Screaming Circuits: PCB Finishes

PROTOTYPE AND SMALL VOLUME
PCB ASSEMBLY MADE EASY

Gold Fever

We call it Gold Fever. It's when you've got a hankerin to have a nice flat surface to put that BGA on and the lust for that precious metallic surface turns into an obsession. It's all you can think of.... Read more

And Another Reason...

Another reason to inspect your PCBs before sending them on to the assembly house. At first glance, these boards looked fine. But with a little closer inspection, you can see that the middle barrel isn't plated through. Bummer. There are... Read more

Oxidized Silver? What do you do???

I've written before about the shelf life of immersion silver PCBs. In that post, I alluded to the possibility of carefully cleaning an oxidized immersion silver pcb but I didn't say how to do it. Sometimes an oxidized board can... Read more

Immersion Silver and Other Lead Free PCB Surfaces

I just had a comment on an old post requesting a little more information on silver surfaced lead free boards. "Hi, im currently doing a project regarding Immersion Silver PCB. Pls share me more info for this kind of finishing... Read more

Halogen Free PCB

Halogen free PCBs still aren't that common and all of the bugs aren't worked out of the systems yet, but they are starting to show up here and there. I suspect that like RoHS a few years back, we will... Read more

RoHS Options Close By

Sometimes you feel like a nut and sometimes you don't. I hope that phrase isn't copyrighted by the Peter Paul Mounds candy company. Hmm. I'll just claim "fair use." I'm pretty sure that when I started writing this, it fit... Read more

OSP PCB Finish Problems

OSP (Organic Surface preservative, not Oregon State Patrol) isn't all that commonly seen in our shop. It has been a pretty common pcb finish for high-volume, low-cost products for quite a while and I've heard that it's starting to show... Read more

Restoring Immersion Sliver PCBS?

I've written before about immersion silver finished boards and some of the challenges associated with that technology. It's a popular choice for RoHS these days because it's inexpensive compared to some of the others, has a nice planar surface and,... Read more

Lead-free pcb finishes

RoHS became Euro-law more than a year ago but it seems like the Industry still hasn't agreed on what an ideal RoHS pcb finish might be. Part of the problem is that we aren't just dealing with RoHS issues these... Read more

Immersion Silver

Immersion Silver seems to be gaining popularity as a RoHS board finish. It is less expensive than Electroless-Nickel Immersion Gold (ENIG), safer then Immersion Tin, easier to use than Organic Solder Preservative (OSP) and has a more level surface than... Read more