Routing method using a CAD tool
AssigneeKawasaki Microelectronics, Inc.
InventorAkira Takeda
Life of this patent
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Abstract
In a routing method of the present invention, the load of a CAD tool can be reduced and signal lines can be easily shielded by using the CAD tool with the reduced load. By using existing power-supply/ground lines as shield wiring, a specific signal line to be protected against crosstalk is provided while being shielded. A program related to grid definition in the existing CAD tool is changed so as to dispose each grid line between the power-supply and ground lines, and then shield wiring of the specific signal line is performed. Then, another signal line is freely provided in a routing area or routing layer.
Claims6
A routing method using a CAD tool, comprising the steps of:
- defining a routing grid a plurality of times;
- routing a signal line in accordance with a first-defined grid;
- and
- routing another signal line in accordance with a second-defined grid.
A routing method using a CAD tool, comprising the steps of:
- arranging power-supply and ground lines in a mesh pattern in a layout area, every two lines of the power-supply and ground lines having a space for a line therebetween;
- routing a signal line between the power-supply and ground lines;
- and
- routing another signal line between the power-supply and ground lines or in another part of the layout area.
Dependencies are inferred from the claim text.