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Method and apparatus for performing power routing on a voltage island within an integrated circuit chip

A technology of integrated circuits and voltage islands, applied in the field of integrated circuit design

Inactive Publication Date: 2008-10-29
IBM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Problems to be overcome include: how not to require excessive supply conductors to anticipate the power requirements of unselected voltage islands, how not to limit the placement of power service terminals that are included in voltage island circuits due to local sparse power grids, how to avoid electromigration and IR Drop Violations, and How to Avoid Blocked Pins and Other Routability Issues

Method used

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  • Method and apparatus for performing power routing on a voltage island within an integrated circuit chip
  • Method and apparatus for performing power routing on a voltage island within an integrated circuit chip
  • Method and apparatus for performing power routing on a voltage island within an integrated circuit chip

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Embodiment Construction

[0014] With reference to the accompanying drawings and in particular to figure 1 , which depicts a schematic of an integrated circuit chip with voltage islands upon which a preferred embodiment of the invention is implemented. As shown, the integrated circuit chip 10 includes a voltage island 5 . Voltage island 5 includes the slave chip VDD g VDD provided by power grid 12 g Power grid 11, GND power grid 13 provided from chip GND power grid 14, from on-chip VDD i -VDD n VDD provided by power grid 16 i -VDD n Power grid 15, and (optionally) GNDi-GNDn power grid 17 provided from on-chip GNDi-GNDn power grid 18. The voltage island 5 also includes power service terminals (PSTs) 19 for powering the circuits and devices contained in the voltage island. PSTs19 must be connected to VDDg, VDD i -VDD n and GND.

[0015] Although in figure 1 Medium VDD g Power Grid 11, GND Power Grid 13 and VDD i -VDD n The power grid 15 is represented as a power ring, but those skilled in t...

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Abstract

A method for performing power routing on a voltage island within an integrated circuit chip is disclosed. A first power grid (31) is generated for a voltage island on metal levels 1 to N-1. Then a second power grid is generated on metal levels N and above (32). A bounding region of the second robust power grid is determined (33). Finally, the shortest distance connections from a set of power sources is routed to the second power grid (34).

Description

technical field [0001] The present invention relates generally to integrated circuit design, and more particularly to methods and apparatus for distributing power in integrated circuits with voltage islands. Still more particularly, the present invention relates to methods and apparatus for performing power supply routing on voltage islands within integrated circuits. Background technique [0002] The concept of voltage islands is introduced into integrated circuit design to integrate multiple design techniques on the same integrated circuit chip in a way that improves performance and reduces power consumption. The voltage island concept allows one or more parts (islands) of an integrated circuit chip to be powered by a chip-wide power supply (VDD g ) and other voltage island supplies (VDD i -VDD n ) Both supply power. VDD g and VDD i -VDD n It can be connected and disconnected according to the working requirements of the integrated circuit. Typically, VDD g and VDD...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50H01L23/528
CPCG06F17/5077H01L23/5286G06F30/394H01L2924/0002H01L2924/00H01L23/52
Inventor 陈兵斯科特·W.·古尔德马克·K-J.·徐帕特里克·M.·赖安埃里克·C.·斯查泽巴奇
Owner IBM CORP
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