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SMT electronics assembly manufacturing forum.


SnBi Solder + Dispensable Solder Suppliers

Peter W.

#17505

SnBi Solder + Dispensable Solder Suppliers | 7 September, 2001

I'm looking for a supplier for eutectic SnBi solder paste and dispensible solder paste at class 3, 4 or 5. Has anyone good ideas?

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#17514

SnBi Solder + Dispensable Solder Suppliers | 7 September, 2001

Comments are: * Sn42Bi58 is eutectic at 138�C. Most top-flight paste suppliers will produce it for you. * Bismuth forms an alloy with lead with a melting point of 93�C * Maximum temperature of the solder connection should be less than 100�C during customer use, assuming you don't want to think about that lead alloy thing mentioned above.

How do you plan to use this material?

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Peter W.

#17538

SnBi Solder + Dispensable Solder Suppliers | 10 September, 2001

Thank you for your annotaions. I am aware of the limits and temperatures of that material, but we are doing some research with thermoplastic base materials which won't survive standard solder paste reflow soldering. And beside of using conductive adhesives we are doing tests with all kind of alternatives.

Problem is that there is (at the moment) only one supplier that sells dispensible solder paste, and only at class 2 which is way to coarse.

So, if you have any addresses, especially of european suppliers (not a must), then I would be thankful.

Peter

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#17540

SnBi Solder + Dispensable Solder Suppliers | 10 September, 2001

Not sure of the mesh, but the following are amoung the suppliers that claim to make Sn58Bi paste: http://www.aimsolder.com/ http://www.arconium.com/products/solders.html http://www.cobar.com/PAG00116.HTM

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