Chip-on-suspension electronics close preamp head gap

摘要

For a decade or more, disk-drive designers have been moving the preamp ever closer to the read/write (R/W) head in an effort to reduce the parasitic load of the flexible interconnect and improve channel performance by reducing noise and signal degradation. Starting outside the drive bowl in 1990, preamps moved inside the bowl by 1993, and today sit on the side of the E-block about 50 mm from the (R/W) head. With ever-increasing data rates, conventional preamps mounted on the E-block are having more difficulty reaching new performance targets, and many drive designers are looking to chip-on-suspension (COS) technology for a solution.