| 摘要 |
A dramatic way to increase I/O performance, of a disk drive, is by the addition of another actuator to the disk drive. Dual-actuators allows the drive to overlap seeks, which produces a seamless stream of data to the host system by eliminating the breaks caused by conventional single actuators when they are repositioned. A dual-modular actuator assembly that replaces todays single rotary actuator assemblies, on a 1:1 basis, consists of; an integrated arm that has combined three parts into a single part using existing high volume semi-conductor manufacturing processes; integrated and data arms that posses rigid vibrational behavior allowing track densities to increase toward 100,000 tpi; elimination of acoustic noise due to out of plane spiral coil vibrations; precision attachment of HGA to arm surface to disk by laser welding HGA load beam directly to arm surface; an automated and precise assembly of arms on a bearing sleeve creating a modular actuator assembly having high stiffness and low moment of inertia; the stacking of two or more modular actuators on a common shaft and which rotate independently of each other; Voice Coil Motor (VCM), having multiply magnetic circuits. to interact with the coil structure of each modular-actuator assembly;
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