Abstract:
A device comprises a first interconnect structure over a first active device layer, a first power circuit in the first active device layer, a second active device layer over and in contact with the first interconnect structure, a first switch in the second active device layer, a second interconnect structure over and in contact with the second active device layer, a third active device layer over and in contact with the second interconnect structure, a second power circuit in the third active device layer and a third interconnect structure over and in contact with the third active device layer and connected to a power source, wherein the power source is configured to provide power to the first power circuit through the first switch.
Abstract:
A method includes accessing data representing a layout of a layer of an integrated circuit (IC) having a plurality of polygons defining circuit patterns to be divided among a number (N) of photomasks over a single layer of a semiconductor substrate, where N is greater than two. The method further includes inputting a conflict graph having a plurality of vertices, identifying a first and second vertex, each of which is connected to a third and fourth vertex where the third and fourth vertices are connected to a same edge of a conflict graph, and merging the first and second vertices to form a reduced graph. The method further includes detecting at least one or more vertex in the reduced having a conflict. In one aspect, the method resolves the detected conflict by performing one of pattern shifting, stitch inserting, or re-routing.
Abstract:
A method includes accessing data representing a layout of a layer of an integrated circuit (IC) having a plurality of polygons defining circuit patterns to be divided among a number (N) of photomasks over a single layer of a semiconductor substrate, where N is greater than two. The method further includes inputting a conflict graph having a plurality of vertices, identifying a first and second vertex, each of which is connected to a third and fourth vertex where the third and fourth vertices are connected to a same edge of a conflict graph, and merging the first and second vertices to form a reduced graph. The method further includes detecting at least one or more vertex in the reduced having a conflict. In one aspect, the method resolves the detected conflict by performing one of pattern shifting, stitch inserting, or re-routing.
Abstract:
The present disclosure describes an example method for cell placement in an integrated circuit layout design. The method includes retrieving, from a cell library, first and second cells each including a first local metal track proximate to a top boundary and a second local metal track proximate to a bottom boundary. The method includes placing, by a processor, the first and second cells in a layout area including global metal tracks of first and second types. Each global metal track of the first type and each global metal tracks of the second type alternate between one another in the layout area. The first and second local metal tracks of the first cell is aligned with adjacent first global metal track of the first and second types, respectively. The first and second local metal tracks of the second cell is aligned with adjacent second global metal track of the first and second types, respectively.
Abstract:
A method includes operations below. A layout of a circuit is converted to a first conflict graph. A first vertex and a second vertex in the first conflict graph are adjusted based on first data indicating a color patterns assignment for the circuit, in order to generate a second conflict graph, in which the first vertex indicates a first pattern in the layout, and the second vertex indicates a second pattern in the layout. According to the second conflict graph, a first color pattern is assigned to both of the first pattern and the second pattern, or the first color pattern is assigned to the first pattern and a second color pattern is assigned to the second pattern, in order to generate second data for fabricating the circuit.
Abstract:
A method is disclosed that includes the operation below. Vertices in a conflict graph are sorted into a first clique and a second clique, in which the conflict graph corresponds to a layout of a circuit. A first vertex of the vertices is merged with a second vertex of the vertices, to generate a reduced graph, in which the first clique excludes the second vertex, and the second clique excludes the first vertex. A first color pattern of a plurality of color patterns is assigned to a first pattern, corresponding to the first vertex, and a second pattern, corresponding to the second vertex, in the layout according to the reduced graph.
Abstract:
The present disclosure describes an example method for cell placement in an integrated circuit layout design. The method includes retrieving, from a cell library, first and second cells each including a first local metal track proximate to a top boundary and a second local metal track proximate to a bottom boundary. The method includes placing, by a processor, the first and second cells in a layout area including global metal tracks of first and second types. Each global metal track of the first type and each global metal tracks of the second type alternate between one another in the layout area. The first and second local metal tracks of the first cell is aligned with adjacent first global metal track of the first and second types, respectively. The first and second local metal tracks of the second cell is aligned with adjacent second global metal track of the first and second types, respectively.
Abstract:
A partitioning method for partitioning a group of power-ground (PG) cells is disclosed. The method includes: placing at least one out-boundary PG cell on a substrate, wherein power strips of the at least one out-boundary PG cell are aligned with corresponding power rails on the substrate; and placing at least one in-boundary PG cell on the substrate, wherein power strips of the at least one in-boundary PG cell are aligned with corresponding power rails on the substrate.
Abstract:
A partitioning method for partitioning a group of power-ground (PG) cells is disclosed. The method includes: placing at least one out-boundary PG cell on a substrate, wherein power strips of the at least one out-boundary PG cell are aligned with corresponding power rails on the substrate; and placing at least one in-boundary PG cell on the substrate, wherein power strips of the at least one in-boundary PG cell are aligned with corresponding power rails on the substrate.
Abstract:
The present disclosure describes an example method for cell placement in an integrated circuit (IC) layout design. The method includes partitioning a layout area into one or more contiguous units, where each unit includes a plurality of placement sites. The method also includes mapping a first set of pin locations and a second set of pin locations to each of the one or more contiguous units. The method further includes placing a cell in the one or more contiguous units, where the cell is retrieved from a cell library that includes a plurality of pin locations for the cell. The placement of the cell is based on an allocation of one or more pins associated with the cell to at least one of a pin track from the first plurality of pin locations, a pin track from second plurality of pin locations, or a combination thereof.