Patent · US Active

Reducing noise coupling in high speed digital systems

US8084692B2 · kind B2 · utility

0Cited by

5References

3Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Moises Cases · Austin, US
Bradley D. Herrman · Cary, US
Kent B. Howieson · Austin, US
Erdem Matoglu · Austin, US
Bhyrav M. Mutnury · Austin, US
Pravin Patel · Cary, US
Nam H. Pham · Round Rock, US
Caleb J. Wesley · Winston-Salem, US

Key dates

Filing date	Oct 25, 2007
Grant date	Dec 27, 2011
Priority date	—
Expiry date	Sep 29, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T156/1013
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An apparatus having reduced noise coupling includes a core layer having an upper and lower surface, the upper and lower surface each including a copper sheet layer, a pre-preg layer having an upper surface and a lower surface, the upper surface of the pre-preg layer coupled to the lower surface of the core layer, a core insulating layer having an upper surface and a lower surface, the upper surface of the core insulating layer coupled to the lower surface of the pre-preg layer, a return current reference layer disposed on the lower surface of the core insulator layer and high-speed signal traces disposed on the upper surface of the core insulating layer, each of the high speed signal traces disposed on a pedestal defined by a section of the pre-preg layer and the core insulating layer, each pedestal being separated by an air gap disposed between adjacent pedestals.

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