Homebrew PCBs

I've had good luck doing toner transfer with kitchen parchment paper.

Rick

-----Original Message-----
From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of MIKE DURKIN
Sent: Sunday, November 25, 2012 5:09 PM
To: homebrew_pcbs@yahoogroups.com
Subject: RE: [Homebrew_PCBs] Need comparing methods for smaller IC's (0.35mm
pads and 0.15mm interpads area)

Works for me too ...

Was the toner transfer with paper or vinyl ?

Mike KC7NOA 

> To: Homebrew_PCBs@yahoogroups.com
> From: jcyoungs76@...
> Date: Sun, 25 Nov 2012 18:38:43 -0500
> Subject: Re: [Homebrew_PCBs] Need comparing methods for smaller IC's 
> (0.35mm pads and 0.15mm interpads area)
> 
> i had no problems with the links try a different browser
> 
> On Sun, Nov 25, 2012 at 5:33 PM, Malcolm Parker-Lisberg < 
> mparkerlisberg@...> wrote:
> 
> > **
> >
> >
> > Your links don't work as your site says don't hot link when you 
> > click on them!
> >
> > Malcolm
> >
> >
> > I don't suffer from insanity I enjoy it!
> > Mene, mene, tekel, upharsin
> > The writing is on the wall.
> >
> > ________________________________
> > From: DJ Delorie <dj@...>
> > To: Homebrew_PCBs@yahoogroups.com
> > Sent: Sunday, November 25, 2012 10:22 PM
> > Subject: Re: [Homebrew_PCBs] Need comparing methods for smaller IC's 
> > (0.35mm pads and 0.15mm interpads area)
> >
> >
> >
> >
> >
> > I have no problem doing 0.5mm pitch ICs with UV films and an Epson 
> > R280
> > (2880 dpi) inkjet printer, although I use the jetstar films and 
> > custom printing software for the densest artwork.
> >
> > 0.5mm is 20 mil (12px for 600 dpi), and the pads are 13mil with 7mil 
> > gap. You might be able to do get away with 8/4 pixels (8 pixel 
> > lines, 4 pixel spaces) on a 600 dpi laser printer, if you've 
> > practiced enough :)
> >
> > The DPI of the laser printer isn't as important as how accurately it 
> > can place the toner without the toner being "fuzzy" around the 
> > edges. Most of the time, the copper edges aren't straight - they're 
> > "lumpy" as the toner is sort of "thrown" at the paper and doesn't 
> > always land exactly where you expect it. The "lumpyness" depends on 
> > your technique, printer, paper, etc.
> >
> > For reference, though, here's 6/6 done with toner:
> > http://www.delorie.com/pcb/lab/66-0.jpg
> > Compared to 6/6 done with UV film:
> > http://www.delorie.com/pcb/lab/6mil-front.jpg
> >
> > Here's a sample 0.5mm pitch part done with UV films:
> > http://www.delorie.com/pcb/lab/6mil-0.5mm.jpg
> >
> > [Non-text portions of this message have been removed]
> >
> >  
> >
> 
> 
> 
> --
> jeremy youngs
> 
> 
> [Non-text portions of this message have been removed]
> 
> 
> 
> ------------------------------------
> 
> Be sure to visit the group home and check for new Links, Files, and
Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> 
> 
> 
 		 	   		  

[Non-text portions of this message have been removed]



------------------------------------

Be sure to visit the group home and check for new Links, Files, and Photos:
http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links