembly according to claim 9, wherein the first hole sequence overlaps a write line pair adapted to transmit a write signal, and the second hole sequence overlaps a line pair adapted to transmit a signal and is spaced apart from the other transmission lines.

11. The head assembly according to claim 10, wherein a line pair adjacent to the write line pair extends along and between the line pair overlapped by the second hole sequence and the write line pair, and the metal layer has no holes overlapping the line pair adjacent to the write line pair, between the first hole sequence and the second hole sequence.

12. The head assembly according to claim 11, wherein the second hole sequence overlaps a read line pair adapted to transmit a read signal.

13. The head assembly according to claim 10, wherein the plurality of transmission lines includes a read line pair adapted to transmit a read signal, and another transmission line extends along and between the read line pair and the write line pair.

14. The head assembly according to claim 9, wherein said another transmission line overlapped by the second hole sequence overlaps holes formed in the metal layer in only the region.

15. A disk drive comprising: a motor for rotating a disk on which data is recorded;a head adapted to access the disk; andan actuator for moving a head flying above the disk by supporting the head and pivoting about a pivot shaft;wherein the actuator includes:a suspension supporting the head and including a hinge portion generating a resilient force balancing with a lifting force of the head;an arm supporting the suspension; anda wiring structure portion partially extending along respective side surfaces of the suspension and the arm and including: a metal layer; a plurality of transmission lines extending, without intersecting with each other, above the metal layer and connected to the head; and an insulating layer formed between the metal layer and the plurality of transmission lines;wherein the metal layer includes in a continuous region including a position opposed to the hinge portion:a first hole sequence overlapping a line pair adapted to transmit a signal, spaced apart from the other transmission lines and arranged along the line pair; anda second hole sequence spaced apart from the line pair, overlapping another transmission line and arranged along said another transmission line; andwherein the first hole sequence continuously extends beyond the region toward the head and the side opposite to a leading end of the head and the second hole sequence terminates at ends of the region.