Riser card local EMI shield for a computer chassis
US6542384B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 14, 2001 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Dec 14, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K3/366
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A shielded riser card assembly for reducing electromagnetic radiation from a computer enclosure is disclosed. The riser card assembly comprises a four-layer riser card having a connector adjacent its lower edge, such as a connector for an NLX system board. A cable connection socket is on the riser card a first distance away from the connector, and a plurality of traces on a surface of the riser card run between the cable connection socket and the connector. A sheet of conductive material covers the plurality of traces and is spaced a second distance apart from the surface of the riser card. At least one fastener connected is to the sheet and attached to the riser card. The fastener conductively connects the sheet of conductive material to a ground layer of the riser card. A plurality of non-conductive spacers are disposed between and in contact with both of the sheet and the riser card, for maintaining the sheet a predetermined distance away from the riser card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.