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Step by Step Reflow Soldering 

1. About to start solder paste application
Image copyrights - AHARS Inc / VK5HSE ../images/01_reflowsoldering.jpg

2. Solder paste application underway
Image copyrights - AHARS Inc / VK5HSE ../images/02_reflowsoldering.jpg

3. Fine pitched devices get a thin strip of solder paste
Image copyrights - AHARS Inc / VK5HSE ../images/03_reflowsoldering.jpg

4. Solder paste all done ready for SMDs
Image copyrights - AHARS Inc / VK5HSE ../images/04_reflowsoldering.jpg

5. Placing the last of the SMDs
Image copyrights - AHARS Inc / VK5HSE ../images/05_reflowsoldering.jpg

6. Control Board SMDs all in position
Image copyrights - AHARS Inc / VK5HSE ../images/06_reflowsoldering.jpg

7. Deploy the reflow soldering jig and hotplate
Image copyrights - AHARS Inc / VK5HSE ../images/07_reflowsoldering.jpg

8. Solder paste has gone grey and liquid
Image copyrights - AHARS Inc / VK5HSE ../images/08_reflowsoldering.jpg

9. Partially reflowed, some pads shiny, some still grey
Image copyrights - AHARS Inc / VK5HSE ../images/09_reflowsoldering.jpg

10. Everything reflowed lift jig gently prop up on a box
Image copyrights - AHARS Inc / VK5HSE ../images/10_reflowsoldering.jpg

11. Hotplate moved out of the way to let things cool
Image copyrights - AHARS Inc / VK5HSE ../images/11_reflowsoldering.jpg

12. Reflowing done, minor touch up of bridging x2 done
Image copyrights - AHARS Inc / VK5HSE ../images/12_reflowsoldering.jpg