| 摘要 |
Structures and methods for creating a vertical offset between suspension springs or fingers within a suspension head assembly for use in a disk drive are disclosed, the vertical offset helping to reduce track mis-registration errors. The base plate and load beam may be made from three-layer composite materials that have been etched to create either recesses therein into which the suspension springs ends are placed and then welded, or the base plate and load beam may be etched to create mesas on which the ends of one of the suspension springs are welded. The three layers may comprise stainless steel, polyimide, and stainless steel. In another embodiment, one of the suspension springs is a three-layer material that has been etched to create a raised central portion that is vertically offset from the other suspension spring. In another embodiment, spacers are employed as shims underneath one of the suspension springs. Generally, at least one of a spring extension, the load beam and the mount plate comprise a laminate material.
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