Patent ID: 6693446
Filing Date: 2004-02-17
Classification: G01R,H01L

Abstract:
An apparatus of testing a leakage protection reliability of an integrated circuit interconnection, comprising:at least one comb-like pattern comprising one straight length portion, multiple tooth portions and vias; a serpentine-like pattern comprising multiple unit parts and at least one connection part; and means for applying a defined bias voltage between the comb-like pattern and the serpentine-like pattern to generate a potential difference between the two patterns, wherein the multiple tooth portions are substantially parallel with one another, are substantially orthogonal to the length portion at the same level with the length portion, and have substantially the same lengths, the vias of the comb-like pattern are vertically formed from the ends of the tooth portions through an interlayer dielectric layer, wherein the unit part comprises: two tooth parallel parts whose ends are laterally spaced from the ends of the tooth portions, being substantially parallel with the tooth portions; a length parallel part which is parallel to the length portion, connected with the ends of the two tooth parallel parts and shorter than the tooth parallel part at least by a minimum design length according to a specific design rule; and vias of the serpentine-like pattern, being present at the ends of the two tooth parallel parts, vertical to the two tooth parallel parts, parallel with the via of the end of the tooth portion, and spaced from the via of the comb-like pattern by the minimum design length according to the specific design rule, through the interlayer dielectric layer, wherein the connection part is substantially parallel with the length portion, present at another interconnection layer spaced from the tooth parallel part by the interlayer dielectric layer, and connected with the two vias of the serpentine-like pattern to connect the two unit parts electrically.