Patent ID: 7322094

Claim:
A method for manufacturing a head stack assembly of a disk drive unit, comprising: forming a first head arm assembly wherein the first head arm assembly is formed by: forming a first head gimbal assembly; providing a raw drive arm and stamping a portion of the raw drive arm to form a spacer; and coupling the first head gimbal assembly with the stamped drive arm together; forming a second head arm assembly wherein the second head arm assembly is formed by: forming a second head gimbal assembly, a second drive arm and a voice coil; and coupling the second head gimbal assembly, the second drive arm and the voice coil together; and assembling the first and second head arm assemblies together; wherein forming the second head arm assembly further comprises forming a flexible printed circuit assembly thereon wherein the flexible printed circuit assembly is formed by: forming a flexible printed circuit having at least one alignment hole and a connection leg with two voice coil pads and a grounding pad thereon; forming a connector; and coupling the flexible printed circuit with the connector together; and forming the second drive arm comprises forming a grounding pin and two connection pins thereon.