Head gimbal assembly and disk device with the same

摘要

According to an embodiment, a head gimbal assembly includes a support plate, a wiring member, a magnetic head and drive members. A gimbal portion of the wiring member includes a thin metallic plate including a tongue portion mounted with a magnetic head, a proximal end portion fixed to the support plate, support projections, and link portions, an insulating layer including first bridge portions extending from the proximal end portion to the tongue portion, and second bridge portions extending from the proximal end portion to middle portions of the first bridges, and a conducive layer including signal wirings extending to the tongue portion through the second and first bridge portions, and reinforcement wiring portions. The drive members are provided at the first bridge portions.

主权项

1. A head gimbal assembly comprising:
a support plate including a distal end portion having a convex portion; a wiring member attached to the support plate and comprising a thin metallic plate, an insulating layer on the thin metallic plate and a conductive layer on the insulating layer to form a plurality of wirings, the wiring member comprising a gimbal portion located at the distal end portion of the support plate; wherein, at the gimbal portion, the thin metallic plate comprises a proximal end portion fixed to the support plate, a tongue portion located apart from the proximal end portion and located at the convex portion, a pair of support projections projecting from both sides of the tongue portion and located close to the convex portion, and a pair of link portions extending along the both sides of the tongue portion and connecting the proximal end portion and the tongue portion; the insulating layer comprises a distal end portion on the tongue portion, a pair of first bridges extending side by side with the link portions from the proximal end portion to the distal end portion of the insulating layer along the both sides of the tongue portion and each having a part fixed to the support projection, and a pair of second bridges extending side by side with the first bridge portions from the proximal end to middle portions of the first bridge portions to join the first bridge portions; and the conductive layer comprises a plurality of signal wirings extending from the proximal end portion to the distal end portion of the insulating layer through the second bridge portions and the first bridge portions, a plurality of drive wirings, and reinforcement wiring portions provided at the first bridge portions and close to joining portions of the first and second bridge portions; a magnetic head attached to the tongue portion and electrically connected to the signal wirings of the wiring member; and drive members fixed to the first bridges in positions between the proximal end portion and the joining portions, connected to the drive wirings, and configured to expand and contract by an applied voltage in a longitudinal direction of the first bridge portions.