Thanks Djula,

Exactly what I am looking for.

So, board size doesn't affect assembly price?

Interesting to note that the addition of SMT on 2 sides is cheaper than the
addition of Lead free. I thought Lead free was more or less standard nowada=
ys.

What is the "No of SMT Pads (optional)" for? It doesn't seem to change the
price.

No. of through hole placement doesn't care about number of pins? What if I =
have
10 TH 164 pin PCI connectors?

How are the majority of boards done? A, B or C or any other according to my
text below?


/Ruben


> Ruben,
>=20
> We are contract manufacturers in Serbia. The answer to your question=20
> depends on the quantity of boards and the technology used, I am talking=20
> here about 10000 units or less:
>=20
> If you use SMD on both sides, that requires one extra stencil, and one=20
> extra process through the SMD line - that will definitively be more=20
> expensive.
>=20
> TH is more difficult to assess - if you keep TH and SMD on one side, TH=20
> can be wave soldered and the cost for manufacturer will be minimized.=20
> With SMD and TH on different sides, the TH pads will be between SMD=20
> components and that is extra work - you have to solder TH manually or=20
> with selective soldering.
>=20
> However, western (more expensive) manufacturers don't have time to=20
> calculate this for each order so for smaller runs they just average out=20
> the costs and you will get the same price regardless of job difficulty.
>=20
> We are collaborating with a company that sells PCBs and membrane keypads=
=20
> and we have a calculator that went online a few days ago, you can play=20
> with it to see what prices you get:
>=20
> http://www.accredologistics.com/
>=20
> The site is ugly and the calculator may have bugs especially at=20
> extremely small or large inputs but try it out, questions and comments=20
> are most welcome!
>=20
> Djula
>=20
>=20
>=20
> On 12.11.2013 9:40, Ruben J=F6nsson wrote:
> > Hi,
> >
> > 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
> >


=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
Ruben J=F6nsson
AB Liros Electronic
Box 9124
200 39 Malm=F6 Sweden
www.liros.se
Tel +46 40142078
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.