Patent ID: 6785877
Filing Date: 2004-08-31
Classification: G06F,H01L

Abstract:
A standard cell placement and routing processing system comprising a library file which stores information of various standard cells each of which comprises a power supply terminal of a diffused layer, an input terminal of a first level metal and an output terminal of said first level metal, a circuit connection information file which stores circuit connection information of an LSI to be developed, a constraint information file which stores constraint information concerning the placement and the routing, a parameter file which stores parameter information including a power supply voltage and an operating frequency of said LSI to be developed and a sheet resistance of said diffused layer, a placement and routing system for executing the placement and the routing of standard cells selected in accordance with the circuit connection information from said circuit connection information file, by utilizing information from said library file, said constraint information file and said parameter file, and an input/output and display apparatus for displaying a history and a result of the placement and the routing and for externally inputting a control command to control said placement and routing system;wherein said placement and routing system detects a signal line which becomes a hindrance in reducing the resistance of a power supply line, removes said signal line, and locates a connection path between said first level metal and a second level metal at an end position to which the removed signal line was connected.