Add-in card edge-finger design/stackup to optimize connector performance
US6710266B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2002 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Jul 26, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/09309
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A technique to simultaneously reduce high-frequency insertion loss and cross-talk for a multi-layered add-in card is disclosed. The technique is based on selective removal of ground and power planes beneath the edge fingers. This selective removal of power and ground planes removes excess capacitance at the edge fingers, lowering the insertion loss at high frequencies, while maintaining an impedance match with an associated connector. Simultaneously, the leftover metallic ground/power plane provides electromagnetic shielding and thus reduces the cross-talk between the differential pairs. Optimum performance of the connector with minimized insertion loss and cross-talk can be obtained for high-speed analog and digital applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.