If you use gold/tin-lead there could be a galvanic reaction which will
cause
corrosion.  If the connector is gold plated then I would recommend using a
gold
plated edge connector.

Ken





 (Embedded
 image moved   Matthew Lamkin
 to file:      <[log in to unmask]>
 pic27215.pcx) 05/13/99 09:15 AM




To:   [log in to unmask]
cc:    (bcc: Kenneth Kirby/ElectrovertUS/Cookson)
Subject:  [TN] Tin>Gold Versus Gold>Gold contacts?




HI there guys,
I wonder if someone could give me some basic metallurgy type advise.

I have laid out a board that has edge connector fingers on one side.
It is to plug into a connector that has some gold plated fingers on it.

I would like the PCB to have gold plating on the edge connectors &
others would like it to
be just HASL coated (as its far cheaper).

The question is... how well do gold plating & tin/lead plating fare?
Is this connection likely to corrode or will they exist in harmony ok.

Also will a very dry atmosphere cause any problems to these connections?

Thanks in advance - Matt
T.T.F.N

Matthew Lamkin
Printed Circuit Board Draughtsman
Protec Fire Detection PLC
Churchill Way,
Nelson, Lancs
BB9 6RT.
England U.K.
Tel 01282 717393
Fax 01282 717273
Email = [log in to unmask]

Company Web Site = http://www.protec-fire-detection.plc.uk










T.T.F.N

Matthew Lamkin
Printed Circuit Board Draughtsman
Protec Fire Detection PLC
Churchill Way,
Nelson, Lancs
BB9 6RT.
England U.K.
Tel 01282 717393
Fax 01282 717273
Email = [log in to unmask]

Company Web Site = http://www.protec-fire-detection.plc.uk

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