SSETI Express SSETI Express Integration Logbook - Space.aau.dk

Project: SSETI Express
Doc : SSETI Ex press Phase D – Integration Logbook
Phase : Phase D
Date : Started 5 th October 2004
Ref : EXPRESS_D_ESA_Integration_Logbook.doc
Conformal coating
1. Prepare a well ventilated area. NuSil CV 1152 conformal coating is harmful if
inhaled.
2. Clean the appropriate PCB by placing a lint-free tissue over it and then brushing
isopropanol through it onto the board using a stiff wire brush, taking care not to
damage the components.
3. All the isopropanol to dry.
4. Ensure that the PCB is level and stable.
5. Wear a mask to reduce inhalation of fumes.
6. Check with the PCB manufacturer which areas, if any, should be avoided.
7. Open the CV 1152 and pour some into a clean container (like a plastic cup).
8. Close the bottle of CV 1152.
9. Using a small flexible brush apply the conformal coating to the PCB. It is better to
dab it on rather than using broad brush strokes.
10. While you work allow the coating to flow into all the gaps between component legs
etc, it will do so naturally and does not need to be forced.
11. Ensure that a layer of around 1mm thickness is covering the entire board, including
the tops, sides and legs of all components.
12. Place the PCB in a vacuum oven and reduce to the lowest pressure possible. You
will probably see the coating froth and expand slightly as the air is forced out.
13. Once it is flat again, or after about 10 minutes (whichever comes first), slowly,
return the pressure to normal and remove the PCB.
14. Leave the PCB to dry in a well ventilated area for at least 12 hours (preferably 24)
before manipulating it.
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