Title:
集積回路デバイス内のルーティングの容量性と誘導性の両方の信号結合効果を除去するための給電および接地シールド・メッシュ
Document Type and Number:
Japanese Patent JP2005524231
Kind Code:
A
Abstract:
A power and ground shield mesh to remove both capacitive and inductive signal coupling effects of routing in integrated circuit device. An embodiment describes the routing of a shield mesh of both power and ground lines to remove noise created by capacitive and inductive coupling. Relatively long signal lines are routed in between fully connected power and ground shield mesh which may be generated by a router during the signal routing phase or during power mesh routing phase. Leaving only the odd tracks or the even tracks for signal routing, power mesh (VDD) and ground mesh (VSS) are routed and fully interconnected leaving shorter segments and thereby reducing the RC effect of the circuit device. Another embodiment presents a technique where the signals are shielded using the power and ground mesh for a gridless routing. Another embodiment presents a multi-layer grid routing technique where signals are routed on even grid and the power and ground lines are routed on odd grid. A similar embodiment represents grid routing technique where the signals are routed between layers N and N+1. Another embodiment enables signals to be shielded by opposite power and ground grids on left, right, top and bottom. Additional embodiments also include utilization of similar mesh utilized in standard cell and/or in the gate array routing area or any other area where any other signal line is to be shielded.
Inventors:
Ho, Iu-Men Tom
Application Number:
JP2004500331A
Publication Date:
August 11, 2005
Filing Date:
July 29, 2002
Export Citation:
Assignee:
Simplicity, Inc.
International Classes:
H05K9/00; H01L21/82; H01L21/822; H01L23/522; H01L27/04; H01L27/118; (IPC1-7): H01L21/82; H01L21/822; H01L27/04; H05K9/00
Attorney, Agent or Firm:
Masaki Yamakawa
Shigeki Yamakawa
Shigeki Yamakawa