An exemplary cell library includes a first plurality of types of standard cells. Each of the first plurality of types of standard cells includes threshold voltage adjusting patterns. The upper and the lower boundaries of the threshold voltage adjusting patterns contact the upper and lower boundaries...http://www.google.de/patents/US7469389?utm_source=gb-gplus-sharePatent US7469389 - Standard cell library, method of designing semiconductor integrated circuit, semiconductor integrated circuit pattern, and semiconductor integrated circuit
