Disk drives, head stack, head gimbal and suspension assemblies having a compliant suspension tail design for solder reflow
View Patent ↗A suspension assembly for a disk drive includes a load beam and a flexure. The flexure has a first end including a plurality of bond pads for electrical connection to a slider and a second end having a tail for attachment to a flexible cable. The tail includes a support layer having a free end defining cutouts forming a plurality of peninsula-shaped regions, such that a plane oriented perpendicular to the support layer and disposed between the peninsula-shaped regions and extending beyond the free end of the tail does not cut through any support layer material. An insulating layer may be disposed on the support layer. A connection pad may be disposed on the insulating layer on each of the peninsula-shaped regions. Conductive traces may be disposed on the insulating layer to electrically connect each connection pad to a corresponding bond pad. A head is coupled to the bond pads.
1. A suspension assembly for attachment to an actuator arm of a head stack assembly in a disk drive and for supporting a head, the suspension assembly comprising:
a first end that includes a plurality of bond pads configured for electrical connection to the head;
a second end that defines a tail configured for attachment to a flexible cable attached to the actuator arm assembly, the tail including:
a support layer having a free end that defines a plurality of cutouts to form a plurality of peninsula-shaped regions, such that a plane oriented perpendicularly relative to the support layer and disposed between adjacent ones of the plurality of peninsula-shaped regions and extending beyond the free end of the tail does not cut through the support layer;
a layer of insulating material disposed on the support layer;
a plurality of connection pads, each being disposed on the layer of insulating material within a corresponding one of the plurality of peninsula-shaped regions;
a plurality of conductive traces disposed on the layer of insulating material to electrically connect each of the plurality of connection pads to a corresponding one of the plurality of bond pads at the first end of the flexure.
2. A head gimbal assembly for a head stack assembly of a disk drive, the head stack assembly including a body portion and an actuator arm cantilevered from the body portion, the head gimbal assembly comprising:
a head;
a load beam coupled to the head stack assembly and to the head;
a flexure at least partially supported by the load beam and including:
a first end that includes a plurality of bond pads configured for electrical connection to the head;
a second end that defines a tail configured for attachment to a flexible cable attached to the actuator arm assembly, the tail including:
a support layer having a free end that defines a plurality of cutouts to form a plurality of peninsula-shaped regions, such that a plane oriented perpendicularly relative to the support layer and disposed between adjacent ones of the plurality of peninsula-shaped regions and extending beyond the free end of the tail does not cut through the support layer;
a layer of insulating material disposed on the support layer;
a plurality of connection pads, each being disposed on the layer of insulating material within a corresponding one of the plurality of peninsula-shaped regions;
a plurality of conductive traces disposed on the layer of insulating material to electrically connect each of the plurality of connection pads to a corresponding one of the plurality of bond pads at the first end of the flexure, and a slider coupled to the plurality of bond pads for reading and writing to the disk.
3. A head stack assembly for a disk drive, the head stack assembly comprising:
a body portion;
an actuator arm cantilevered from the body portion;
a head gimbal assembly supported by the actuator arm and including:
a head;
a load beam;
a flexure at least partially supported by the load beam and including:
a first end that includes a plurality of bond pads configured for electrical connection to the head;
a second end that defines a tail configured for attachment to a flexible cable attached to the actuator arm assembly, the tail including:
a support layer having a free end that defines a plurality of cutouts to form a plurality of peninsula-shaped regions, such that a plane oriented perpendicularly relative to the support layer and disposed between adjacent ones of the plurality of peninsula-shaped regions and extending beyond the free end of the tail does not cut through the support layer;
a layer of insulating material disposed on the support layer;
a plurality of connection pads, each being disposed on the layer of insulating material within a corresponding one of the plurality of peninsula-shaped regions;
a plurality of conductive traces disposed on the layer of insulating material to electrically connect each of the plurality of connection pads to a corresponding one of the plurality of bond pads at the first end of the flexure, and
a slider coupled to the plurality of bond pads for reading and writing to the disk.
4. A disk drive, comprising:
a disk;
a head stack assembly, comprising:
a body portion;
an actuator arm cantilevered from the body portion;
a head gimbal assembly supported by the actuator arm and including:
a head;
a load beam;
a flexure at least partially supported by the load beam and including:
a first end that includes a plurality of bond pads configured for electrical connection to the head;
a second end that defines a tail configured for attachment to a flexible cable attached to the actuator arm assembly, the tail including:
a support layer having a free end that defines a plurality of cutouts to form a plurality of peninsula-shaped regions, such that a plane oriented perpendicularly relative to the support layer and disposed between adjacent ones of the plurality of peninsula-shaped regions and extending beyond the free end of the tail does not cut through the support layer;
a layer of insulating material disposed on the support layer;
a plurality of connection pads, each being disposed on the layer of insulating material within a corresponding one of the plurality of peninsula-shaped regions;
a plurality of conductive traces disposed on the layer of insulating material to electrically connect each of the plurality of connection pads to a corresponding one of the plurality of bond pads at the first end of the flexure, and
a slider coupled to the plurality of bond pads for reading and writing to the disk.