Patent · US Active

Using port obscurity factors to improve routing

US8418110B2 · kind B2 · utility

12Cited by

3References

10Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Joachim Keinert · Altdorf, DE
Thomas Ludwig · Sindelfingen, DE

Key dates

Filing date	Sep 2, 2010
Grant date	Apr 9, 2013
Priority date	—
Expiry date	Feb 4, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG06F30/394
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An integrated circuit characterized by a netlist may be routed using a routing priority list that may be created using port obscurity factors. A port obscurity factor may indicate how difficult it may be to route to that port and may be calculated as being inversely proportional to the number of routing tracks that may be connectable to that port. Routing priorities for the nets of the netlist may then be created using the port obscurity factors of the ports in the net. Routing may then be done in the order determined by the routing priority list and the generated layout information stored in a computer useable medium. In some cases, routing may be performed using multiple routing passes where a new routing priority list may be calculated for each routing pass.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.