Head stack assembly, hard disk drive, and method of connecting a head gimbal assembly to a flexible printed circuit assembly in a head stack assembly

A method of connecting a head gimbal assembly to a flexible printed circuit assembly in a head stack assembly comprising steps of:

• providing at least one head gimbal assembly with at least one dual stage actuator formed on a suspension of the head gimbal assembly;
• forming a row of first bonding pads on a flexure tail of the suspension, a first dual stage actuator pad and a first dummy pad arranged at two sides of said row of first bonding pads, connecting the first dual stage actuator pad with the dual stage actuator, and connecting the first dual stage actuator pad with the first dummy pad via a jumping lead;
• and
• forming at least one row of second bonding pads, at least one second dual stage actuator pad and at least one second dummy pad on a flexible printed circuit assembly;
• placing the flexure tail perpendicularly to the flexible printed circuit assembly;
• and
• connecting the row of second bonding pads, the second dual stage actuator pad and the second dummy pad with the row of first bonding pads, the first dual stage actuator pad and the first dummy pad respectively.

A hard disk drive, comprising:

• a motor base;
• a disk stack comprising at least one disk;
• a spindle motor being attached to the motor base for rotating the disk stack;
• and
• a head stack assembly, comprising at least one head gimbal assembly and a flexible printed circuit assembly for controlling the head gimbal assembly, the head gimbal assembly having a suspension and a slider mounted thereon, the suspension including at least one dual stage actuator for actuating the slider, and a flexure tail connecting to the flexible printed circuit assembly perpendicularly;
• wherein the flexure tail comprises a row of first bonding pads connected with traces on the suspension, a first dual stage actuator pad and a first dummy pad arranged at two sides of said row of first bonding pads, the first dual stage actuator pad is connected with the dual stage actuator, and the first dual stage actuator pad and the first dummy pad are connected together via a jumping lead;
• and the flexible printed circuit assembly comprises at least one row of second bonding pads, at least one second dual stage actuator pad and at least one second dummy pad arranged for connecting with the row of first bonding pads, the first dual stage actuator pad and the first dummy pad respectively.