Reflow soldering workshop

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Reflow soldering workshop
From 2011/12/11 14:00:00 to 2011/12/11 18:00:00
Presenters ({{#arraydefine:p|johannes}}{{#arraysize:p}}warning.png"{{#arraysize:p}}" is not a number.):
johannes
Where:
Whitespace Blekerijstraat 75, Gent, Belgium Loading map... Costs 0
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Reflow soldering workshop not teaching, but testing this technique

tools available

• Aoyue hot-air station
• pizza oven + sparkfun reflow controller
• solder paste
• test circuit boards

Solder profiles and background info

Initial heater test

Programs used

Final program:

0	15s	40°C
1	150s	150°C
2	90s	215°C
3	90s	265°C
4	40s	265°C
5	120s	40°C

Final profile

Comparing this profile to the 'ideal' solder profile, the main difference is that we do not dwell on the 'pre-heat' phase (ie. 150-200°C). This is because we could not get the temperature to rise fast enough, so we were forced to stick to a steady, slow ramp.

Results

The second run of 0603 resistors was a success

Some very fine pitch ICs

The results of the final profile were excellent. The main restriction of this technology is the precise application and dosing of the solder paste, and the placement of the components. We will experiment with using stencils next time. This should improve success rate significantly.

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