P
Pimpom
There's no quick and easy way to order a PCB from where I live
and I make most of my own. For major projects, I persuade local
silk-screen printers to print the solder mask on. For minor ones,
to protect the finished copper areas, I either tin them with
solder or use the old method of painting it over with rosin.
Unless I do this, the bare copper gets visibly tarnished in a
matter of days.
However, when working on years-old company products, I often see
unused solder pads that are still fairly clean and bright and
take solder readily. And I don't mean the gold-plated ones.
What's the trick? If they are covered with an anti-oxidation
coating, it must be quite thin and transparent.
and I make most of my own. For major projects, I persuade local
silk-screen printers to print the solder mask on. For minor ones,
to protect the finished copper areas, I either tin them with
solder or use the old method of painting it over with rosin.
Unless I do this, the bare copper gets visibly tarnished in a
matter of days.
However, when working on years-old company products, I often see
unused solder pads that are still fairly clean and bright and
take solder readily. And I don't mean the gold-plated ones.
What's the trick? If they are covered with an anti-oxidation
coating, it must be quite thin and transparent.