Suspension board with a circuit for use in a hard disk drive
AssigneeNitto Denko Corporation
InventorMasaki Mizutani
Life of this patent
Estimating the term…
Abstract
A suspension board with a circuit for use in a hard disk drive shows a small change in PSA (attitude angle) relative to a change in humidity and can support a slider including a magnetic head in a stable and highly precise manner. The suspension board with a circuit for use in a hard disk drive includes a substrate made of metal, an undercoat insulating layer provided on the substrate made of metal, a conductive layer provided on the undercoat insulating layer 3, and a cover insulating layer provided so as to cover the conductive layer. The tensile storage modulus at 25° C. of at least one of the undercoat insulating layer 3 and the cover insulating layer 5 is set to 0.1 to 1.0 GPa.
Claims8
A suspension board, comprising:
- a substrate made of metal;
- an undercoat insulating layer provided on the substrate made of metal;
- a conductive layer formed of a predetermined wiring circuit pattern provided on the undercoat insulating layer;
- and
- a cover insulating layer provided so as to cover the conductive layer,
- wherein at least one of the undercoat insulating layer and the cover insulating layer has a tensile storage modulus at 25° C. of 0.1 to 1.0 GPa.
A suspension board, comprising:
- a substrate made of metal;
- an undercoat insulating layer provided on the substrate made of metal;
- a first conductive layer formed of a predetermined wiring circuit pattern provided on the undercoat insulating layer;
- an intermediate insulating layer provided on the first conductive layer;
- a second conductive layer formed of a predetermined wiring circuit pattern provided on the intermediate insulating layer;
- and
- a cover insulating layer provided on the second conductive layer,
- wherein at least one insulating layer of the undercoat insulating layer, the intermediate insulating layer, and the cover insulating layer has a tensile storage modulus at 25° C. of 0.1 to 1.0 GPa.
Dependencies are inferred from the claim text.