SUSPENSION CIRCUIT SUBSTRATE, HARD DISK-USE SUSPENSION AND HARD DISK DRIVE

摘要

A suspension circuit substrate (1) is provided with a metal support substrate (12), a first insulating layer (11) disposed upon the metal support substrate (12) and comprising insulating material, a conductive layer (10) disposed upon the first insulating layer (11) and constituting a wire, and a second insulating layer (13) disposed upon the first insulating layer (11) and the conductive layer (10) and comprising insulating material. The suspension circuit substrate (1) is constituted so that when a load is applied in a thickness direction at a position corresponding to a first insulating aperture portion (11O) of the conductive layer (10), if it is assumed that a first stress F1 is a stress generated in the conductive layer (10) at a position corresponding to a periphery of the first insulating aperture portion (11O), and a second stress F2 is a stress generated in the conductive layer (10) at a position corresponding to a periphery of the metal support substrate aperture portion (12O), then F1 2.