Hi,=20

I have always made my boards with SMD components on one side and TH
components on the other side. At least 90% of the components are SMD
(the numerical ratio, not the size). I find this very usefull because
the TH components are almost always larger type of components
(connectors, relays, large capacitors, large inductors...) and some
of the SMD components can be placed under the larger TH components to
save board space.

Now I have been thinking of this in terms of cost. Say we have 3
different boards with the same amount and type of components (more
than 90% SMD) and the same size of the board. How would the assembly
cost compare between these boards if they where:

A. SMD and TH components on the same side

B. SMD on one side and TH on the other side

C. About half of the SMD on one side, the rest on the other side and
TH on one side.

Would the cost differences change with different volumes (say 100,
1000 or 10000 boards)?

I am looking for numbers like C would be 75% more expensive than A in
100 volumes and 50% more expensive in 1000 volumes. Or whatever the
numbers are.


Can you even make this comparison without knowing the exact size of
the board and the number and type of components? (Not the component
cost, just the assembly cost).


Thank you

/Ruben

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Ruben J=F6nsson
AB Liros Electronic
Box 9124
200 39 Malm=F6 Sweden
www.liros.se
Tel +46 40142078
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--=20
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