Method and apparatus for adjusting plating solution flow charact

Details Method and apparatus for adjusting plating solution flow charact Method and apparatus for adjusting plating solution flow charact

1990-01-02

1991-03-19

Tufariello, T. M.

Chemistry: electrical and wave energy

Processes and products

C25D 502

Patent

active

050008277

ABSTRACT:
A method and apparatus for electroplating metallized bumps of substantially uniform height on predetermined terminal areas of a substrate. Cup plating apparatus includes elements for adjusting parameters affecting the geometry of the substrate relative to the plating cup, as well as flow rate of the electroplating solution against the substrate surface. By achieving non-laminar flow of the electroplating solution near the substrate edges, the plating characteristics of the electroplating solution are altered in this region, substantialy offsetting "edge effect", so that the resulting plated bump height is substantially uniform across the substrate.

REFERENCES:
patent: 4287029 (1981-09-01), Shimamura

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