Patent ID: 8492268

Claim:
A method comprising: providing a first metal layer having wiring running in a first direction; providing a second metal layer having wiring running in a second direction perpendicular to the first direction; evaluating which of the following structures presents a lowest possibility of degrading yield: a) use of a wrong way metal extending in a direction perpendicular to the second direction within the second metal layer and a pair of vias interconnecting the wrong way metal to wiring in the first metal layer, or b) a viabar, in a first via layer between the first metal layer and the second metal layer, and interconnecting the first metal layer to the second metal layer at a first location where the first metal layer vertically coincides with the second metal layer and, at a second location, interconnecting to wiring of the first metal layer but not wiring of the second metal layer; and implementing the structure that presents a lowest possibility of degrading yield.