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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Michael Peart

#13439

Punched vs, Routered PCB's | 19 November, 1998

We are investigating purchasing boards off-shore (Topsearch). Part of their process is to punch the matrix instead of router them. These boards are mixed technology. Is anyone aware of difficulity processing punched boards? Thanks, Mike

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Earl Moon

#13440

Re: Punched vs, Routered PCB's | 19 November, 1998

| We are investigating purchasing boards off-shore (Topsearch). Part of their process is to punch the matrix instead of router them. These boards are mixed technology. Is anyone aware of difficulity processing punched boards? | Thanks, | Mike | Big tooling charges to make dies. Not to be used with MLB's of any sophistication. Used mostly with "cheap and dirty" PCB's, etc.. Re-sharpen or re-tool dies as required.

Earl Moon

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Kallol Chakraborty

#13441

Re: Punched vs, Routered PCB's | 22 November, 1998

| | We are investigating purchasing boards off-shore (Topsearch). Part of their process is to punch the matrix instead of router them. These boards are mixed technology. Is anyone aware of difficulity processing punched boards? | | Thanks, | | Mike | | | Big tooling charges to make dies. Not to be used with MLB's of any sophistication. Used mostly with "cheap and dirty" PCB's, etc.. Re-sharpen or re-tool dies as required. | | Earl Moon | I completely agree with Earl. But I am not sure if you are talking about flex, rigid or rigid/flex combo . Usually for flex, most of the time we have no choice but to use die which is very expensive to re-sharpen (potential failure mode - dimension tol., special space, rev control required for the die itself ).

For MLB it could cause severe edge delamination /separation and is very hard to punch over 60 mil thick > 3 lyr with gnd /pwr plane (most of the mixed has sheilding). I guess I am just repeating what Earl has said earlier.

It would be nice to ask them for sub-ing it out for scoring as sometimes it is hard to route (SS or DS). I am pretty sure that there are a lot of scoring / routing house who could do a pretty good job and charge dirt cheap at the same time. Also depending on the capacity and need, you could ask them to buy any one of them - Accuscore for scoring or a used routing machine -

Hope that helps Kc.

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Reflow Ovens thermal process improvement