Dwayne Reid wrote:
> There has to be billions of circuit boards
> that have been manufactured that consist
> of wire leads pushed through holes and
> soldered. =A0Many of those are double-sided
> boards with plated-through-holes but I'd
> bet that the majority of those boards are
> single-sided with NO plated-through-holes.

Majority expressed in what?
- just number of items;
- total square inches;
- total sold in US$;
- total income generated;
I'd like to see the numbers (and we should keep in mind we are talking
about PCBs targeting professional market).


> PS - I suppose that some of the modern
> LED lighting assemblies that I am now
> seeing are manufactured all wrong as well.
> Those consist of 4 small PCBs assembled
> into a square shape, with another PCB
> soldered across the end of the box thus
> formed by the 4 PCBs. =A0All connections are
> solder bridges from one PCB to another.

That's a good point.

- First, your example is a device to just display something. A short
set of, say, 1 ms signal bounces won't hurt user experience. But such
bounces may not be welcome on other logic, for instance on sync lines.

- Second, that PCB copper lines are not that thick as the component
pins, thus they would cause less shear stress to the solder layer.
(But in this case you, probably, would need a PCB with good resin
layer between the PCB itself and the copper layer)

Regards.

-- =

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