International Business Machines Corporation

Helmut Zudrell

Juergen Koehl

Alexander Albert Woerner

Urich Kranch

Juerge Pilk

The present invention relates to creating a layout of an electronic circuit from a netlist of interconnected components, wherein the components can be represented by planar geometric shapes in the layout. The advantages of the present invention are achieved by tightly coupling placement and routing. An initial placement of shapes of extended size is succeeded by a routing step that tries to create wires between shapes of reduced size. If that fails, it is tried to wire shapes of extended size instead. The wiring can be combined with a delta-placement of shapes within shapes of extended size such that wires connected to shapes of extended size also connect to the shapes.

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Wildberg, Germany

Helmut Zudrell