Bill,
In my opinion, the use of white tin (I'm assuming you're referring to a flat
solderable tin (no specific proprietary blend intended)) in place of gold on
tabs would offer the same properties except for oxide resistence. The tin is
going to oxide very rapidly, long before they will wear out from use. Now
the appearance of the oxide may not be an issue in and of itself; however,
once the oxide begins, electrical failures will follow.
I'm quite confident also, the gold you are currently using is more durable
then the tin finish options I know are available? Have no data to support
this, but I would guess the repeated insertions of tin would be far limited
then with gold.
Franklin D Asbell
----- Original Message -----
From: Ramsey, Guy <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, March 16, 2000 2:00 PM
Subject: [TN] White Tin instead of Gold for edge connectors
> Can we keep this discussion on the net. We are very interested in this
issue
> as well. In fact, Bill may be making these boards for us. The mating
> connectors are gold in one case. In another the mating connector is tin
over
> nickel.
>
> -----Original Message-----
> From: rampinc [mailto:[log in to unmask]]
> Sent: Thursday, March 16, 2000 4:10 PM
> Subject: <No subject given>
>
>
> Bill,
> What is your application of this connector? Assuming it is a card edge
> connector, how
> many insertions are required, what is the connecor insertion force, what
is
> the contact
> geometry and are they using contact lube or not, tin ( white or any other
> shades) may
> cause more problems. Also it is important to keep same plated finish
Au-Au
> or Sn-Sn)
> on both parts ie contact fingers and contact spring.
>
> Please discuss off line if you need more details about contact reliability
> issues
> involved.
>
> Bill Decray wrote:
>
> > CAN ANYONE GIVE ME SOME INFO ON USING WHITE-TIN IN PLACE OF GOLD FOR
> > CONNECTOR FINGERS.
> > MY END USER AS CONCERNS ABOUT THE DURABILITY OF THE TIN FINISH SINCE
THEY
> > ARE PULLING THE CARDS IN AND OUT OF PCI AND MEMORY SLOTS
> >
> > William W. DeCray III
> > Waytec Electronics Corp
> > Sales Engineer
> > PHONE:(804) 237-6391 ext 115
> > FAX: (804) 237-1324
> > E-mail:<[log in to unmask]>
> > Web <http://www.waytec.com>
> > FTP <ftp://ftp.waytec.com>
> >
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