A gate array cell architecture is provided with routing tracks at variable track pitches, thereby increasing the density of the architecture. Orientation of the devices in the gate cells perpendicularly to the routing tracks in the second metallization layer provides an increased porosity in this layer....http://www.google.es/patents/US5990502?utm_source=gb-gplus-sharePatente US5990502 - High density gate array cell architecture with metallization routing tracks having a variable pitch
High density gate array cell architecture with metallization routing tracks ...
