Rudy Shubert at Bellcore did considerable published work, ca. late
1980's early 1990's, on fretting corrosion of Au/Au (the best),
Au/Sn (the worst) and Sn/Sn (pretty good) contacts. I have the
reference somewhere, but I'd have to dig pretty deep to retrieve it.

I don't know if this is a particular problem with SIMM's, but it
can lead to high contact resistances with pcb finger contacts
in high-vibration environments, and hence electrical unreliability.

----------
> From: Lee McCuistion <[log in to unmask]>
> To: [log in to unmask]
> Subject: [TN] Mating Tin / Gold; SIMMs and sockets
> Date: Tuesday, February 24, 1998 5:01 AM
>
> Ok,
> Who has some technical details, study, or white paper on the validity
> of, or problems with mating tinned fingered SIMMs with gold contact
> sockets or visa-versa?  Does this really have any effect on
> reliability?
>
> Lee McCuistion
> Manufacturing Engineer
> Cubix Corporation
> 2800 Lockheed Way
> Carson City, NV  89706
> 702-888-1000 x237 (voice)
> 702-888-1002 (fax)
> [log in to unmask] (e-mail)

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