EDA > General PCB/EDA/CAD Discussions

Reducing costs!

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pirulo123:
Hi All,

Well here's the thing my PCB must fit inside a 6x6 inch ~ (15x15 cm) enclosure, but in reality the electronics are very high density and they don't need that much real state the problem is that all the unused space means I'm trowing money away, normally this would be too much but the design I'm working on has 6 copper layers and It makes a BIG difference vs a 2 layer board.
I thought about make the primary high density board sit on top of a cheaper 2 layer board by means of male-female connector and a pair of screws to fix it in place, but I'm not convinced...

Is this a good idea ? does it make any sense to any of you ? what sort of bad things could happen ?

Oh boy I don't want to see their faces when I show them the stacked pcb's...  I'm out of ideas....

Regards.
Pirulo

joelby:
Can't you just mount the PCB in one corner? Or does it slide into the case on a runner and have to be a fixed width? In that case, can't the depth be reduced arbitrarily?

ejeffrey:
If you can't just move the mounting points to reduce the board size I think your idea is best. Unless the carrier needs to mate with a card edge connector or otherwise carry electrical signals you can even just use a piece of perf board.  No connectors needed, just some standoffs and a few screws.


--- Quote ---Oh boy I don't want to see their faces when I show them the stacked pcb's...  I'm out of ideas....

--- End quote ---

Is this for something intended to be mass produced?  In that case make sure your savings in PCB fab outweigh the extra assembly costs.

Simon:
yes we need more information

mikeselectricstuff:

--- Quote from: ejeffrey on July 07, 2011, 07:54:40 am ---If you can't just move the mounting points to reduce the board size I think your idea is best. Unless the carrier needs to mate with a card edge connector or otherwise carry electrical signals you can even just use a piece of perf board.  No connectors needed, just some standoffs and a few screws.


--- Quote ---Oh boy I don't want to see their faces when I show them the stacked pcb's...  I'm out of ideas....

--- End quote ---

Is this for something intended to be mass produced?  In that case make sure your savings in PCB fab outweigh the extra assembly costs.

--- End quote ---
But bear in mind that PCB size also affects assembly costs due to the number of boards that will go on a panel.
Using a  high density sub-board is a perfectly reasonable approach if it needs to be big for mechanical reasons. Might long and thin be another option?

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