Hi Kay,

You wrote
> We are certainly requesting various temporary exemptions, in particular for
> high lead high temperature solders. If you have evidence of applications
> where high lead solders are required and adhesives are not a suitable
> alternative then please let me know.

I've got this one (I told the full story June 22 on this mailing
list)

Burn-In-Board IC sockets for temperatures 200 degree Celsius and
higher over 5000 to 10000 hours. Sockets are made with Pfinodal from
Ametek. This alloy consists of 15% Ni, 8 % Sn, 77 % Cu. If you solder
these sockets with a solder containing more than 10 % Sn, the tin
diffuses during the first 20 hours @ 200 degree Celsius in the
Pfinodal. The Pfinodal becomes brittle and the sockets fall off the
board.

Ametek recommends urgently for high temperature applications
solders like 10 % Sn, 88 % Pb, 2 % Ag or other solders with less Sn.

If there is no exemption, then I cannot supply this customer any more
with these boards and I have no idea about any replacement without
lead which would not increase the costs with factor 10 (ceramic
boards, stainless steel sockets, welded, not soldered, and all custom
made...:-(   )
-----------------------------------------------
Matthias Mansfeld Elektronik
* Printed Circuit Board Design and Assembly
Am Langhoelzl 11, D-85540 Haar, GERMANY
Phone: +49-89-4620 0937, Fax: +49-89-4620 0938
E-Mail: [log in to unmask]
Internet: http://www.mansfeld-elektronik.de

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