Yahoo Groups archive

Homebrew PCBs

Index last updated: 2026-04-28 23:05 UTC

Message

Re: plated tin as the etch resist

2004-04-02 by ballendo

Message for Adam and/or Tom,

But open to anyone (Those two just have made it known they've done 
some higher volume processing)

What would you suggest for a person wanting to make perhaps 20 9x12 
boards a day (gonna use 8x11 of this), but not necessarily every day.

In other words, figure 100 boards this size per month (these are 
the "paneled up" size; I'll shear and/or route the final board sizes 
from these panels). But I don't want to make pcb's every day! One 
week a month sounds okay, which is how I got the 20 bds/day figure.

I have pcb drills (obviously<G>), and can screen print. Doing it 
already for lettering of PU painted metal.

I can make rectifiers for the plating.

What size "line" would I need to set up for two sided THP, 
soldermasked, SMD (not fine pitch) boards? 

So what I'm asking is, going beyond the one or two at a time, but not 
quite into the low end of the PCB mfrs. price structure, what should 
I do? (And what can I expect?)

Is setting up a line this size mostly about preserving/gaining the 
ability to make quick revisions? Or could it be fairly called money-
saving?

Thank you in advance,

Ballendo 


--- In Homebrew_PCBs@yahoogroups.com, Adam Seychell 
<adam_seychell@y...> wrote:
> 
> 
> Jeremy Taylor wrote:
> > My last post must been sent just prior to yours.
> > 
> > I actually ended up completely closing up some holes with the 
acid copper.
> 
> Does that mean the alkaline plate was more capable of completely 
> covering the holes walls with copper than compared to acid copper 
> plating ? Which bath was better ?
> 
> 
> > It' definitely a more aggressive plate. 
> 
> yes, the acid copper is fast, almost 100% coulombetric 
> efficient, good throwing power and easy to maintain and setup.
> This is why I suspect you have chosen alkaline plating because it 
> performed better when plating on the ink surface.
> 
> Regards,
> 
> Adam

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.