Abstract: A method for circuit layout migration comprises creating a list of layout components in a source layout; determining a plurality of first groups of layout components being regularly aligned horizontally or vertically; determining first subsets of layout components which each belong to at least two of a respective set of determined first groups; determining a plurality of second groups of layout components, each second group comprising mutually exclusive ones of the first subsets of layout components; determining symmetry axes for pairs of second groups; building a constraint graph of the layout components of the source layout using alignment constraints for the alignment of layout components within each of the second groups and distance constraints for preserving a regularity pattern within each of the second groups and symmetry constraints for the determined symmetry axes for pairs of second groups; and performing constraint-graph-based compaction of the source layout.

Abstract: A method for circuit layout migration comprises creating a list of layout components in a source layout; determining a plurality of first groups of layout components being regularly aligned horizontally or vertically; determining first subsets of layout components which each belong to at least two of a respective set of determined first groups; determining a plurality of second groups of layout components, each second group comprising mutually exclusive ones of the first subsets of layout components; determining symmetry axes for pairs of second groups; building a constraint graph of the layout components of the source layout using alignment constraints for the alignment of layout components within each of the second groups and distance constraints for preserving a regularity pattern within each of the second groups and symmetry constraints for the determined symmetry axes for pairs of second groups; and performing constraint-graph-based compaction of the source layout.

Abstract: A method for generating an integrated circuit layout is disclosed. One embodiment includes receiving an integrated circuit netlist describing a plurality of transistors and a plurality of conductors for interconnecting the plurality of transistors, each of the plurality of transistors having a width in a layout corresponding to the integrated circuit netlist. More than one of the plurality of transistors are determined to be the widest transistors, all having the same width. One of the widest transistors is folded to produce a folded transistor that is electrically equivalent to the widest transistor. The folded transistor has at least two fingers, each finger having a smaller width than the width of the widest transistors. A fold solution for the layout having the one folded transistor is created.

Abstract: A method for generating an integrated circuit layout is disclosed. One embodiment includes receiving an integrated circuit netlist describing a plurality of transistors and a plurality of conductors for interconnecting the plurality of transistors, each of the plurality of transistors having a width in a layout corresponding to the integrated circuit netlist. More than one of the plurality of transistors are determined to be the widest transistors, all having the same width. One of the widest transistors is folded to produce a folded transistor that is electrically equivalent to the widest transistor. The folded transistor has at least two fingers, each finger having a smaller width than the width of the widest transistors. A fold solution for the layout having the one folded transistor is created.