Dynamic magnetic information storage or retrieval – Head mounting – Disk record
Reexamination Certificate
2011-04-19
2011-04-19
Castro, Angel A. (Department: 2627)
Dynamic magnetic information storage or retrieval
Head mounting
Disk record
Reexamination Certificate
active
07929252
ABSTRACT:
Multi-layer ground plane structures and methods of manufacture for integrated lead suspension flexures. A flexure in accordance with one embodiment of the invention includes an insulating layer, a plurality of traces on the insulating layer and a stainless steel base layer on the side of the insulating layer opposite the traces. The stainless steel base layer includes one or more void portions with voids in the base layer opposite the insulating layer from the traces and one or more backed portions with the base layer backing the traces. A plurality of patterned and transversely-spaced first conductive ground planes are located opposite the insulating layer from the traces at the void portions and backed portions of the stainless steel base layer. A continuous gold second conductive ground plane is located opposite the insulating layer and the first ground planes from the side of the insulating layer adjacent to the traces at the void portions and backed portions of the stainless steel base layer. The gold ground plane can be used as an etch stop during formation of the voids in the base layer.
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Hentges Reed T.
Ladwig Peter F.
Nevala Lance
Swanson Kurt C.
Castro Angel A.
Faegre & Benson LLP
Hutchinson Technology Incorporated
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