Abstract:
A method and a corresponding system for analyzing process variation and parasitic resistance-capacitance (RC) elements in an interconnect structure of an integrated circuit (IC) are provided. First descriptions of parasitic RC elements in an interconnect structure of an IC are generated. The first descriptions describe the parasitic RC elements respectively at a typical process corner and a peripheral process corner. Sensitivity values are generated at the peripheral process corner from the first descriptions. The sensitivity values respectively quantify how sensitive the parasitic RC elements are to process variation. The sensitivity values are combined into a second description of the parasitic RC elements that describes the parasitic RC elements as a function of a process variation parameter. Simulation is performed on the second description by repeatedly simulating the second description with different values for the process variation parameter.
Abstract:
A method comprises: selecting a circuit pattern or network of circuit patterns in a layout of an integrated circuit (IC) to be fabricating using double patterning technology (DPT). Circuit patterns near the selected circuit pattern or network are grouped into one or more groups. For each group, a respective expected resistance-capacitance (RC) extraction error cost is calculated, which is associated with a mask alignment error, for two different sets of mask assignments. The circuit patterns in the one or more groups are assigned to be patterned by respective photomasks, so as to minimize a total of the expected RC extraction error costs.
Abstract:
The present disclosure relates to methods and apparatuses for generating a through-silicon via (TSV) model for RC extraction that accurately models an interposer substrate comprising one or more TSVs. In some embodiments, a method is performed by generating an interposer wafer model having a sub-circuit that models a TSV. The sub-circuit can compensate for limitations in resistive and capacitive extraction of traditional TSV models performed by EDA tools. In some embodiments, the sub-circuit is coupled to a floating common node of the model. The floating common node enables the interposer wafer model to take into consideration capacitive coupling within the interposer. The improved interposer wafer model enables accurate RC extraction of an interposer with one or more TSVs, thereby providing for an interposer wafer model that is consistent between GDS and APR flows.
Abstract:
The present disclosure relates to a method of RC extraction that provides for a fast development time and easy maintenance. In some embodiments, the method provides a graphical representation of an integrated chip layout having a plurality of integrated chip components. A plurality of pattern based graphical features are then determined. Respective pattern based graphical features define a structural aspect of an integrated chip component. One of the plurality of integrated chip components is defined as a pattern oriented function having inputs of one or more of the pattern based graphical features. The pattern oriented function determines a shape of the one of the plurality of integrated chip components based upon a relation between the plurality of inputs. By determining a shape of an integrated chip component using a pattern oriented function, the complexity of RC profiles can be reduced.
Abstract:
A method and a corresponding system for analyzing process variation and parasitic resistance-capacitance (RC) elements in an interconnect structure of an integrated circuit (IC) are provided. First descriptions of parasitic RC elements in an interconnect structure of an IC are generated. The first descriptions describe the parasitic RC elements respectively at a typical process corner and a peripheral process corner. Sensitivity values are generated at the peripheral process corner from the first descriptions. The sensitivity values respectively quantify how sensitive the parasitic RC elements are to process variation. The sensitivity values are combined into a second description of the parasitic RC elements that describes the parasitic RC elements as a function of a process variation parameter. Simulation is performed on the second description by repeatedly simulating the second description with different values for the process variation parameter.
Abstract:
A method includes creating a technology file including data for an integrated circuit including at least one die including at least one metal layer to be formed using at least one of a single patterning process or a multi-patterning process, creating a netlist including data approximating at least one of capacitive or inductive couplings between conductors in the metal layer of at least one die based on the technology file, simulating a performance of the integrated circuit based on the netlist, adjusting the routing between the at least one die and the interposer based on the simulation to reduce the at least one of the capacitive or the inductive couplings, and repeating the simulating and adjusting to optimize the at least one of the capacitive or inductive couplings.
Abstract:
The present disclosure relates to methods and apparatuses for generating a through-silicon via (TSV) model for RC extraction that accurately models an interposer substrate comprising one or more TSVs. In some embodiments, a method is performed by generating an interposer wafer model having a sub-circuit that models a TSV. The sub-circuit can compensate for limitations in resistive and capacitive extraction of traditional TSV models performed by EDA tools. In some embodiments, the sub-circuit is coupled to a floating common node of the model. The floating common node enables the interposer wafer model to take into consideration capacitive coupling within the interposer. The improved interposer wafer model enables accurate RC extraction of an interposer with one or more TSVs, thereby providing for an interposer wafer model that is consistent between GDS and APR flows.
Abstract:
A method generally comprises arranging a plurality of layer combinations into a plurality of groups such that each of the layer combinations is assigned to at least one group. A shifting analysis is performed on a plurality of benchmark circuits for each of the groups. At least one tuning vector value is calculated based, at least in part, on a plurality of criteria vectors of the benchmark circuits. A shift is applied on each of the groups by the tuning vector value and a technology file, such as a 2.5 dimensional RC techfile, is regenerated.
Abstract:
A portion of a layout of a single layer of an integrated circuit is to be multi-patterned. The patterns are divided into first and second groups, to be patterned on the single layer by a first mask or a second mask. For each portion of each pattern, a spacing relationship is determined between that portion and any adjacent pattern on either or both sides. A processor computes a first capacitance (C), resistance (R), or resistance-capacitance (RC) cost of assigning the first group to the first mask and the second group to the second mask, and a second cost of assigning the first group to the second mask and the second group to the first mask, based on the spacing relationships. The first group is assigned to the first mask and the second group to the second mask if the first cost is lower than the second cost.
Abstract:
The present disclosure relates to a method of RC extraction that provides for a fast development time and easy maintenance. In some embodiments, the method provides a graphical representation of an integrated chip layout having a plurality of integrated chip components. A plurality of pattern based graphical features are then determined. Respective pattern based graphical features define a structural aspect of an integrated chip component. One of the plurality of integrated chip components is defined as a pattern oriented function having inputs of one or more of the pattern based graphical features. The pattern oriented function determines a shape of the one of the plurality of integrated chip components based upon a relation between the plurality of inputs. By determining a shape of an integrated chip component using a pattern oriented function, the complexity of RC profiles can be reduced.