Method for forming aligned interconnections between logic stages

摘要

A layout for random logic in which different stages are assigned to columns according to the flow of logic signal. Each stage may consist of several parallel logic blocks defining a logic function and having an output. The logic blocks are implemented by several diffusion areas, not necessarily contiguous. The output line of a logic block is aligned vertically to match one or more gate electrodes of following stages that it drives. The interconnection to the following stages can be implemented by a single horizontal polysilicon line which also functions as the gate electrodes. The breaks in the diffusion of a logic block can accommodate the passage of polysilicon lines not being used in that logic block.