Homebrew PCBs

----- Original Message ----- 
From: "Balan" <balan3@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Sunday, January 11, 2004 6:51 PM
Subject: [Homebrew_PCBs] Silk Screen


> Hi
>
> I am just learning the art of PCB making. Can Someone tell me is it
possible to transfer etch resist onto a board using Silk screen and if
possible what is the difference between toner transfer methord and the silk
screen.

I remember silk screen being used for making PCBs at English Electric
Kidsgrove when I was a student apprentice there over 40 years ago. I can't
remember how the actual silk screens were made (probably the same way as
those used for printing) but I do remember the operator putting the silk
screen and copper laminate together in a frame, applying the resist and
using a squeegee to spread it out. The copper laminate was then removed and
etched after the resist had dried.

This technique was only used on the less critical boards: power supplies and
the like.

They also used silk screen for applying the legends to PCBs, of course.

Leon
--
Leon Heller, G1HSM
Email: aqzf13@...
My low-cost Philips LPC210x ARM development system:
http://www.geocities.com/leon_heller/lpc2104.html