Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [Homebrew_PCBs] Re: Need a fine pitch stencil? Here's a method to create your own homebrew high

From: DJ Delorie <dj@...>
Date: 2008-01-18

Adam Seychell <a_seychell@...> writes:

> I was trying to etch for QFN packages with 0.5mm pitch, and could
> not get the required accuracy.

I've not had good luck with those; I now use 2mil brass for 0.5mm
pitch to reduce the problems. I can usually get good enough for 95%
of the pins, which is good enough for DIY I suppose.

> and etch undercut.

http://www.delorie.com/pcb/brass/20070220-60-top.jpg