Printed Circuit Board Assembly & PCB Design SMT Electronics Assembly Manufacturing Forum

Printed Circuit Board Assembly & PCB Design Forum

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Billboarding 0603 resistors

MarkQ

#18873

Billboarding 0603 resistors | 15 February, 2002

I have some billboarding 0603's and I'm trying to find potential causes. Small boards 2"X 3". .060"thk Hasl surface.

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#18884

Billboarding 0603 resistors | 18 February, 2002

Never heard of billboarding. Could you please explain what that means according to 0603�s.

Headshaking Wolfgang

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JAX

#18886

Billboarding 0603 resistors | 18 February, 2002

Wolfgang, Billboarding is kinda like a tombstone. The part is just sitting on it's side instead of on it's end. There should be plenty of info on this in the archives under billboard and tombstone. Most likely cause is off center placement and oven profiles. That's just my opinion, I could be wrong!

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mantis

#18900

Billboarding 0603 resistors | 18 February, 2002

Yep i agree most likely misplacment or reflow, maybe check your air flow around the liquidous zones(if convection oven) probably too low.

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stimpman

#18951

Billboarding 0603 resistors | 22 February, 2002

Hi, Have you checked your placements pre-reflow? The most typical cause of a billboard unlike tombstoning is a pick and place issue. Billboarding will usually happen with ( profile/bad pad layout and the most common just poor center placement. I've seen Billboarding happen with feeders out out of cal ( advancement) and the nozzle will pick the part up to close to its edge causing it to tip up. Of course it an be many other things , but that is a quick fix. You would think your PD (vision info would reject it, but not always!!!! And thats on all brands of equipment.

Kevin

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#18954

Billboarding 0603 resistors | 22 February, 2002

Check the pick position of the component from the feeder, the feeder advancement speed, the type of feeder tape, static interference, and the cavity tolerance or slope of the carrier tape.

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