From - Thu Nov 06 23:19:17 1997 Path: news.bc!News1.Vancouver.iSTAR.net!News.Toronto.iSTAR.net!news.istar.net!ais.net!cpk-news-hub1.bbnplanet.com!news.bbnplanet.com!europa.clark.net!169.207.30.81!newsfeeds.sol.net!uwm.edu!nntp.inc.net!news.inc.net!not-for-mail From: Terence Gunderson Newsgroups: sci.electronics.basics,sci.electronics.cad,sci.electronics.components,sci.electronics.misc,sci.electronics.repair Subject: Re: PCBoard fabrication question Date: Tue, 04 Nov 1997 11:14:27 -0800 Organization: OnSite Technical Services Lines: 46 Message-ID: <345F7413.58A1@lakefield.net> References: <345E3065.4680@concentric.net> Reply-To: tgunder@lakefield.net NNTP-Posting-Host: stonerd-6.lakefield.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.01 (Win16; I) Xref: news.bc sci.electronics.basics:3932 sci.electronics.cad:1345 sci.electronics.components:3265 sci.electronics.misc:3455 sci.electronics.repair:8481 > > I am trying to find a technique to transfer a circuit board layout > printed by my laser printer onto copper clad. Amy Torelli wrote: > > Hello all, > > I am trying to find a technique to transfer a circuit board layout > printed by my laser printer onto copper clad. > > Thanks in advance, Greetings : I have use the photographic technique using transparency film successfully to make single and double sided boards. To acheive the best image transfer, I let my laser printer warm up for atleast an hour or print out a large doccument berfore printing the image on the transparency. To acheive proper registration for producing double sided I print the pattern for the both sides onto transparancy film. Bearing in mind the mirroring of the opposing sides. Eyeball the two transparency sides together and, using a two hole punch, punch two holes in the two transparencies. Then insert plastic dowels, the same size as the punched holes, into the holes. The plastic dowels are now serving as registration pins. Sandwich a double sided sensistized board between the two transparencies. Sandwich the printed circuit board and transparencies between two sheets of glass, using bull dog heavy duty paper clips to hold the assembly together. Expose and etch both side per instructions. All parts can be found at any office supply store. (Plastic dowel is from the top section of Bic pens) Hope this helps. Terry tgunder@lakefield.net