International Business Machines Corporation

Siemens Aktiengesellschaft

Ron Mendelson

Frank Prein

Ronald Hoyer

Frank Alswede

William Davies

A multi-layer test pad on a semiconductor wafer, which includes an underlying matrix of interconnected first pads, which are arranged in rows and columns. The multi-layer test pad includes an oxide layer disposed above the underlying matrix and in between the rows and columns. The multi-layer test pad further includes an overlying matrix of interconnected second pads disposed above the oxide layer. Each of the second pads completely overlaps at least nine of the first pads, including four oxide regions surrounding a center first pad of the nine of the first pads. The nine of the first pads are arranged as 3.times.3 block of the first pads.

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Richmond, VT, United States of America

Ron Mendelson