There are several types of gaskets. The ones with a continuous ridge along the centerline (inverted V-shape) are not compliant thus they can leave slots and cause difficulties with board insertion. The spiral gaskets make good contact but tend to kink, get caught and fall out of the groove in the panels.
The best ones have a series of rounded clip- like "fingers" along the gasket, allowing each individual contact to comply with the size/shape between two panels. Regarding material, you want to use (plated) beryllium copper. I think the kind that is best is thermally treated after it has been formed. Unfortunately the standard panels are aluminum, which is not best material regarding developing contact resistance to a different gasket material over time, due to galvanic effect/corrosion. Neven > > I am fighting the age old problem of PCI brackets on various PC chassis not > making adequate electrical contact. Aperture leaks, especially at high > frequencies, is a continual problem, to say nothing about the flimsy > construction of the brackets. Has anyone had any success with the clips, > gaskets > and other EMI solutions? If you have any suggestions on types, or > manufacturers > please let me know. > > Thanks in advance... > > Rick Busche > Evans & Sutherland > [email protected] > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
