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

Printed Circuit Board Assembly & PCB Design Forum

SMT electronics assembly manufacturing forum.


Peter Lopez


COB's | 28 June, 2000

I trying to find out information on how a normal process will look like with COB's. Questions I'm trying to answer are...

Are SMDs and COBs normally on the same side? If yes, SMDs will be place first then the COB's. Is this assumption true?

How are PCBs normally designed with COB's?

Can anyone suggest some literature on this subject?


Peter L.

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Re: COB's | 29 June, 2000

Peter, There is no truth's about the way things are, How something is done is only bound by who is doing it. You can check the archives for info to get you going but it's all up to you. As far as placement order, it all depends on what you are placing Chip On Board with. Normally placed by a Fine Pitch Placement machine therefor placing them after the majority of parts on the board. No rules, just circumstance. Have Fun!

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