Homebrew PCBs

Curious ... how small a trace width can you reliably get with your 
home-etching system?  I've been doing most things at 15-20mil so far, but 
wondering if I might get 10 mil reliably.

Cheers,
-Neil.

>From: Neil <cobra_neil@...>
>Reply-To: Homebrew_PCBs@yahoogroups.com
>To: Homebrew_PCBs@yahoogroups.com
>Subject: [Homebrew_PCBs] Smallest trace?
>Date: Sat, 10 May 2003 04:43:58 -0500
>
>Curious ... how small a trace width can you reliably get with your
>home-etching system?  I've been doing most things at 15-20mil so far, but
>wondering if I might get 10 mil reliably.


I think it is mostly a function of the artwork quality, and the collimation 
used on the UV exposure. Using transparencies made on an old LaserJet IIIp I 
can do 12/12 mils reliably, with 10 mil tracks between pads. I've heard of 
people going down to 8/8 with better printers.



--
Leon Heller, G1HSM Tel: +44 1424 423947
Email:leon_heller@...
My web page: http://www.geocities.com/leon_heller

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I have gotten professional results at 7 mil with photo etch. I have not
tried smaller as I have never had the need.
-Mike

----- Original Message -----

From: "Neil" <cobra_neil@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Saturday, May 10, 2003 2:43 AM
Subject: [Homebrew_PCBs] Smallest trace?


> Curious ... how small a trace width can you reliably get with your
> home-etching system?  I've been doing most things at 15-20mil so far, but
> wondering if I might get 10 mil reliably.
>
> Cheers,
> -Neil.
>
>
>
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In a message dated 5/10/2003 4:43:23 AM Central Standard Time, 
cobra_neil@... writes:

> I've been doing most things at 15-20mil so far, but 
> wondering if I might get 10 mil reliably

Neil:  Last time I had taken artwork over to the nearby professional 
multilayer PTH house I have used in the past, and asked, the lady (yes, it 
was a nearly-all-gal shop!) said they reliably do 10 mil wide traces with 5 
mill space between, but she declined to show me a working example!  Always 
quick to invoke the "OSHA rules" to those of us who ask, "Show me, please!" ! 
! ! 


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