>>Majority expressed in what?
>
> Total number of electronic products manufactured to date
> (many now residing in land-fills or entering recycle centers).
> Have a look at most electronic products manufactured for
> consumers say: from 1965 to perhaps a couple of years ago.

My statement was about certain company which sells development tools,
not consumer electronics. Besides, let's take a typical family:
mobiles, mp3 players, computer cards and peripherals (HDD, DVD,
printers, scanners, PSUs etc, etc) modern TVs, digital cameras and
even battery chargers - many dozens PCBs - about all are double or
more sided PCBs. Single sided, I can suggest from the top of my head,
are only some single chip remote controls and some very cheap PSUs.
How am I expected to come to the conclusion that single sided PCBs are
majority?


> Most of those products were manufactured with single-sided
> boards with through-hole components. =A0I'm talking about:
> TV sets (CRT-based), VCR's, radios, portable electronic
> devices such as walkman units, cassette players, radios,
> etc. I've been inside of many of those units - I used to spend
> a LOT of time fixing broken electronics items for friends and
> family back when I had the time and interest.

Yes, I did repairing 494 chip based computer PSUs and CRT-based TV
sets and monitors among other devices. It was not quite rare that
reheating some certain solder joints on that single sided PCBs did the
job.


> I guess that's why I'm asking: cite some references
> (preferably on-line) that I can actually go and examine
> myself.

I doubt there is an extensive info on that topic. The process of
soldering of single sided PCBs is more expensive than that of double
sided PCBs if to be done properly, I believe. And it just take more
single sided PCB room to host the components. The extra cost could
well eat all the "single sided" economy. Just simple concrete maths
and folks are moving to double sided technology.

Regards.

-- =

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