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BGA reflow soldering using vapor phase

I am doing some initial research regarding PCB design process with a Spartan3E (FT256) .. Have i understood it correctly that avnet are the only distributor of xilinx FPGA=B4s ? .. in that case, i can order a Spartan3E witch is not lead free .. and here comes the problem -> we have vapor phase equipment to solder the BGA on the PCB. This vapor phase machine uses liquid which reach 240degrees (Pb-free soldering), will this damage the non-Pb-free FPGA? If it does, i have to convince some ppl to buy some other liquid with lower vapor temperature :/

I have read the Device Package Userguide (ug112), regarding the Reflow soldering process .. it dosent address the vapor phase process but i guess its the same as for a normal oven process? .. is it critical to obey the ramp temperature requirements?

Regards Kim

Reply to
kislo
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there are several suppliers, not only avnet, so try push all of them to get pb-free versions

vapor thing is almost the ONLY thing suitable for BGAs, so if you have that equipment be happy.

for best results the correct temperature profile is sure required, but i guess your assembly department will know about that.

you possible can use the pb-free profile for pb package too, at least for the development boards

Antti

Reply to
Antti

We had only 50% yield with that approach recently, albeit not with an FPGA.

Kolja

Reply to
comp.arch.fpga

Hi,

if need prototypes quickly the 50% is fully acceptable, thats why i suggested i guess there actual yield depends on many factors as the package type and moisture, etc..

Antti

Reply to
Antti

The original premise behind this question is incorrect.

1) Avnet is only one of several distributors that sell Xilinx parts. Your posting address indicates that you are located in Denmark and Silica (an Avnet company) is the only local distributor. Nu Horizons has offices in Germany and the UK.

2) The Spartan-3E family is available in both lead and PB-free packages. Simply order the FTG256 (instead of the FT256) to get the PB-free package version.

Ed McGettigan

-- Xilinx Inc.

Reply to
Ed McGettigan

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