For printing, I expert pcb pattern to pdf file. perfect double side matching! Now it is trouble for me to make single sided and I need use tape to cover unused side. ----- Original Message ----- From: "sergio masci" To: "Microcontroller discussion list - Public." Sent: Saturday, December 06, 2008 8:56 PM Subject: Re: [EE] Make Your Own PCB > > > On Sat, 6 Dec 2008, Mike Harrison wrote: > > > On Sat, 6 Dec 2008 00:58:14 -0500, you wrote: > > > > >By using techniques at home to make your own PCB, is it practical and > > >possible to make a board capable of mounting very fine pitch SOIC > > >chips (such as the PIC32, which is 0.4 mm pitch)? > > > > > > > I'd say .4mm is just doable given the right technique & a good transparency, but only just > > see www.electricstuff.co.uk/pcbs.html for info on making good homemade PCBs > > Getting a GOOD UV transparency is a big hurdle. Check the web and you'll > find that not all laser printers give the same good results. Some people > have had better luck with inkjets, others use two layers of tracing paper > per side. > > I have been toying with the idea of simply printing an enlarged image of > the tracks to white glossy paper then using this to expose the photoresist > via a "camera obscura". One could use a normal light source to set up the > artwork and PCB inside the camera then switch to UV to expose the PCB (yes > I know the wavelength of the light used is important when determining the > position of the focal plane). > > Regards > Sergio Masci > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist