Process for manufacturing a printed wiring board
AssigneeInternational Business Machines Corporation
InventorsChristina M. Boyko, Robert J. Day, Kristen A. Stauffer
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AssigneeInternational Business Machines Corporation
InventorsChristina M. Boyko, Robert J. Day, Kristen A. Stauffer
Estimating the term…
The present invention teaches a simplified process for fabricating high density printed wiring boards using a semi-additive process. Steps required to achieve this objective include adhering an electroless plated copper commoning layer to a surface roughened dielectric substrate. Subsequently, the commoning layer is photolithographically personalized by covering the commoning layer with a resist and then uncovering predetermined areas of the aforementioned commoning layer. Consequently, the semi-additive method involves electroplating copper onto the uncovered areas of the commoning layer, thereby generating copper features and circuitry. Finally, the semi-additive process requires the stripping of the remaining photoresist, and the unplated electroless copper layer is etched in order to electronically isolate the copper features and circuitry lines.
A method for fabricating a printed wiring board, comprising the steps of:
Dependencies are inferred from the claim text.