Mike,

Do you have a name for the aerosol used with transparencies?  I use this
method and would like to print to be a little denser.

Thanks
Mark
Sacramento, CA

-----Original Message-----
From: Mike Singer [mailto:msinger@POLUOSTROV.NET]
Sent: Tuesday, July 08, 2003 10:19 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [Ee}: PCB developing time

Tal wrote:
> About the amounts:
> I don't know the name of the UV board but with the booklet
> that the seller gave me it says: "for developer (Caustic soda)
> use 10gr for 1 Liter. with tap water...". it's working just
> fine as I said before!

I'd recommend to google with "Dry film photoresist".
Lots of nuances were not discussed:

Time gap between exposition and etching, it should be long
enough.
Developer solution movement around PCB (have not you mention
that center area is usually developed slower?)
Copperclad thickness and ratio between copperclad and photoresist
thickness(yes I know the seller keeps these in a secret) ...

If you use laser printed transparency, you may want to enhance
it's contrast spraying on it special acetone-based aerosol.(I
tried - it helps)

Best Regards.

Mike.

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body

--
http://www.piclist.com#nomail Going offline? Don't AutoReply us!
email listserv@mitvma.mit.edu with SET PICList DIGEST in the body