Patent ID: 7408744
Filing Date: 2008-08-05
Classification: G11B

Abstract:
1. A disk drive suspension comprising a base portion, a spring portion having a given stiffness and including a hinge, said hinge being supported by said base portion, and a beam portion supported by said hinge, an electrical interconnect comprising a metal layer and plural pairs of conductive traces separated from said metal layer by an insulative layer, said electrical interconnect being supported by said suspension and having a metal layer section traversing said hinge, said metal layer section when unrelieved tending to desirably decrease electrical interconnect impedance in said conductive traces but undesirably add stiffness to said spring portion, said metal layer section being multiply and distributively locally relieved in a substantially sinuous pattern of removed and retained subregions to bend more readily than said unrelieved metal layer section thereby to lessen the stiffness added to said spring portion by said unrelieved metal layer section in greater proportion than said pattern decreases impedance reductions in said conductive traces effected by said unrelieved metal layer section.