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Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Sir's can anyone help me..need advise

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#65141

Sir's can anyone help me..need advise | 30 September, 2011

Sir's We encountering problem regarding HEATSEAL machine we have issue such as LEADFLOAT , OPEN, BRIDGE/SHORTED..can you help me by giving me some advise..

Badly needed you expertise on this...THANK YOU

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#65165

Sir's can anyone help me..need advise | 4 October, 2011

We'd like to help you, but we don't have a clue of what you're talking about. * Which 'heatseal' machine are you using? Is that a reflow soldering machine? See, we think of a heatsealing machine as one that bond the two sides of a plastic bag together * Traditionally, 'LEADFLOAT , OPEN, BRIDGE/SHORTED' are soldering defects

So that we can help, here's what you need to do to help us understand your situation better. Describe: * Defect, defect rate, breadth, scope etc. * Process machine and settings * Process materials: solder alloy, board soldermask, board solderability protection, etc * Pictures * All the other stuff you know

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#65173

Sir's can anyone help me..need advise | 4 October, 2011

Sir

*We are using "HOT BAR SOLDERING" we are bonding "FFC" and "PCB" at 0.5mm pitch. Machine settings: Heating Temp. 310º, Colling Temp. 190º Delay Time 1sec We also using "BECKLITE" as Soldering Jig that can resist up to 400º.

We are using 1 is to 1 meaning 0.5mm PCB pad and 0.5mm FFC pad @ 0.5mm pitch using also .10 Metal mask Hieght.

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#65180

Sir's can anyone help me..need advise | 6 October, 2011

Denmark, it looks that you really have a problem. You just don't tell us what is it.

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#65193

Sir's can anyone help me..need advise | 7 October, 2011

Questions are: * Pressure? * Heating ramp? * Solder alloy? * Solder preform or paste reflow? [We have more, depending on your answer] * 0.5 mm is pretty tight. Talk about tooling holes and measures to prevent flexing of the assembly * In time, heat and pressure deform the electrodes. Talk about tip dress control and maintenance

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